AM1301-7RD1AHFU [BEL]
DC-DC Regulated Power Supply Module, 1 Output, 50W, 168.50 X 111.20 MM, 38.70 MM HEIGHT, METAL, CASE M02, MODULE;
| 型号： | AM1301-7RD1AHFU |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 50W, 168.50 X 111.20 MM, 38.70 MM HEIGHT, METAL, CASE M02, MODULE |
| 文件： | 总24页 (文件大小：536K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M-Family
DC-DC Converters <100 W
Rugged Environment
50 W DC-DC (AC-DC) Converters
M-Family
Class I Equipment
Single output: series AM...LM 1000
Dual output:
series AM...LM 2000
Triple output: series AM...LM 3000
Class II Equipment (double insulation)
Single output: series CMZ/DMZ/LMZ 1000
Dual output:
series CMZ/DMZ/LMZ 2000
Triple output: series CMZ/DMZ/LMZ 3000
• Extremely wide input voltage range suitable for
battery (and AC) operation
• Efficient input filter and built-in surge and transient
suppression circuitry
• 4 kVrms input to output electric strength test
• Outputs individually isolated and controlled
• Outputs fully protected against overload
Safety according to IEC 950
LGA
C
Table of Contents........................................... Page
Description .................................................................. 7 - 2
Type Survey ................................................................ 7 - 3
Safety and Installation Instructions ............................. 7 - 4
Functional Description................................................. 7 - 6
Electrical Input Data .................................................... 7 - 7
Electrical Output Data ................................................. 7 - 9
EMC and Immunity to Input Transients ..................... 7 - 13
Supplementary Data ................................................. 7 - 15
Description of Options............................................... 7 - 16
Immunity to Environmental Conditions...................... 7 - 22
Mechanical Data ....................................................... 7 - 24
Type Key and Product Marking ................................. 7 - 25
Description
The M-family of DC-DC (AC-DC) converters represents a
broad and flexible range of power supplies for use in ad-
vanced industrial electronic systems. Features include high
efficiency, reliability, low output voltage noise and excellent
dynamic response to load/line changes due to individual
regulation of each output.
to output isolation is provided. The modules are designed
and built according to the international safety standard
IEC 950 and have been approved by the safety agencies
LGA (Germany) and UL (USA). The UL Mark for Canada
has been officially recognized be regulatory authorities in
provinces across Canada.
The converter inputs are protected against surges and tran-
sients occuring at the source lines. An input over- and
undervoltage cut-out circuitry disables the outputs if the in-
put voltage is outside the specified range. Certain types in-
clude an inrush current limitation preventing circuit break-
ers and fuses from being damaged at switch-on.
The case design allows operation at nominal load up to
71°C in a free air ambient temperature. If forced cooling is
provided, the ambient temperature may exceed 71°C but
the case temperature should remain below 95°C under all
conditions.
A temperature sensor generates an inhibit signal which
disables the outputs if the case temperature TC exceeds the
limit. The outputs are automatically re-enabled when the
temperature drops below the limit.
All outputs are open- and short-circuit proof and are pro-
tected against overvoltages by means of built-in suppres-
sor diodes. The outputs can be inhibited by a logic signal
applied to the connector pin 2 (i). If the inhibit function is not
used pin 2 should be connected with pin 23 to enable the
outputs.
Various options are available to adapt the converters to in-
dividual applications.
The modules may either be plugged into 19 inch rack sys-
tems according to DIN 41494, or be chassis mounted.
LED indicators display the status of the converter and allow
visual monitoring of the system at any time.
Case: aluminium, black finish, self cooling.
Dimensions: 38.7 × 111.2 × 168.5 mm. Weight: 770 g.
Full input to output, input to case, output to case and output
7 - 2
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Type Survey
Options see "Descriptions of Options"
General note
The type survey tables provide an overview of the basic input and output configurations. More than 500 different types
have been manufactured providing different output configurations and customized specialities. Please consult Melcher's
field sales engineers for specific requirements. The best technical solution will carefully be considered and a detailed pro-
posal submitted.
Table 1a: Class I equipment
Output 1
Output 2
Output 3
Input Voltage Range and Efficiency1
Option
Uo nom Io nom
Uo nom Io nom
Uo nom Io nom
Ui min...Ui max
η min
Ui min...Ui max
η min
Ui min...Ui max
η min
V DC
A
V DC
A
V DC
A
8...35 V DC
%
14...70 V DC
%
20...100 V DC
%
5.1 8.0
12.0 4.0
15.0 3.4
24.0 2.0
48.0 1.0
AM 1001-7R
AM 1301-7R
AM 1501-7R
AM 1601-7R
AM 1901-7R
72
79
79
81
81
BM 1001-7R
BM 1301-7R
BM 1501-7R
BM 1601-7R
BM 1901-7R
74
80
81
83
83
FM 1001-7R
FM 1301-7R
FM 1501-7R
FM 1601-7R
FM 1901-7R
74
80
81
82
83
–9
P
D0...D9
V0,V2,V3
A
12.0 2.0
15.0 1.7
12.0 2.0
15.0 1.7
AM 2320-7
AM 2540-7
77
78
BM 2320-7
BM 2540-7
79
80
FM 2320-7
FM 2540-7
80
79
H
F
5.1 5.0
5.1 5.0
12.0 0.7
15.0 0.6
12.0 0.7
15.0 0.6
AM 3020-7
AM 3040-7
75
75
BM 3020-7
BM 3040-7
76
76
FM 3020-7
FM 3040-7
76
76
U
Table 1b: Class I equipment
Output 1
Output 2
Output 3
Input Voltage Range and Efficiency 1
Option
Uo nom Io nom
Uo nom Io nom
Uo nom Io nom
Ui min...Ui max
28…140 V DC
η min
%
Ui min...Ui max
44…220 V DC
η min
%
Ui min...Ui max
88...372 V DC
(85...264 V AC)
η min
%
V DC
A
V DC
A
V DC
A
5.1 8.0
12.0 4.0
15.0 3.4
24.0 2.0
48.0 1.0
CM 1001-7R
CM 1301-7R
CM 1501-7R
CM 1601-7R
CM 1901-7R
74
80
82
82
82
DM 1001-7R
DM 1301-7R
DM 1501-7R
DM 1601-7R
DM 1901-7R
74
81
82
83
83
LM 1001-7R
LM 1301-7R
LM 1501-7R
LM 1601-7R
LM 1901-7R
73
79
78
81
81
–9
E
P
D0...D9
V0,V2,V3
12.0 2.0
15.0 1.7
12.0 2.0
15.0 1.7
CM 2320-7
CM 2540-7
79
80
DM 2320-7
DM 2540-7
80
80
LM 2320-7
LM 2540-7
77
78
A
H
5.1 5.0
5.1 5.0
12.0 0.7
15.0 0.6
12.0 0.7
15.0 0.6
CM 3020-7
CM 3040-7
76
76
DM 3020-7
DM 3040-7
77
76
LM 3020-7
LM 3040-7
73
71
F
U
Table 2: Class II equipment (double insulation)
Output 1
Output 2
Output 3
Input Voltage Range and Efficiency1
Option
Uo nom Io nom
Uo nom Io nom
Uo nom Io nom
Ui min...Ui max
28...140 V DC
η min
%
Ui min...Ui max
44...220 V DC
η min
%
Ui min...Ui max
88...372 V DC
(85...264 V AC)
η min
%
V DC
A
V DC
A
V DC
A
5.1 8.0
12.0 4.0
15.0 3.4
24.0 2.0
48.0 1.0
CMZ 1001-7R
CMZ 1301-7R
CMZ 1501-7R
CMZ 1601-7R
CMZ 1901-7R
74
80
82
82
82
DMZ 1001-7R
DMZ 1301-7R
DMZ 1501-7R
DMZ 1601-7R
DMZ 1901-7R
74
81
82
83
83
LMZ 1001-7R
LMZ 1301-7R
LMZ 1501-7R
LMZ 1601-7R
LMZ 1901-7R
73
79
78
81
81
–9
E
P
D0…D9
V0,V2,V3
12.0 2.0
15.0 1.7
12.0 2.0
15.0 1.7
CMZ 2320-7
CMZ 2540-7
79
80
DMZ 2320-7
DMZ 2540-7
80
80
LMZ 2320-7
LMZ 2540-7
77
78
A
H
5.1 5.0
5.1 5.0
12.0 0.7
15.0 0.6
12.0 0.7
15.0 0.6
CMZ 3020-7
CMZ 3040-7
76
76
DMZ 3020-7
DMZ 3040-7
77
76
LMZ 3020-7
LMZ 3040-7
73
71
F
U
1 Efficiency measured at Ui nom and Io nom
Notes:
EM types with an input voltage range of 67...385 V DC are available upon request
Remarks: LM types may be operated in AC mode within a frequency range of 47...440 Hz and LMZ types within a fre-
quency range of 47...65 Hz.
Edition 2/96 - © Melcher AG
7 - 3
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Safety and Installation Instructions
Safety
For safety reasons, the power supply modules must be wired via the female connector H11 (according to DIN 41612,
see section "Accessories") in order to meet national and international safety requirements!
