SF4D-DC12V [NAIS]
POLARISED, MONOSTABLE SAFETY RELAY; 极化，单稳态安全继电器
| 型号： | SF4D-DC12V |
| 厂家： | 
NAIS(MATSUSHITA ELECTRIC WORKS) |
| 描述： | POLARISED, MONOSTABLE SAFETY RELAY |
| 文件： | 总5页 (文件大小：245K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
(pending)
POLARISED, MONOSTABLE
SAFETY RELAY
SF-RELAYS
Double contact
FEATURES
25.0
.984
• High contact reliability
• Separated chamber structure (2 Form
A 2 Form B, 4 Form A 4 Form B)
N.O. and N.C. side contacts are put in
each own space surrounded with a card
and a body-separater.That prevents short
circuit between contacts, which is caused
by their springs welding or damaged.
• High breakdown voltage 2,500 Vrms
between contacts and coil
53.3±0.3
2.098±.012
High contact reliability is achieved through
the use of a double contact.
• Forced operation contacts
16.5±0.5
.650±.020
(2 Form A 2 Form B)
N.O. and N.C. side contacts are
connected through a card so that one
interacts with the other in movement. In
case of a contact welding, the other keeps
a min. 0.5mm .020inch contact gap.
• Independent operation contacts
(4 Form A 4 Form B)
There are 4 points of forced operation
contacts.
Each pair of contacts is free from the main
armature and is independent from each
other. So if a N.O. pair of contacts are
welded, the other 3 N.O. contacts are not
effected (operate properly) That enables
to plan a circuit to detect welding or go
back to the beginning condition.
2 Form A 2 Form B
33±0.5
1.299±.020
53.3±0.3
2.098±.012
• High sensitivity
16.5±0.5
.650±.020
Realizes thin shape and high sensitivity
(500 mW nominal operating power) by
utilizing high-efficiency polarized
magnetic circuit with 4-gap balanced
armature.
• Complies with safety standards
Standard products are UL, CSA, TÜV and
SEV certified. Comform to European
standards. TÜV certified (945/EL, 178/
88). Complies with SUVA European
standard.
4 Form A 4 Form B
mm inch
SPECIFICATIONS
Contact
Characteristics
2 Form A
2 Form B
4 Form A
4 Form B
2 Form A
2 Form B
4 Form A
4 Form B
Contact arrangement
Contact arrangement
Initial contact resistance, max.
(By voltage drop 6 V DC 1 A)
Max. operating speed
Initial insulation resistance*1
180 cpm (at nominal voltage)
Min. 1,000 MΩ at 500 V DC
1,300 Vrms
30 mΩ
Contact material
Gold-flashed silver alloy
Between open contacts
Initial
Nominal switching
capacity
breakdown Between contact sets
2,500 Vrms
6 A 250 V AC, 6 A 30 V DC
voltage*2
Between contact and coil
2,500 Vrms
Rating
(resistive)
Max. switching power
1,500 VA, 180 W
Operate time*3 (at nominal voltage)
Release time (without diode)*3
(at nominal voltage)
Approx. 17 ms Approx. 18 ms
Max. switching voltage
440 V AC, 30 V DC
Approx. 7 ms Approx. 6 ms
Max. carrying current
6 A
107
Expected
life (min.
operations)
Mechanical (at 180 cpm)
Electrical (at 20 cpm)
Max. 45°C
with nominal coil voltage and
at 6 A carry current
Temperature rise (at nominal voltage)
(at 20°C)
105
Functional*4
Shock resistance
Min. 294 m/s2 {30 G}
Min. 980 m/s2 {100 G}
Coil
Destructive*5
Nominal operating power
500 mW
10 to 55 Hz at double
amplitude of 2 mm
Remarks
Functional*6
Vibration resistance
* Specifications will vary with foreign standards certification ratings.