If the output circuit of a DC-DC converter is operator-acces-
sible according to the IEC 950 related safety standards, it
shall be an SELV circuit (Safety Extra Low Voltage circuit,
i.e. a circuit, separated from mains by at least basic insula-
tion, that is so designed and protected that under normal
and single fault conditions, the voltage between any two
conductors and between any conductor and earth does not
exceed 60 V DC).
the output circuit. However, it is the sole responsibility of the
installer or user to assure the compliance with the relevant
and applicable safety standards.
Since the M-family DC-DC converters provide double or re-
inforced insulation between input and output, based on an
input voltage of 250 V AC and 400 V DC, only operational
insulation between the AC mains and the input of the DC-
DC converter is needed according to the following table.
In the following section an interpretation is provided of the
IEC 950 safety standard with respect to the safety status of
If the table below is observed, the output of a DC-DC con-
verter is considered to be an SELV circuit up to a nominal
output voltage of 36 V.
Table 3: Insulation concept
Nominal Minimum required grade of
Maximum Minimum required safety
Minimum required grade
of isolation between the
input and the output
provided by the
Resulting
safety
status
of the
DC-DC
output
mains
supply
voltage
(AC)
isolation, to be provided by
the AC-DC front end,
including mains supplied
battery charger
output
status of the front end
output circuit
voltage
from the
front end
DC-DC converter
≤250V
Operational
≤400 V 1
Primary circuit
Reinforced, based on
AC 250 V and DC 400 V 1
SELV
circuit
1 With LMZ converters, the maximum rated output voltage of the front end is 250 V according to IEC 950.
AM...LM types correspond to class I equipment, while the
C/D/LMZ types correspond to class II equipment.
the fully assembled modules are individually tested for elec-
tric strength and earth continuity (see "Supplementary
Data"). All electric strength tests are performed as factory
tests.
In class I equipment the connector protective earthing pin is
leading while it is omitted in class II equipment (no protec-
tive earthing is required). Class II equipment provides rein-
forced insulation between input and output circuitry and
also between input and case. There are two class II Y-ca-
pacitors connected in series between input and output cir-
cuitry instead of havingY-capacitors connected to the case.
The UL 1950 recognition limits the maximum ambient op-
erational temperature of the standard modules to TA
=
TA max –15 K. Option U allows the operation in applications
where the full operational temperature range according to
the relevant data sheet and UL 1950 recognition is re-
quired.
During the production process, all transformers and each of
Important Advice
Electric strength tests should not be repeated in the field. Improper test methods, for example overshooting or oscillating
test voltages, voltage slopes exceeding 1 kV/µs, internal Y-capacitors not carefully discharged, etc. can cause severe
damage to switching devices and ICs. Melcher AG will not honour any guarantee/warranty claims resulting from high
voltage field tests.
7 - 4
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Installation Instructions
Installation of the power supply must strictly follow the na-
tional safety regulations. To observe the safety require-
ments according to EN 60950/IEC 950, the module shall be
connected via the female connector type H11 (see section
"Accessories"). Other installation methods may not meet
the safety requirements. A second fuse should be installed
in the wiring to pin 29 if:
– Input to earth impedance is high or undefined
– Phase and neutral of the mains are not defined (AC-DC
converters)
Reverse polarity at the input of A...D/FM and C/DMZ types
will cause the fuse to blow. In E/LM and LMZ types a series
diode will protect the module. A series diode is not incorpo-
rated in A...D/FM and C/DMZ types to avoid unwanted
power loss.
– Local requirements demand an individual fuse in each
source line
Whenever the inhibit function is not required, pin 2 (i)
should be connected to pin 23 to enable the output(s).
Table 4: H11 connector pin allocation
Electrical Determination
A…LM 1000
C/D/LMZ 1000
A…LM 2000
C/D/LMZ 2000
A…LM 3000
C/D/LMZ 3000
Pin
Ident
Pin
Ident
Pin
Ident
Pin
Ident
Pin
Ident
Pin
Ident
Inhibit control input
2
5
i
2
5
i
2
5
i
2
5
i
2
5
i
2
5
i
Safe Data or ACFAIL
D or V
D or V
D or V
D or V
D or V
D or V
Output voltage (positive)
Output voltage (negative)
8
Vo1+
Vo1–
8
Vo1+
Vo1–
8
8
8
Vo3+
Vo3–
8
Vo3+
Vo3–
11
11
11
11
11
11
Control input +1
Control input –
14
17
R
G
14
17
R
G
Output voltage (positive)
Output voltage (negative)
14
17
Vo2+
Vo2–
14
17
Vo2+
Vo2–
14
17
Vo2+
Vo2–
14
17
Vo2+
Vo2–
Output voltage (positive)
Output voltage (negative)
20
23
Vo1+
Vo1–
20
23
Vo1+
Vo1–
20
23
Vo1+
Vo1–
20
23
Vo1+
Vo1–
20
23
Vo1+
Vo1–
20
23
Vo1+
Vo1–
Protective earthing 2
26
26
26
DC input voltage 3
DC input voltage
29
32
Vi+
Vi–
29
32
Vi+
Vi–
29
32
Vi+
Vi–
29
32
Vi+
Vi–
29
32
Vi+
Vi–
29
32
Vi+
Vi–
AC input voltage 4
AC input voltage
29
32
N
P
29
32
N
P
29
32
N
P
29
32
N
P
29
32
N
P
29
32
N
P
1
2
3
4
This function is not simultaneously available with option P
Leading pin (pregrounding)
A/B/C/D/E/FM and C/DMZ types
LM/LMZ types
Degree of Protection
Condition: Female connector fitted to the unit
IP 40:
IP 30:
IP 20:
All units, except those with options P, A, K, D or V with potentiometer adjustment.
All units, except those with option P, D or V with potentiometer adjustment.
All units fitted with options which include potentiometer setting.
Leakage Currents and Insulation
Please refer to "Supplementary Data"
Edition 2/96 - © Melcher AG
7 - 5
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Functional Description
mary switching transistor. This signal is fed back via a cou-
pling transformer.
The input voltage is fed via an input fuse, an input filter, a
rectifier 3 and an inrush current limiter 4 to the input capaci-
tor. This capacitor sources a single transistor forward con-
verter. Each output is powered by a separate secondary
winding of the main transformer. The resultant voltages are
rectified and their ripples smoothed by a power choke and
an output filter. The control logic senses the main output
voltage Uo1 and generates, with respect to the maximum
admissible output currents, the control signal for the pri-
The auxiliary outputs Uo2 and Uo3 are individually regulated
by means of secondary switching transistors. Each aux-
iliary output's current is sensed using a current transformer.
If one of the outputs is driven into current limit, the other
outputs will reduce their output voltages as well because all
output currents are controlled by the same control circuit.
P
2
5
5
5
Main control circuit
14
17
20
23
Y
Output 1
filter
29
1
2
3
4
MKT
MKT
14
17
Control
circuit
Output 2
filter
8
32
26
Control
circuit
Output 3
filter
11
Y
Fig. 1a
DC-DC (AC-DC) converter block diagram, class I equipment
P
Y
Y
2
5
5
5
Main control circuit
14
17
20
23
Output 1
filter
29
1
2
3
4
14
17
Control
circuit
Output 2
filter
8
32
Control
circuit
Output 3
filter
11
1 Transient suppressor (VDR) in C/D/E/F/LM and C/D/LMZ
2 Transient suppressor diode in A/B/C/FM and CMZ types
3 Bridge rectifier in LM/LMZ, series diode in EM types
4 Inrush current limiter (NTC) in C/D/E/LM and C/D/LMZ types
(option E: refer to the description of option E)
5 Single output modules A...LM 1000 and C/D/LMZ 1000 with
feature R
Fig. 1b
DC-DC (AC-DC) converter block diagram,
class II equipment (double insulation)
7 - 6
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Electrical Input Data
General conditions:
– TA = 25°C, unless TC is specified.
– Connector pins 2 and 23 interconnected, with option P: Uo = Uo nom, R input not connected.
Table 5a: Input data
Input
AM
BM
FM
CM/CMZ
Characteristics
Conditions
min typ max min typ max min typ max min typ max
Unit
Ui
Input voltage range
Io = 0…Io nom
TC min…TC max
8
35
14
70
20
100
28
140
V DC
Ui nom Nominal input voltage
15
30
50
60
2
Ii
Input current
Ui nom, Io nom
4.0
2.0
2.0
1.0
A
Pi 0
No-load input power: Ui nom
Single output
Double output
Triple output
Io1,2,3 = 0
1
7
6
1.5
9
9
1
7
6
1.5
9
9
1
7
6
1.5
9
9
1
7
6
1.5
9
9
W
Pi inh Idle input power
inhibit mode
1.5
1.5
1.5
1.5
W
A
6
Iinr p Peak inrush current
Ui = Ui max
RS = 0 Ω 3
TC = 25°C
400
500
400
170 4
tinr r
Rise time
60
50
40
60
60
µs
tinr h Trailing edge half-life
170
100
280
Ri
Ci
Input resistance
TC = 25°C
87.5
2600
0
140
250
824 4
370
0
mΩ
µF
Input capacitance
4000 670
40
1100 370
600
120
600
160
Ui abs Input voltage limits
without any damage
0
80
0
V DC
Table 5b: Input data
Input
DM/DMZ
EM
typ
-
LM/LMZ
Characteristics
Conditions
min
typ
-
max
min
max
385
min
typ
max
264
372
Unit
V AC 1
V DC
Ui
Input voltage range
Io = 0…Io nom
TC min…TC max
85
88
44
220
67
Ui nom Nominal input voltage
Ii Input current
110
220
310
2
Ui nom, Io nom
0.55
0.275
0.20
A
Pi 0 No-load input power: Ui nom
Single output
Double output
Triple output
Io1,2,3 = 0
1
7
6
1.5
9
9
1
7
6
1.5
9
9
1
7
6
1.5
9
9
W
Pi inh Idle input power
inhibit mode
1.5
1.5
1.5
W
A
6
Iinr p Peak inrush current
Ui = Ui max
RS = 0 Ω 3
TC = 25°C
110 4
160 4
60 4
tinr r Rise time
40
40
300
900
µs
tinr h Trailing edge half-life
250
240
Ri
Ci
Input resistance
TC = 25°C
2000 4
24004
140
62004
140
-400
0
mΩ
µF
Input capacitance
140
0
270
270
400
–
270
400
284
Ui abs Input voltage limits
without any damage
400 5 -400
V DC
V AC
–
–
–
1 In AC powered mode: LM types: 47...440 Hz; LMZ types: 47...65 Hz
2 With multiple output modules, the same condition for each output applies.
3 RS = source resistance.
4 Value for initial switch-on cycle.
5 1 s max., duty cycle 1% max.
6 Iinr p = Ui/(Rs + Ri)
Edition 2/96 - © Melcher AG
7 - 7
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Input fuse
Table 6: Fuse types (slow-blow)
A fuse holder containing a slow-blow type fuse (Dimension:
5 × 20 mm) is mounted in the converter's back plate. The
fuse protects the module against severe defects. It may not
fully protect the module at input voltages exceeding
200 V DC. In applications where the converters operate at
DC source voltages above 200 V DC, an external fuse or a
circuit breaker at system level should be installed.
Series
AM 1000...3000
Schurter type
Part number
0001.2514
0001.2513
0001.2511
0001.2509
0001.2508
SPT 10 A 250 V
BM 1000...3000
FM 1000...3000
SPT 8 A
SPT 5 A
250 V
250 V
CM/CMZ 1000...3000
SPT 3.15 A 250 V
SPT 2.5 A 250 V
For applications where the fuse should be inaccessible:
see option F.
DM/DMZ 1000...3000
EM 1000...3000
LM/LMZ 1000...3000
Input Under-/Overvoltage Cut-out
Inrush Current
If the input voltage remains below 0.8 Ui min or exceeds
1.1Ui max (approx. values), an internally generated inhibit
signal disables the output(s). When checking this function
the absolute maximum input voltage rating Ui abs must be
carefully considered (see table "Input Data").
The C...LM and C/D/LMZ (excluding FM) modules incorpo-
rate a NTC resistor in the input circuitry which (during the
initial switch-on cycle) limits the peak inrush current to
avoid damage to connectors and switching devices. Subse-
quent switch-on cycles within a short interval will cause an
increase of the peak inrush current due to the warming up
of the NTC resistor. Refer also to option E description.
I i [A]
10.00
I
[A]
i
A…FM
LM
400
BM
350
AM
FM
AM
300
50; 250
40; 200
30; 150
20; 100
10; 50
BM
1.00
FM
LM/LMZ
CM/CMZ
EM
DM/DMZ
DM/DMZ
CM/CMZ
EM
LM/LMZ
U i
DC
________
0.10
t [ms]
0
U i min
1
2
3
4
5
6
DC
0.8
2.0
1.6 A…EM
0
0.2 0.4 0.6
0.5 1.0 1.5
1.0 1.2 1.4
2.5 3.0 3.5
4.0
LM
Fig. 2
Fig. 3
Typical input current versus relative input voltage at
Typical inrush current at initial switch-on cycle and at
nominal output load
Ui max [DC] versus time
7 - 8
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Electrical Output Data
General conditions
– TA = 25°C, unless TC is specified.
– Connector pins 2 and 23 interconnected, Uo = Uo nom (option P), R input not connected.
Table 7: Output data
Output
Uo nom
5.1 V
12 V
15 V
24 V
48 V
Characteristics
Conditions
min typ max min typ max min typ max min typ max min typ max Unit
1
Uo
Output voltage
Ui nom, Io nom
Io nom
5.07
5.13 11.93
12.07 14.91
15.09 23.86
24.14 47.72
48.28
V
Uo L Overvoltage prot.
Io nom Output current
7.5
2
21
25
41
85
Ui min...Ui max
TC min...TC max
see tables 1 and 2
see fig. 4
Io L
Output current
limitation response
1
uo1/2/3 Output voltage noise Ui nom, Io nom
4
3
6
3
6
3
6
4
8
mVrms
Bandwidth =
20 MHz
uo1
15 30
60 120
±10 ±30
25 50
40 80
±12 ±50
35 70
40 80
±15 ±60
40 80
40 80
±15 ±60
50 100 mVpp
uo2/3
-
∆Uo U Static line regulation Ui min...Ui nom
±15 ±60 mV
Ui nom...Ui max
1
Io nom
∆Uo I Static load regulation Ui nom
6
0
25
13 50
17 60
30 80
60 150
Io = Io nom...0 2
∆Uo Ic Static cross load
Ui nom
Io = Io nom...0 3
±15
0
±20
0
±30
0
±130
1
±40
-
regulation 4
uo d
td
Dynamic load
regulation
Ui nom
Io =
1/0.33/1•Io nom
fig. 5
,
±220
0.6
±110
0.6
±150
0.5
±150
2
3
Dynamic load regu-
lation time constant
2
ms
mV
ms
uo dc Dynamic cross load Ui nom
,
+10
-100
+10
-75
+10
-140
+20
-200
-
-
regulation 4
Io =
1/0.33/1•Io nom
fig. 5
tdc
Dynamic cross load
reg. time constant 4
0.05
0.5
0.2
0.3
0.5
0.7
1
2
-
-
α Uo
Output voltage
deviation versus
case temperature
TC min...TC max
±0.02
±1.0
±0.02
±2.4
±0.02
±3.0
±0.02
±4.8
±0.02
±9.6
%/K
mV/K
1 With multiple output modules, the same condition for each output applies.
2 Condition for specified output. With multiple output modules, other output(s) loaded with constant current Io = Io nom
.
3 Condition for non-specified output, individually tested, other output(s) loaded with constant current Io = Io nom
4 Multiple output modules.
.
Output Protection
In parallel operation, one or more of the main outputs may
operate continuously in current limit which will cause an in-
crease in case temperature. Consequently, a reduction of
the max. ambient temperature by 10 K is recommended.
Each output is protected against overvoltages which could
occur due to a failure of the internal control circuit. Voltage
suppressor diodes (which under worst case condition may
become a short circuit) provide the required protection.The
suppressor diodes are not designed to withstand externally
applied overvoltages. Overload at any of the outputs will
cause a shut-down of all outputs. A red LED indicates the
overload condition of the respective output.
Main or auxiliary outputs can be connected in series with
any other output of the same or another module. In series
connection, the maximum output current is limited by the
lowest current limit. Output ripple and regulation values are
added. Connection wiring should be kept as short as possi-
ble.
Parallel and Series Connection
Main outputs of equal nominal voltage can be connected in
parallel. It is important to assure that the main output of a
multiple output module is forced to supply a minimum cur-
rent of 0.1 A to enable correct operation of its own auxiliary
outputs.
If output terminals are connected together in order to estab-
lish multi-voltage configurations, e.g. +5.1 V, ±12 V etc. the
common ground connecting point should be as close as
possible to the connector of the converter to avoid exces-
sive output ripple voltages.
Auxiliary outputs should never be connected in parallel!
Edition 2/96 - © Melcher AG
7 - 9
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Uo1
∆U
o
Uo1 nom
Io nom
IoL1
u
od
IoL2,IoL3
1.0
.95
u
od
t
d
AM...LM and C/D/LMZ
t
d
Io1
t
Io2,Io3
0.5
I /I
o
o nom
3/3
2/3
1/3
0
Io
Io nom
t
0
≥10 µs
≥10 µs
0.5
1.0
1.2
Fig. 5
Control deviation of Uo versus dynamic load change
Fig. 4
Typical output voltage Uo1 versus output currents Io
Output Current Allocation for special Types
Output currents differing from those given for standard
types (as per "Type Survey") can be provided. A maximum
output power of 50 W should be considered, if an ambient
temperature range of –25...71°C is required.The maximum
permissible output currents are indicated in the table below.
If (upon customer's request) output voltages are different
from standard values, the relevant output currents have to
be adapted accordingly.
With reduced maximum ambient temperature or with forced
cooling, the total output power may exceed 50 W. Custom-
ized configurations always need to be checked by a feasi-
bility study first. Please ask Melcher's sales engineers for a
proposal appropriate to your specific needs.