*1 Measurement at same location as “Initial breakdown voltage” section
*2 Detection current: 10mA
10 to 55 Hz at double
amplitude of 2 mm
Destructive
*3 Excluding contact bounce time
*4 Half-wave pulse of sine wave: 11ms; detection time: 10µs
*5 Half-wave pulse of sine wave: 6ms
Conditions for operation,
Ambient
–40°C to +70°C
–40°F to +158°F
transport and storage*7 (Not temp.
freezing and condensing at
*6 Detection time: 10µs
*7 Refer to 6. Usage, transport and storage mentioned in NOTES
Humidity
5 to 85% R.H.
low temperature)
Approx.
38 g 1.34 oz
Approx.
47 g 1.66 oz
Unit weight
4
ORDERING INFORMATION
TYPICAL APPLICATIONS
• Industrial equipment such as presses and machine tools
Ex. SF
2
D
DC 5 V
Contact arrangement
Coil voltage
DC 5, 12, 24, 48, 60 V
2: 2 Form A 2 Form B
4: 4 Form A 4 Form B
UL/CSA, TÜV, SEV approved type is standard
TYPES AND COIL DATA (at 20°C 68°F)
Nominal
operating
current,
Pick-up
voltage, VDC
(max.)
Drop-out
voltage, V DC
(min.)
Nominal
operating
power, mW
Contact
Nominal
Coil resistance
Ω (±10%)
Max.allowable
voltage, V DC
Part No.
arrangement
voltage, V DC
mA (±10%)
SF2D-DC5V
SF2D-DC12V
SF2D-DC24V
SF2D-DC48V
SF2D-DC60V
SF4D-DC5V
SF4D-DC12V
SF4D-DC24V
SF4D-DC48V
SF4D-DC60V
5
3.75
9
0.5
1.2
2.4
4.8
6.0
0.75
1.8
3.6
7.2
9.0
50
100
41.7
20.8
10.4
8.3
500
500
500
500
500
500
500
500
500
500
6
12
24
48
60
5
288
14.4
28.8
57.6
72
2 Form A
2 Form B
18
36
45
3.75
9
1.152
4.608
7.200
50
100
41.7
20.8
10.4
8.3
6
12
24
48
60
288
14.4
28.8
57.6
72
4 Form A
4 Form B
18
36
45
1.152
4.608
7.200
mm inch
DIMENSIONS
Schematic (Bottom view)
1. 2 Form A 2 Form B
5
6
7
8
1
2
16±0.5
.630±.020
9
10
11
12
0.5
.020
3.0±0.5
.118±.020
12.7
12.7
.500
12.7
.500
PC board pattern (Bottom view)
5.08
.200
.500
53.3±0.3
10-1.4 DIA. HOLES
2.098±.012
2.54
10-.055 DIA. HOLES
.100
2.54
.100
5
6
7
8
25.0
.984
1
2
12.7
.500
7.62
.300
9
10
11
12
General tolerance: ±0.3 ±.012
Tolerance: ±0.1 ±.004
Schematic (Bottom view)
2. 4 Form A 4 Form B
13 14 15 16
16±0.5
1
2
.630±.020
5
9
6
7
8
10 11 12
0.3
.012
3.0±0.5
12.7
.500
12.7
.500
12.7
.500
.118±.020
5.08
.200
17 18 19 20
53.3±0.3
2.098±.012
PC board pattern (Bottom view)
13
5
14
6
15
7
16
8
7.62
.300
18-1.4 DIA. HOLES
33±0.5
2.54
18-.055 DIA. HOLES
1.299±.020
.100
1
2
2.54
.100
12.7
.500
7.62
.300
9
17
10
18
11
19
12
20
7.62
.300
General tolerance: ±0.3 ±.012
Tolerance: ±0.1 ±.004
5
REFERENCE DATA
1. Operate/release time (without diode)
2. Temperature rise
3. Ambient temperature characteristics
Tested sample: SF2D-DC24V
Quantity: n = 20
Tested sample: SF4D-DC24V
Quantity: n = 6
Tested sample: SF4D-DC12V
Quantity: n = 6
Coil applied voltage: 100%V, 120%V
Contact carry current: 6A
30
50
40
100
50
25
Inside the coil
Drop-out voltage
Pick-up voltage
20
15
30
-40 -20
0
Operate time
20 40 60 80
Ambient
20
temperature, °C
10
Contact
Max.
x
-50
Min.
Release time
10
0
Max.
5
0
x
Min.
-100
70
80
90
100
110
120 130
100
110
120
Coil applied voltage, %V
Coil applied voltage, %V
6
THE OPERATION OF SF RELAYS (when contacts are welded)
SF relays work to maintain a normal operating state even when the contact welding occur by overloading or short-circuit
currents. It is easy to make weld detection circuits and safety circuits in the design to ensure safety even if contacts weld.
Internal Contacts Weld
If the internal contacts (No. 2, 3, 6, and 7) weld of 4a4b type, the armature becomes non-operational and the contact gaps of each of
the four form “a” contacts are maintained at greater than 0.5 mm .020 inch. Reliable isolation is thus ensured.The 2a2b type operates
in the same way.
No.8
No.7
No.1
No.2
No.8
No.7
No.1
No.2
If the No. 2 contact welds.
Each of the four form “a” contacts (No. 1, 3, 5,
and 7) maintains a gap of greater than 0.5 mm
.020 inch.
No.6
No.5
No.3
No.4
No.6
No.5
No.3
No.4
Non-energized
Energized (when no. 2 contact is welded)
External Contacts Weld
If the external contacts (No. 1, 4, 5, and 8) weld of 4a4b type, gaps of greater than 0.5 mm .020 inch are maintained between adjacent
contacts and the other contacts return by an non-energized.
No.8
No.7
No.1
No.2
No.8
No.7
No.1
No.2
If the No. 1 contact welds.
The adjacent No. 2 contact maintains a gap of
greater than 0.5 mm .020 inch. The other
contacts, because the coil is not energized,
return to their normal return state; each of
form “a” contacts (No. 3, 5, and 7) maintains a
contact gap of greater than 0.5 mm .020 inch;
each of the form “b” contacts (No. 4, 6, and 8)
return to a closed state.
No.6
No.5
No.3
No.4
No.6
No.5
No.3
No.4
Energized
Non-energized (when no. 1 contact is welded)
Weld
If external connections are made in series.
Even if one of the contacts welds, the other contacts
operate independently and the contact gaps are
maintained at greater than 0.5 mm .020 inch.
Energized
Contact gap
min 0.5 mm .020 inch
Non-energized
Contact Operation Table
The table below shows the state of the other contacts. In case of form “a” contact weld the coil applied voltage is 0 V.
In case of form “b” contact weld the coil applied voltage is nominal.
Contact No.
Contact No.
State of other contacts
1
2
3
4
5
6
7
8
No.8
No.7
No.1
No.2
1
2
3
4
5
6
7
8
>0.5 >0.5
>0.5
≠
>0.5
>0.5
≠
>0.5
>0.5
≠
>0.5: contact gap
is kept at min. 0.5
mm .020 inch
≠: contact closed
Empty cells: either
closed or open
>0.5
>0.5
>0.5
>0.5
>0.5
>0.5
>0.5
≠
No.6
No.5
No.3
No.4
Welded
contact
No.
≠
>0.5 >0.5
≠
>0.5
≠
≠
>0.5
>0.5
≠
>0.5
>0.5
≠
>0.5 >0.5
>0.5
Contact No. No.1 No.2 No.3 No.4 No.5 No.6 No.7 No.8
>0.5
>0.5
>0.5
>0.5
>0.5
>0.5
Terminal No. 20–19 12–11 8–7 16–15 13–14 5–6 9–10 17–18
≠
≠
>0.5 >0.5
Note: Contact gaps are shown at the initial state.
If the contact transfer is caused by load switching, it is necessary to check the actual loading.