Table 8: Current allocation with special types
Output voltage
all types
Uo1/2/3 nom [V]
Output 1
all types
Io1 max [A]
Output 2
A...LM 2000
Io2 max [A]
Output 2
A...LM 3000
Io2 max [A]
Output 3
A...LM 3000
Io3 max [A]
Temperature
TA [°C]
TC [°C]
5.1
12
15
24
8.0
4.0
3.4
2.0
4.0
2.0
1.7
1.0
1.8 (2.5 1)
1.5
1.5
1.2
1.0
0.5
–25...71
–25...60
–25...50
–25...95
1.2
0.7
2
5.1
12
15
24
10.0
5.0
4.0
2.5
4.5
2.5
2.0
1.3
2.1 (2.8 1)
1.7
1.8
1.5
1.3
0.7
–25...90
–25...85
1.5
0.9
5.1
12
15
24
11.0
6.0
4.6
3.0
5.0
3.0
2.3
1.5
2.4 (3.0 1)
2.0
2.0
1.7
1.5
0.8
1.7
1.0
2
1 Special high current components required, Ui min has to be increased
Inhibit (i Input)
The outputs of the module may be enabled or disabled by
means of a logic signal (TTL, CMOS, etc.) applied to the
inhibit input. If the inhibit function is not required, connect
the inhibit pin 2 to pin 23 to enable the outputs (active low
logic, fail safe).
The reference for the inhibit signal is the negative pin of
output 1.
Iinh [mA]
Uinh= 2.4 V
Uinh= 0.8 V
2.0
1.6
1.2
Vi+
Vo+
i
0.8
0.4
Uo = on
Uo = off
Iinh
Uinh
0
-0.4
-0.8
Vi–
Vo–
Uinh [V]
-50
-30
-10 0 10
30
50
-40
-20
20
40
Fig. 7
Typical inhibit current Iinh versus inhibit voltage Uinh
Fig. 6
Definition of inhibit voltage and current
7 - 10
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Table 9: Inhibit data
Characteristics
Conditions
min
–50
2.4
–60
typ
max
0.8
50
Unit
Uinh
Inhibit input voltage causing
output voltage being…
switched on
switched off
Ui min...Ui max
V DC
Iinh
Inhibit current
Uinh = 0
–100
–220
µA
Hold-up Time and Output Response
When the input voltage is switched off the output voltage
will remain high for a certain hold-up time th (fig. 8) before
the output voltage falls below 0.95 Uo nom. To achieve the
hold-up times indicated in fig. 9, A/B/C/D/FM and C/DMZ
modules require an external series diode in the input path.
This is necessary to prevent the discharge of the input ca-
pacitor through the source impedance or other circuits con-
nected to the same source. E/LM and LMZ modules have a
built-in series diode. In A/B/C/D/FM and C/DMZ modules,
no series diode is built-in, since it would generate up to
10 W of additional power loss inside the converter. Conse-
quently the maximum operational ambient temperature
would have to be reduced accordingly.
The behavior of the outputs is similar with either the input
voltage applied or the inhibit switched low.
An output voltage overshoot will not occur when the module
is turned on or off.
th [ms]
1000.00
LM/LMZ
EM
Output
100.00
Uo nom
C/DM, C/DMZ
0.95Uo nom
A/B/FM
0.1
0
t
t r
t f
10.00
t h
Ui
1
0
t
t
1.00
Inhibit
1
U i DC
_____
0.10
0
Ui min DC
1
2
3
4
5
6
Fig. 8
Fig. 9
Typical hold-up time th versus relative input voltage at Io nom
Output response as a function of input voltage (on/off
switching) or inhibit control
Table 10: Output response time tr, values not applicable for modules equipped with option E
Type of Converter
tr at Po =0 and tf at Po =Po nom tr and tf at Po =3/4 Po nom
tr at Po =Po nom
Unit
ms
typ
max
typ
max
typ
max
A...LM 1001-7R and C/D/LMZ 1001-7R
A...LM 1301-7R and C/D/LMZ 1301-7R
A...LM 1501-7R and C/D/LMZ 1501-7R
A...LM 1601-7R and C/D/LMZ 1601-7R
A...LM 1901-7R and C/D/LMZ 1901-7R
5
10
5
10
20
10
5
15
10
10
30
20
10
20
20
40
30
60
15
65
30
130
25
100
50
200
40
80
165
330
A...LM 2320-7 and C/D/LMZ 2320-7
A...LM 2540-7 and C/D/LMZ 2540-7
20
15
40
30
30
20
60
40
50
35
100
70
A...LM 3020-7 and C/D/LMZ 3020-7
A...LM 3040-7 and C/D/LMZ 3040-7
55
40
110
80
85
60
170
120
145
100
290
200
Conditions:
R input not used. For multiple output modules the figures indicated in the table above relate to the output which reacts
slowest. All outputs are resistively loaded. Variation of the input voltage within Ui min...Ui max does not influence the values.
Edition 2/96 - © Melcher AG
7 - 11
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Programmable Voltage (R Input)
The value of R'ext should never be less than 47 kΩ to avoid
damage to the unit! R inputs may be parallel connected, but
1/Rtot = 1/R1 + 1/R2 +.... should be considered.
As a standard feature single output modules offer an
adjustable output voltage identified by letter R in the type
designation. The control input R (pin 14) accepts either a
control voltage Uext or a resistor Rext to adjust the desired
output voltage. When not connected, the control input auto-
matically sets the output voltage to Uo nom.The control input
is protected against external overvoltage up to 8 V max.
Remark
The R-feature excludes option P (output voltage adjust-
ment by potentiometer).
Vo1+
R
Vi+
a) Adjustment by means of an external control voltage Uext
between pin 14 (R) and pin 17 (G):
29
20
14
The control voltage range is 0...2.75 V and allows an
adjustment in the range of approximately
2.5 V
4 kΩ
+
–
Uo = 0...110% Uo nom
U
.
control
circuit
Uext
Uext ≈ ––––o –– • 2.5 V
Uo nom
G
17
23
b) Adjustment by means of an external resistor:
Depending upon the value of the required output volt-
age, the resistor shall be connected
either: Between pin 14 and pin 17 (Uo < Uo nom) to
achieve an output voltage adjustment range of approx.
Uo = 0...100% Uo nom
Vo1–
Vi–
Vi+
AM…LM 1000
C/D/LMZ 1000
32
29
Vo1+
R
20
14
U
ext ≈ 4 kΩ • –––––o––––
R'ext
R
Uo nom – Uo
2.5 V
4 kΩ
or: Between pin 14 and pin 20 (Uo > Uo nom) to achieve
an output voltage adjustment range of approximately
control
circuit
Rext
Uo = 100...110% of Uo nom
.
G
17
23
(Uo – 2.5 V)
R'ext ≈ 4 kΩ • ––––––––––––––––––
2.5 V •(Uo/Uo nom – 1)
Vo1–
Vi–
AM…LM 1000
C/D/LMZ 1000
32
For output voltages Uo > Uo nom, the minimum input voltage
according to "Electrical Input Data" increases proportionally
Fig. 10
Output voltage control by means of the R input
to Uo/Uo nom
.
Warning
Table 11a: Rext for Uo < Uo nom (conditions: Ui nom, Io nom, rounded up to resistor values E 96, Rext' = ∞)
Uo nom = 5.1 V
Uo nom = 12 V
Uo nom = 15 V
Uo nom = 24 V
Uo nom = 48 V
Uo [V]
Rext [kΩ]
Uo [V]
Rext [kΩ]
Uo [V]
Rext [kΩ]
Uo [V]
Rext [kΩ]
Uo [V]
Rext [kΩ]
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0.432
0.976
1.65
2.61
3.83
5.76
8.66
14.7
30.1
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
0.806
1.33
2.0
2.87
4.02
5.62
8.06
12.1
20.0
44.2
2.0
4.0
6.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
0.619
1.47
2.67
4.53
6.04
8.06
11.0
16.2
26.1
56.2
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
22.0
0.806
1.33
2.0
2.87
4.02
5.62
8.06
12.1
20.0
44.2
8.0
12.0
16.0
20.0
24.0
28.0
32.0
36.0
40.0
44.0
0.806
1.33
2.0
2.87
4.02
5.62
8.06
12.1
20.0
44.2
200.0
Table 11b: R'ext for Uo > Uo nom (conditions: Ui nom, Io nom, rounded up to resistor values E 96, Rext = ∞)
Uo nom = 5.1 V
Uo [V] R'ext [kΩ]
Uo nom = 12 V
Uo nom = 15 V
Uo nom = 24 V
Uo nom = 48 V
Uo [V]
R'ext [kΩ]
Uo [V]
R'ext [kΩ]
Uo [V]
R'ext [kΩ]
Uo [V]
R'ext [kΩ]
5.15
5.20
5.25
5.30
5.35
5.40
5.45
5.50
464
215
147
110
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
13.0
13.2
1780
909
619
464
383
316
274
249
200
169
15.2
15.4
15.6
15.8
16.0
16.2
16.4
16.5
1470
750
511
383
332
274
237
226
24.25
24.50
24.75
25.00
25.25
25.50
25.75
26.00
26.25
26.40
3160
1620
1100
825
715
590
511
453
402
383
48.5
49.0
49.5
50.0
50.5
51.0
51.5
52.0
52.5
52.8
6810
3480
2370
1780
1470
1270
1100
953
90.9
78.7
68.1
61.9
845
806
7 - 12
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
EMC and Immunity to Input Transients
A suppressor diode or a metal oxide VDR (depending upon
the type) together with an input fuse and an input filter form
an effective protection against high input transient voltages
which typically occur in most installations, but especially in
battery driven mobile applications. The M-family has been
successfully tested to the following specifications:
Electromagnetic Immunity
Table 12: Immunity type tests
Impulse voltage IEC 255-4
III
III
i/o, i/c, o/c
+i/–i, +o/–o
5000 Vp
1.2/50 µs
500 Ω
200 Ω
3 pos. and 3 neg.
impulses per
coupling mode
no
App. E4 6
(1976)
1
1
High frequency IEC 255-4
i/o, i/c, o/o, o/c
+i/–i, +o/–o
2500 Vp
1000 Vp
400 damped
1 MHz waves/s
2 s per
coupling mode
yes
disturbance
App. E5 6
(1976)
Voltage surge
IEC 571-1 3
(1990-07)
i/c, +i/–i
800 Vp
1500 Vp
3000 Vp
4000 Vp
7000 Vp
3.5 • Ubatt
1.5 • Ubatt
960 Vp
100 µs
50 µs
100 Ω
1 pos. and 1 neg. yes
voltage surge per
coupling mode
5 µs
1 µs
100 ns
20 ms
1
Supply related
surge
RIA 12
(1984)
A 5
B
C
D
E
F
+i/–i
0.2 Ω
5 Ω
1 positive
surge
yes
1 s
Direct transient
10/100 µs
5/50 µs
0.5/5 µs
0.1/1 µs
0.05/0.1 µs
5/50 µs
0.5/5 µs
0.1/1 µs
0.05/0.1 µs
1/50 ns
5 pos. and 5 neg.
impulses
1800 Vp
3600 Vp
4800 Vp
8400 Vp
1800 Vp
3600 Vp
4800 Vp
8400 Vp
100 Ω
G
H
J
Indirect coupled
transient
i/c
K
L
1
Electrostatic
discharge
IEC 801-2
(1991-04)
4
contact discharge 8000 Vp
to case,
330 Ω
10 positive and
10 negative
discharges
yes
air dischg. to case 15000 Vp
2
1
Electric field
IEC 801-3
(1984)
3
3
antenna in
1 m distance
10 V/m AM modulated
80%, 1 kHz
26…1000 MHz
yes
yes
Fast transient/
burst
IEC 801-4
(1988)
i/c, +i/–i
2000 Vp bursts of 5/50 ns
5 kHz rep. rate
50 Ω
1 min positive
1 min negative
bursts per
transients with
15 ms burst
coupling mode
duration and a
4000 Vp 300 ms period
2
1
4
4
Transient
IEC 801-5
i/c
4000 Vp
2000 Vp
1.2/50 µs
12 Ω
2 Ω
5 pos. and 5 neg. yes
impulses per
coupling mode
(Draft 1993-01)
+i/–i
2
Conducted
disturbance
IEC 801-6
(Draft1992-12)
3
i, o, signal wires 140 dBµV AM modulated 150 Ω
(10 Vrms 80%, 1 kHz
0.15...80 MHz
yes
)
1 Normal operation, no deviation from specifications
2 Normal operation, temporary deviation from specs possible
3 Will be replaced by EN 50155
units are available on customer's request. Standard DM units
(110 V battery) will not be damaged, but overvoltage lock-out
will occur during the surge
6 In correspondence with DIN 57435 part 303 and VDE 0435 part
303 (1984-09)
4 i = input, o = output, c = case
5 Only met with extended input voltage range of BM (24 V bat-
tery), CM (48 V battery) and EM (110 V battery) types. These
Edition 2/96 - © Melcher AG
7 - 13
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Electromagnetic Emissions
Table 13: Emissions at Ui nom and Io nom (LM/LMZ at 230 V AC)
Types
Level:
VDE 0871
6.78
VDE 0875 part 3
12.88
EN 55011, 1991 1
EN 55022, 1987 2
FCC: 47 CFR 15.xxx
15.107
15.103
≤ 30 MHz
≥30 MHz ≤ 30 MHz
≥30 MHz
≤ 30 MHz
≥30 MHz
≤ 30 MHz
≥30 MHz
AM 1000
AM 2000
AM 3000
B
B
B
B
B
A
N
N
N
K
K
K
B
B
B
B
B
A
B
B
B
B
B
A
BM 1000
BM 2000
BM 3000
B
B
B
B
B
A
N
N
N
K
K
K
B
B
B
B
B
A
B
B
B
B
B
A
CM 1000
CM 2000
CM 3000
B
B
B
B
B
A
N
N
N
K
K
K
B
B
B
B
B
A
B
B
B
B
B
A
DM 1000
DM 2000
DM 3000
B
B
B
B
B
A
N
N
N
K
K
K
B
B
B
B
B
A
B
B
B
B
B
A
EM 1000
EM 2000
EM 3000
B
B
B
B
B
A
N
N
N
K
K
K
B
B
B
B
B
A
B
B
B
B
B
A
FM 1000
FM 2000
FM 3000
A
A
A
B
B
A
N
N
N
K
K
K
B
B
B
B
B
A
A
A
A
B
B
A
LM 1000
LM 2000
LM 3000
B
B
B
B
B
A
N
N
N
K
K
K
B
B
B
B
B
A
B
B
B
B
B
A
CMZ 1000
CMZ 2000
CMZ 3000
B
-
>A
A
-
>A
N
-
G
K
-
G
B
-
A
A
-
>A
B
-
A
A
-
>A
DMZ 1000
DMZ 2000
DMZ 3000
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
LMZ 1000
LMZ 2000
LMZ 3000
>A
-
A
>A
-
>A
G
-
N
K
-
N
A
-
B
>A
-
>A
>A
-
A
>A
-
>A
1 Identical with CISPR 11 (1990-09) and VDE 0875 part 11 (1992-07)
2 Identical with CISPR 22 (1985) and VDE 0878 part 3 (1989-11)
[dBµV/m]
[dBµV]
100
100
90
90
80
70
60
50
40
30
20
10
80
A
70
60
B
50
40
30
20
10
0
A
B
0
Frequency [MHz]
Frequency [MHz]
Fig. 11a
Fig. 11b
Conducted RFI at input according to EN 55011 (quasi peak)
Radiated RFI according to EN 55011 (Distance 10 m)
7 - 14
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Supplementary Data
Important Advice
Isolation
Input to output electric strength tests, in accordance with
the safety standards IEC 950, EN 60950, VDE 0805 and
EN 41003 are performed as factory tests and should not be
repeated in the field.
Testing by applying AC voltages will result in high and
dangerous leakage currents through the Y-capacitors
(see fig. 1). Melcher will not honour any guarantee/war-
ranty claims resulting from high voltage field tests. Ref-
erence is also made to chapter: Safety and Installation
Instructions.
Table 14: Electric strength test voltage, insulation resistance, clearance and creepage distances
Characteristic
a) values according to IEC 950,
b) Product's performance
Input/Output
Input/Case
Class I
Input/Case
Class II
Output/Case Output/Output Unit
a) b)
a)
b)
a)
b)
a)
707
500
–
b)
a)
–
–
–
–
–
b)
300
200
–
Electric strength
test voltage
DC: 1 s
42431 56001 2122 2800 4243 5600
30001 40001 1500 2000 3000 4000
1414
1000
≥100
2.0
V
AC: 50 Hz, 1 min
at 500 V DC
AM/BM
Insulation resistance
–
≥300
5.0
–
≥300
4.0
–
≥300
5.0
MΩ
Clearance and
Creepage distances
4.0
4.0
2.0
2.0
4.0
4.0
1.0
1.0
0.9
0.9
mm
C...LM and C/D/LMZ
8.0
4.0
5.0
2.0
1 Only subassemblies performance in accordance with IEC 950
Leakage Currents in AC-DC operation
Leakage currents will flow due to internal leakage capa-
citances and RFI suppression Y-capacitors. The current
values are proportional to the mains voltage and nearly pro-
portional to the mains frequency and are specified at an in-
put condition of 264 V/50 Hz where phase, neutral and pro-
tective earth are correctly connected as required for class I
equipment. Under test conditions the leakage currents flow
through a measurement circuit, consisting of a 1500 Ω re-
sistance with a 150 nF capacitor connected in parallel. The
voltage drop across this element is measured and the cur-
rent value calculated from the measured voltage divided by
1500 Ω.
If inputs of M-units are connected in parallel, their individual
leakage currents are added.