7
NOTES
1. Coil operating power
(2) High-frequency load-operating
When high-frequency opening and
closing of the relay is performed with a
load that causes arcs at the contacts,
nitrogen and oxygen in the air is fused by
the arc energy and HNO3 is formed. This
can corrode metal materials.
The humidity range varies with the
temperature. Use within the range
indicated in the graph below.
Pure DC current should be applied to the
coil.The wave form should be rectangular.
If it includes ripple, the ripple factor should
be less than 5%. However, check it with
the actual circuit since the characteristics
may be slightly different.
Humidity, %R.H.
85
2. Coil connection
Three countermeasures for these are
listed here.
1. Incorporate an arc-extinguishing
circuit.
2. Lower the operating frequency
3. Lower the ambient humidity
Tolerance range
When connecting coils, refer to the wiring
diagram to prevent mis-operation or
malfunction.
(Avoid freezing when
used at temperatures
lower than 0°C 32°F)
(Avoid
condensation when
used at temperatures
higher than 0°C 32°F)
3. Cleaning
For automatic cleaning, the boiling
method is recommended.Avoid ultrasonic
cleaning which subjects the relays to high
frequency vibrations, which may cause
the contacts to stick.
It is recommended that a fluorinated
hydrocarbon or other alcoholic solvents
be used.
5
3) For secure operations, the voltage
applied to the coil should be nominal
voltage. In addition, please note that pick-
up and drop-out voltage will vary
according to the ambient temperature and
operation conditions.
4) Heat, smoke, and even a fire may occur
if the relay is used in conditions outside of
the allowable ranges for the coil ratings,
contact ratings, operating cycle lifetime,
and other specifications. Therefore, do
not use the relay if these ratings are
exceeded. Also, make sure that the relay
is wired correctly.
5) Incorrect wiring may cause unexpected
events or the generation of heat or flames.
6) Check the ambient conditions when
storing or transporting the relays and
devices containing the relays. Freezing or
condensation may occur in the relay,
causing functional damage. Avoid
subjecting the relays to heavy loads, or
strong vibration and shocks.
–40
0
+70
+158
–40
+32
Temperature, °C °F
(3) Atmospheric pressure: 86 to 106 kPa
Temperature and humidity range for
usage, transport, and storage:
2) Condensation
Condensation forms when there is a
sudden change in temperature under high
temperature and high humidity conditions.
Condensation will cause deterioration of
the relay insulation.
4. Soldering
We recommend the following soldering
conditions
1) Automatic soldering
1) Preheating: 100°C 212°F, max. 60 s
2) Soldering: 250°C 482°F, max. 5 s
5. Others
3) Freezing
Condensation or other moisture may
freeze on the relay when the
1) If the relay has been dropped, the
appearance and characteristics should
always be checked before use.
2) The cycle lifetime is defined under the
standard test condition specified in the
JIS* C 5442-1986 standard (temperature
15 to 35°C 59 to 95°F, humidity 25 to
85%). Check this with the real device as it
is affected by coil driving circuit, load type,
activation frequency, activation
phase,ambient conditions and other
factors.
Also, be especially careful of loads such
as those listed below.
(1) When used for AC load-operating and
the operating phase is synchronous.
Rocking and fusing can easily occur due
to contact shifting.
temperatures is lower than 0°C 32°F.This
causes problems such as sticking of
movable parts or operational time lags.
4) Low temperature, low humidity
environments
The plastic becomes brittle if the relay is
exposed to a low temperature, low
humidity environment for long periods of
time.
6. Usage, transport and storage
conditions
1) Ambient temperature, humidity, and
atmospheric pressure during usage,
transport, and storage of the relay:
(1) Temperature:
–40 to +70°C –40 to +158°F
(2) Humidity: 5 to 85% RH
(Avoid freezing and condensation.)
2/19/2003
All Rights Reserved, © Copyright Matsushita Electric Works, Ltd.
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