+
+
LMZ 1000…LMZ 3000
–
LM 1000…LM 3000
–
connection to case
MD for earth
leakage current
MD for enclosure
leakage current
MD for output
MD for output
leakage current
leakage current
MD
1500 Ω
150 nF
Fig. 12
Definition of leakage currents and measurement proce-
V
dure by means of the measuring device MD
Table 15: Leakage currents
Characteristic
Class I (LM)
Class II (LMZ)
Unit
a) permissible according to IEC 950
b) value at 264 V, 50 Hz
a)
max
b)
max
a)
max
b)
max
Earth leakage current
Enclosure leakage current
Output leakage current
3.5
–
1.4
–
–
–
mA
0.25
0.25
0.03
0.15
0.25
0.005
Edition 2/96 - © Melcher AG
7 - 15
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Display Status of LEDs
Uo1 > 0.95…0.98Uo1 adj
Fig. 13
LEDs "OK" and "i" status versus input voltage
Conditions: Io ≤ Io nom, TC ≤ TC max, Uinh ≤ 0.8 V
Ui uv = undervoltage lock-out, Ui ov = overvoltage lock-out
OK
i
Ui
Ui uv Ui min
Ui max Ui ov Ui abs
Uo1 > 0.95…0.98Uo1 adj Uo1 < 0.95…0.98Uo1 adj
OK
Io L
LED "OK" and "Io L"status versus output current
Conditions: Ui min...Ui max, TC ≤ TC max, Uinh ≤ 0.8 V
Io
Io nom
IoL
i
i
LED "i"versus case temperature
TC
Conditions: Ui min...Ui max, Io ≤ Io nom, Uinh ≤ 0.8 V
TC max
TPTC threshold
Uinh threshold
LED "i"versus Uinh
Conditions: Ui min...Ui max, Io ≤ Io nom, TC ≤ TC max
Ui inh
+0.8 V
+2.4 V
+50 V
-50 V
LED off
LED Status undefined
LED on
Description of Options
Table 16: Survey of options
Option
–9
E
Function of Option
Characteristic
Extended operational ambient temperature range
Electronic inrush current limitation circuitry
TA = –40...71°C
Extended inrush current limitation for C/E/LM, C/LMZ
Adjustment range ±5% of Uo nom, excludes R input
Safe data signal output (D0...D9)
P 1
D 2
V2 3
A
Potentiometer for fine adjustment of output voltage
Input and/or output undervoltage monitoring circuitry
Input and/or output undervoltage monitoring circuitry
ACFAIL signal according to VME specifications (V0, V2, V3)
Test sockets at front panel for check of output voltage Uo internally measured at the connector terminals
Enhanced output to case electric strength test voltage 2000 V AC (standard: 1000 V AC)
H
F
Input fuse built-in inside case
Fuse not externally accessible
U
UL recognized full ambient temperature range
Full temperature range according to temperature suffix
1 Function R excludes option P and vice versa
3 Only available if main output voltage Uo1 = 5.1 V
2 Option D excludes option V and vice versa
Option -9 Extended temperature range
Option P Potentiometer
Option -9 extends the operational ambient temperature
range from –25...71°C (standard) to –40...71°C.The power
supplies provide full nominal output power with convection
cooling.
Optionally built-in multi-turn potentiometers provide an out-
put voltage adjustment range of minimum ±5% of Uo nom
and are accessible through holes in the front cover. Com-
pensation of voltage drop across connector and wiring be-
comes easily achievable. For output voltages Uo > Uo nom
the minimum input voltage according to "Electrical Input
Data" increases proportionally to Uo/Uo nom
,
Option A Test sockets
.
Test sockets (pin Ø = 2 mm, distance d = 5.08 mm) are lo-
cated at the front of the module. The output voltage is
sensed at the connector pins inside the module.
Note: Potentiometers are not recommended for mobile ap-
plications
Table 17: Configuration of option A and option P
Type of option
AM...LM/CMZ...LMZ 1000
AM...LM/CMZ...LMZ 2000
AM...LM/CMZ...LMZ 3000
Output 1
Output 1
Output 2
Output 1
Output 2
Output 3
Potentiometer1
Test sockets
yes
yes
yes
yes
yes
yes
no
no
no
yes
yes
no
1
AM...LM 1000 types equipped with option P do not provide the R input simultaneously, pins 14 and 17 are not connected.
7 - 16
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Option E Extended inrush current limitation
Available for C/E/LM and C/LMZ types.
monitoring). Option D6, externally adjustable via poten-
tiometer, is necessary to disable the converter at input volt-
ages below the actual service ranges, avoiding an exces-
sive input current when the input voltage is raised slowly
according to prETS 300132-2. Option D6 threshold level Ut i
+ Uh i (refer to description of option D) should be adjusted
to 36.0...40.5 V for 48 V DC nominal supply voltage (for 60
V DC systems, threshold should be set to 44.0...50.0 V
DC).The D output (pin 5) should be connected to the inhibit
(pin 2). For applications where potentiometers are not al-
lowed refer to option D9.
The standard version of the modules C/D/E/LM as well as
C/D/LMZ include a passive inrush current limitation in the
form of a NTC resistor.
For applications which require an extended inrush current
limitation, an active electronic circuit as shown in "Option E
block diagram" has been developed. Typical inrush current
waveforms of units equipped with this option are shown
below.
CM and CMZ units meet the CEPT/ETSI standards for
48 V DC supply voltage according to prETS 300132-2 if fit-
ted with option E combined with option D6 (input voltage
Table 18: Inrush current characteristics with option E
Characteristic
CM/CMZ
EM
LM/LMZ
Unit
CM/CMZ/EM at Ui = 110 V DC
LM/LMZ at Ui = 230 VAC
typ
6.5
22
max
8
typ
2.2
19
max
4
typ
6
max
10
Iinr p
tinr
Peak inrush current
A
Inrush current duration
30
30
35
50
ms
Precautions:
In order to avoid overload of the series resistor RI the on/off
switching cycle should be limited to 12 s if switched on/off
continuously. There should not be more than 10 start-up
cycles within 20 s at a case temperature of 25°C.
Control
If CM and CMZ types are driven by input voltages below
35 V DC or LM and LMZ types below 100 V AC, the maxi-
mum case temperature should be derated by 10 K or the to-
tal output power should be derated by 20%. EM, LM and
LMZ units driven by DC input voltages do not need to be
derated within the full specified input voltage range.
FET
Rectifier
(LM/LMZ types)
RS
Ci
RI
Fig. 14
Option E block diagram
Availability:
Option E is available for C/E/LM and CMZ/LMZ modules
with a nominal output power of 51 W maximum.
Ii [A]
Ii [A]
LM type
Ui = 230 V AC
Po = Po nom
12
Iinr p = Ui / (RS+RI)
6
4
10
Capacitor Ci
fully charged
Normal operation
(FET fully conducting)
CM type
Ui = 110 V DC
8
2
Po = Po nom
0
6
EM type
Ui = 110 V DC
Po = Po nom
Capacitor Ci
fully charged
-2
-4
-6
Normal operation
(FET fully conducting)
4
2
0
Ii = Po /Ui • η
t [ms]
t [ms]
0
t
0
10
20
30
40
20
tinr 40
60
80
inr
Fig. 16
Fig. 15
Typical inrush current waveforms of a CM and an EM type
Typical inrush current waveform of a LM type
Edition 2/96 - © Melcher AG
7 - 17
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Option D Undervoltage monitor
The input and/or output undervoltage monitoring circuit op-
erates independently of the built-in input undervoltage lock-
out circuit. A logic "low" (JFET output) or "high" signal (NPN
output) is generated at pin 5 as soon as one of the moni-
tored voltages drops below the preselected threshold level
Ut. The return for this signal is Vo1– (pin 23). The D output
recovers when the monitored voltage(s) exceed(s) Ut+Uh.
The threshold level Ut is either adjustable by a potentio-
meter, accessible through a hole in the front cover, or is fac-
tory adjusted to a fixed value specified by the customer.
Option D exists in various versions D0...D9 as shown in the
following table.
Table 19: Undervoltage monitor functions
Output type
JFET NPN
Monitoring
Minimum adjustment range
of threshold level Ut
Typical hysteresis Uh [% of Ut]
for Ut min...Ut max
Ui
Uo1
Uti
Uto
Uhi
Uho
2.3...1
–
D1
D2
D3
D4
D0
D5
D6
D7
D8
D9
no
yes
yes
no
yes
no
–
3.5 V...48 V 1
–
1
1
–
Ui min...Ui max
3.0...0.5
3.0...0.5
–
2
2
yes
yes
yes
no
Ui min...Ui max
0.95...0.98 Uo1
0.95...0.98 Uo1
3.5 V...48 V3
–
"0"
–
–
"0"
no
–
1.8...1
–
3 4
3 4
yes
yes
Ui min...Ui max
Ui min...Ui max
2.2...0.4
2.2...0.4
2
yes
0.95...0.98 Uo1
"0"
1 Threshold level adjustable by potentiometer (not recommended for mobile applications)
2 Fixed value between 95% and 98% of Uo1 (tracking)
3 Fixed value, resistor-adjusted according to customer's specifications ±2% at 25°C; individual type number is determined by Melcher
4 Adjusted at Io nom
JFET output (D0…D4):
Vi+
Vo1+
20
5
29
Connector pin D is internally connected via the drain-
source path of a JFET (self-conducting type) to the nega-
tive potential of output 1. UD ≤ 0.4 V (logic low) corresponds
to a monitored voltage level (Ui and/or Uo1) < Ut. The cur-
rent ID through the JFET should not exceed 2.5 mA. The
JFET is protected by a 0.5 W Zener diode of 8.2 V against
external overvoltages.
Rp
ID
D
U
D ≤ 6 V
Vi–
32
23
Ui, Uo1 status
Ui or Uo1 < Ut
D output, UD
Vo1–
low, L, UD ≤ 0.4 V at ID = 2.5 mA
high, H, ID ≤ 25 µA at UD = 5.25 V
Fig. 17
Ui and Uo1 > Ut + Uh
Options D0...D4, JFET output
NPN output (D5...D9):
Vi+
29
Vo1+
20
5
Connector pin D is internally connected via the collector-
emitter path of a NPN transistor to the negative potential of
output 1. UD < 0.4 V (logic low) corresponds to a monitored
voltage level (Ui and/or Uo1) > Ut + Uh. The current ID
through the open collector should not exceed 20 mA. The
NPN output is not protected against external overvoltages.
UD should not exceed 40 V.
Rp
ID
D
UD
Vi–
32
23
Ui, Uo1 status
Ui or Uo1 < Ut
D output, UD
Vo1–
high, H, ID ≤ 25 µA at UD = 40 V
low, L, UD ≤ 0.4 V at ID = 20 mA
Fig. 18
Ui and Uo1 > Ut + Uh
Options D5...D9, NPN output
7 - 18
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
UD
∆Uti
Uhi
Threshold tolerances and hysteresis:
If Ui is monitored, the internal input voltage after the input
filter and rectifier (E/LM and LMZ types) is measured. Con-
sequently this voltage differs from the voltage at the con-
nector pins by the voltage drop ∆Uti across input filter and
rectifier.The threshold level of the D0 and D9 options is fac-
tory adjusted at nominal output current Io nom and at TA =
25°C. The value of ∆Uti depends upon the input voltage
range (AM, BM, ...), threshold level Ut, temperature and in-
put current. The input current is a function of the input volt-
age and the output power.
UD high
P
P
P
P
P
P
UD low
Ui
Uti
Fig. 19
Definition of Uti, ∆Uti and Uhi (JFET output)
Input voltage monitoring
NPN
UD
UD high
3
3
3
3
UD low
0
t
ID
ID high
ID low
0
t
JFET UD
UD high
UD low
0
t
1
4
4
4
th
tlow min
tlow min
tlow min
thigh min
Uo1
Uo1 nom
1
th
1
0.95
t
t
0
Ui [V DC]
Uti +Uhi
Uti
0
Input voltage failure
Switch-on cycle
Input voltage sag
Switch-on cycle and subsequent
input voltage failure
Output voltage monitoring
NPN UD
2
UD high
UD low
0
t
t
ID
ID high
ID low
0
UD
JFET
UD high
UD low
0
t
t
1
2
3
See "El. output data", for hold-up time.
With output voltage monitoring the hold-up time th = 0
The D signal remains high if the D output is connected to
an external source.
4
tlow min
Uo1
Uo1 nom
Uto +Uho
Uto
4
tlow min = 40...200 ms, typically 80 ms
0
Output voltage failure
Fig. 20
Relationship between Ui, Uo1, UD, ID and Uo1/Uo nom versus time.
Edition 2/96 - © Melcher AG
7 - 19
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Option V ACFAIL signal (VME)
Formula for additional external input capacitor
2 • Po • (th + 0.3 ms) • 100
Available for units with Uo1 = 5.1 V. This option defines an
undervoltage monitoring circuit for the input or the input and
main output voltage equivalent to option D and generates
the ACFAIL signal (V signal) which conforms to the VME
standard. The low state level of the ACFAIL signal is speci-
fied at a sink current of IV = 48 mA to UV ≤ 0.6 V (open-col-
lector output of a NPN transistor).The pull-up resistor feed-
ing the open-collector output should be placed on the VME
backplane.
Ci ext = ––––––––––––––––––––– – Ci min
η • (Uti 2 – Ui min
)
2
where as:
Ci min = minimum internal input capacitance [mF], accord-
ing to the table below
Ci ext = external input capacitance [mF]
Po = output power [W]
η
th
= efficiency [%]
= hold-up time [ms]
After the ACFAIL signal has gone low, the VME standard
requires a hold-up time th of at least 4 ms before the 5.1 V
output drops to 4.875 V when the 5.1 V output is fully
loaded. This hold-up time th is provided by the internal input
capacitance. Consequently the working input voltage and
the threshold level Ut i should be adequately above the
minimum input voltage Ui min of the converter so that
enough energy is remaining in the input capacitance. If the
input voltage is below the required level, an external hold-
up capacitor (Ci ext) should be added.
Ui min = minimum input voltage [V]
Uti = threshold level [V]
Remarks:The threshold level Uti of option V2 and V3 is ad-
justed during manufacture to a value according to the table
below. A decoupling diode should be connected in series
with the input of A...D/FM converters to avoid the input ca-
pacitance discharging through other loads connected to the
same source voltage. If LM or LMZ units are AC powered,
an external input capacitor cannot be applied unless an ad-
ditional rectifier is provided.
Formula for threshold level for desired value of th:
2 • Po • (th + 0.3 ms) • 100
2
Uti = ––––––––––––––––––––– + Ui min
Ci min • η
Table 20: Available internal input capacitance and factory potentiometer setting of Ut i with resulting hold-up time
Types
Ci min
Ut i
AM
2.6
BM
0.67
19.5
0.69
FM
0.37
39
CM/CMZ
0.37
DM/DMZ
0.14
EM
0.14
104
6.69
LM/LMZ
0.14
Unit
mF
9.5
39
61
120
V DC
ms
th
0.34
2.92
1.92
1.73
8.18
voltage(s) exceed(s) Ut + Uh.The threshold level Ut is either
adjustable by a potentiometer, accessible through a hole in
the front cover, or is factory adjusted to a determined cus-
tomer specified value.
Option V operates independently of the built-in input under-
voltage lock-out circuit. A logic "low" signal is generated at
pin 5 as soon as one of the monitored voltages drops below
the preselected threshold level Ut.The return for this signal
is Vo1– (pin 23).The V output recovers when the monitored
Versions V0, V2 and V3 are available as shown below.
Table 21: Undervoltage monitor functions
V output
(VME compatible)
Monitoring
Minimum adjustment range
of threshold level Ut
Uti Uto
Typical hysteresis Uh [% of Ut]
for Ut min...Ut max
Ui
Uo1
no
Uhi
Uho
1
–
V2
V3
V0
yes
yes
yes
yes
Ui min...Ui max
Ui min...Ui max
3.0...0.5
3.0...0.5
2.2...0.4
2.2...0.4
-
1
2
2
yes
no
0.95...0.98 Uo1
"0"
-
3 4
Ui min...Ui max
Ui min...Ui max
-
3 4
yes
0.95...0.98 Uo1
"0"
1
2
Threshold level adjustable by potentiometer (not recommended for mobile applications).
Fixed value between 95% and 98% of Uo1
3
(tracking), output undervoltage monitoring is not a requirement of VME standard. Adjusted at Io nom
4
.
Fixed value, resistor-adjusted (±2% at 25°C) acc. to customer's specifications; individual type number is determined by Melcher.
V output (V0, V2, V3):
Connector pin V is internally connected to the open collec-
tor of a NPN transistor. The emitter is connected to the
negative potential of output 1. UV ≤ 0.6 V (logic low) corre-
sponds to a monitored voltage level (Ui and/or Uo1) < Ut.
The current IV through the open collector should not exceed
50 mA. The NPN output is not protected against external
overvoltages. UV should not exceed 80 V.
Vi+
Vo1+
29
20
5
Rp
IV
V
UV
Vi–
Ui, Uo1 status
Ui or Uo1 < Ut
V output, UV
23
32
Vo1–
low, L, UV ≤ 0.6 V at IV = 50 mA
high, H, IV ≤ 25 µA at UV = 5.1 V
Fig. 21
Output configuration of options V0, V2 and V3
Ui and Uo1 > Ut + Uh
7 - 20
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Threshold tolerances and hysteresis:
UV
∆Uti
Uhi
If Ui is monitored, the internal input voltage is measured af-
ter the input filter and rectifier (E/LM and LMZ types). Con-
sequently this voltage differs from the voltage at the con-
nector pins by the voltage drop ∆Ut i across input filter and
rectifier.The threshold level of option V0 is factory adjusted
at Io nom and TA = 25°C.The value of ∆Ut i depends upon the
input voltage range (AM, BM, ...), threshold level U ti, tem-
perature and input current. The input current is a function of
input voltage and output power.
UV high
P
P
P
P
P
P
UV
low
Ui
Uti
Fig. 22
Definition of Uti, ∆Uti and Uhi
Input voltage monitoring
2
2
2
tlow min
tlow min
tlow min
V2
UV
3
3
3
UV high
4
2
4
2
UV low
0
t
t
tlow min
tlow min
V3
UV
3
3
3
UV high
UV low
0
1
1
th
th
Uo1
5.1 V
4.875 V
2.0 V
0
t
Ui [V DC]
Uti + Uhi
Uti
t
0
Input voltage failure
Switch-on cycle
Input voltage sag
Switch-on cycle and subsequent
input voltage failure
Output voltage monitoring
V2 UV
UV high
4
4
UV low
0
2
tlow min
V3 UV
UV high
3
3
4
UV low
0
Uo1
5.1 V
4.875 V
2.0 V
0
1 VME request: minimum 4 ms
2 tlow min = 40...200 ms, typically 80 ms
Ui
3 UV level not defined at Uo1 < 2.0 V
4 The V signal drops simultaneously with the output voltage, if the
pull-up resistor RP is connected to Vo1+.The V signal remains
high if RP is connected to an external source.
Uti + Uhi
Uti
0
Output voltage failure
Fig. 23
Relationship between Ui, Uo1, UV, IV and Uo1/Uo nom versus time.
Edition 2/96 - © Melcher AG
7 - 21
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Option F Fuse not accessible
Option U UL Version
The standard M units have a fuseholder containing a 5 × 20
mm fuse which is externally accessible and to be found in
the back plate near the connector. Some applications re-
quire an inaccessible fuse. Option F provides a fuse
mounted directly onto the main PCB inside the case.
Underwriters Laboratories (UL) have approved the M se-
ries converters as recognized components up to an ambi-
ent temperature of TA max – 15 K given by the upper tem-
perature limit of the standard PCB material. If the full maxi-
mum ambient temperature TA max is required with UL ap-
proval, option U should be requested. It consists of an alter-
native PCB material with a higher maximum temperature
specification.
The full self-protecting functions of the module do normally
not lead to broken fuses, except as a result of inverse polar-
ity at the input of an A/B/C/D/FM or C/DMZ type or if a
power component inside fails (switching transistor, free-
wheeling diode, etc). In such cases the defective unit has to
be returned to Melcher for repair.
The European approval boards have in contrast accepted
the converters with the standard PCB material to be ope-
rated up to TA max without any further precautions.
Immunity to Environmental Conditions
Table 22: Mechanical stress
Test Method
Standard
Test Conditions
Ca
Ea
Eb
Fc
Damp heat
steady state
DIN 40046 part
IEC 68-2-3
MIL-STD-810D section 507.2
Temperature:
Relative humidity:
Duration:
40 ±2 °C
93 +2/-3
%
56 days
Unit not operating
Shock
(half-sinusoidal)
DIN 40046 part 7
IEC 68-2-27
MIL-STD-810D section 516.3
Acceleration amplitude:
Bump duration:
Number of bumps:
100 gn = 981 m/s2
6 ms
18 (3 each direction)
Unit operating
Continuous shock
(half-sinusoidal)
DIN 40046 part 26
IEC 68-2-29
MIL-STD-810D section 516.3
Acceleration amplitude:
Bump duration:
Number of bumps:
40 gn = 392 m/s2
6 ms
6000 (1000 each direction)
Unit operating
Vibration
(sinusoidal)
DIN 40046 part 8
IEC 68-2-6
MIL-STD-810D section 514.3
Frequency (1 Oct/min):
Maximum vibration amplitude:
Acceleration amplitude:
Test duration:
10...2000 Hz
0.35 mm (10...60 Hz)
5 gn = 49 m/s2
7.5 h (2.5 h each axis)
Unit operating
Fda
Kb
Random vibration
wide band
reproducibility high
DIN 40046 part 23
IEC 68-2-35
Acceleration spectral density:
Frequency band:
Acceleration magnitude:
Test duration:
0.05 g2/Hz
20...500 Hz
4.9 grms
3 h (1 h each axis)
Unit not operating
Salt mist
cyclic
(sodium chloride NaCl
solution)
DIN 40046 part 105
IEC 68-2-52
Concentration:
Duration:
Storage:
Storage duration:
Number of cycles:
5% (30°C)
2 h per cycle
40°C, 93% rel. humidity
22 h per cycle
3
Unit not operating
7 - 22
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Thermal considerations
Table 23: Temperature specifications, values given are for an air pressure of 800...1200 hPa (800...1200 mbar)
Characteristic
min
–25
–40
–25
–40
–40
–55
max
71
Unit
TA
TA
TC
TC
TS
TS
Standard operational ambient temperature range -7, (MIL-STD-810D sections 501.2 and 502.2)
°C
Extended operational ambient temperature range -9, (MIL-STD-810D sections 501.2 and 502.2)
Standard operational case temperature range -7, overtemp. lock-out (PTC) at TC > 95°C
Extended operational case temperature range -9, overtemp. lock-out (PTC) at TC > 95°C
Storage temperature range -7, (MIL-STD-810D sections 501.2 and 502.2)
71
95
95
100
100
Extended storage temperature range -9, (MIL-STD-810D sections 501.2 and 502.2)
Io nom [%]
Basically the available output power is limited by thermal
characteristics. Customer specific applications requiring
slightly higher output power, i.e. increased voltages or cur-
rents, are available on request. Usually the maximum ambi-
ent and case temperatures are reduced compared with
standard types. Operation at higher temperatures with
nominal output currents is also possible if forced cooling
can be provided (heat sink, fan, etc.).
110
100
90
Io nom (forced cooling)
Io nom
each output
(convection cooling)
80
70
60
50
40
30
20
10
0
Example: Sufficient forced cooling allowsTA max = 85°C. A
simple check of the case temperature TC (TC ≤ 95°C) at full
load ensures correct operation of the system (temperature
measurement point on the case see "Mechanical Data").
TC max
In general: For an ambient temperature of 85°C with only
convection cooling, the maximum permissible current for
each output is approx. 50% of it's nominal value for -7 or
-9 units as per figure.
TA [°C]
50
60
70
80
90
100
TA min
Fig. 24
Output derating versus ambient temperature under con-
vection and forced cooling conditions
Table 24: MTBF
Values at specified
Case Temperature
Module Types
Ground Benign
Ground Fixed
40°C 70°C
Ground Mobile
Unit
40°C
50°C
MTBF1
A...LM 1000 and C/D/LMZ 1000
A...LM 2000 and C/D/LMZ 2000
A...LM 3000 and C/D/LMZ 3000
320'000
255'000
225'000
130'000 40'000
105'000 32'000
80'000 28'000
35'000
28'000
25'000
h
Device hours 2
A...LM 1000 and C/D/LMZ 1000
A...LM 2000 and C/D/LMZ 2000
A...LM 3000 and C/D/LMZ 3000
880'000
720'000
740'000
1 Calculated in accordance with MIL-HDBK-217E (calculation according to edition F would show even better results)
2 Statistical values, based on an average of 4300 working hours per year and in general field use, over 3 years
Edition 2/96 - © Melcher AG
7 - 23
MELCHER
The Power Partners.
M-Family
DC-DC Converters <100 W
Rugged Environment
Mechanical Data
Dimensions in mm. Tolerances ±0.3 mm unless otherwise indicated.
European
Projection
Mounting holes for retaining clips V
Male connector H 11 according to DIN 41 612
(Gold plated contacts on customer's request)
34
100 ±0.6
Front plate
103
M 3; depth = 4 mm
(chassis mount)
Main face
Rear face
Measurement point for
case temperatureTC
22
Mounting plane of
connector H11
(11.6)
88
111.2 ±0.8
38.7
Back plate
94.5 ±0.1
95 ±0.5
22.30
17.25
12.17
7.09
0
OK (LED green)
IoL (LED red)
Inhibit i (LED red)
Potentiometer (option D)
or potentiometer (option V)
Test sockets (option A)
Potentiometer(s) (option P)
Note: Long case, elongated by 60 mm for 220 mm rack
Fig. 25
depth, is available on request.
Case M02, weight 770 g (approx.)
7 - 24
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <100 W
M-Family
Type Key and Product Marking
Type Key
C M Z 2 5 40 -7 E R P D V A H F U
Input voltage range Ui:
8...35 V DC ............... A
14...70 V DC ............... B
20...100 V DC ............... F
28...140 V DC .............. C
44...220 V DC .............. D
67...385 V DC ............... E1
85...264 V AC, 88...372 V DC .............. L
Family .............. M
Class II Equipment ............... Z
Blank .................
Number of outputs .......... 1...3
Output 1, Uo1 nom
:
5.1 V .......... 0...2
12 V ............... 3
15 V .......... 4...5
24 V ............... 6
other voltages .......... 7...8
48 V ............... 9
other specs for single output modules ...... 01...99
Output 2 and 3, Uo2 nom, Uo3 nom
:
5.1 V ...... 01...19
12 V ...... 20...39
15 V ...... 40...59
24 V ...... 60...69
other voltages for multiple output modules ...... 70...99
Ambient temperature range TA:
(operational)
–25…71°C .............. -7
–40…71°C .............. -9
customer specific ........ -0...-6
Output voltage control input (single output modules only) R2
Options:
Inrush current limitation (C/E/LM and C/LMZ only) ......... E
Potentiometers for fine adjustment of output voltages ..... P2
Save data signal (D0...D9, to be specified)..................... D3
ACFAIL signal (V0, V2, V3, to be specified) .................... V3
Output voltage test sockets.............................................. A
Increased electric strength test voltage (O/C)................. H
Input fuse built-in (not accessible) ................................... F
UL recognized component for TA max ............................... U
1 EM types upon custom specifications available
2 Feature R excludes option P and vice versa
3 Option D excludes option V and vice versa
Example:
CM 2540-7PD3A: DC-DC converter, input voltage range 28...140 V, providing output 1 with 15 V/1.7 A and
output 2 with 15 V/1.7 A; equipped with potentiometers, undervoltage monitor and test sockets.
Accessories: Front panels, female connectors, mounting facilities, etc. please refer to section "Accessories".
Product Marking (refer also to "Mechanical Data")
Main face:
Basic type designation, applicable safety approval and recognition marks, warnings, pin allocation, Melcher
patents and company logo.
Front plate: Identification of LEDs, optional test sockets and potentiometers.
Back plate: Specific type designation, input voltage range, nominal output voltage(s) and current(s), pin allocation of op-
tions and auxiliary functions, fuse specification and degree of protection.
Rear face:
Label with batch no., serial no. and data code comprising production site, modification status of the main
PCB, date of production. Confirmation of successfully passed final test.
Edition 2/96 - © Melcher AG
7 - 25
MELCHER
The Power Partners.
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