TMA-R-B [MSYSTEM]
ANALOG TELEMETERING MODULE;
| 型号： | TMA-R-B |
| 厂家： | 
M-SYSTEM |
| 描述： | ANALOG TELEMETERING MODULE |
| 文件： | 总4页 (文件大小：59K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Telemetering System
MODEL
ANALOG TELEMETERING MODULE
TMA
MODEL & SUFFIX CODE SELECTION
50
(1.97)
TMA–❑–❑
MODEL
80
FUNCTION
M
•U
N
l
IT
(3.15)
M
o
d
e
TMA
S : Transmitter
R : Receiver
POWER INPUT
ZERO
SPAN
123
(4.84)
AC Power
DC Power
S : 12V DC*
R : 24V DC*
mm (inch)
B : 100V AC
C : 110V AC
D : 115V AC
F : 120V AC
G : 200V AC
H : 220V AC
J : 240V AC
Functions & Features
• Transmitting 1-point analog signal (water level,
pressure, flow or ingredients analysis) through NTT
(Nippon Telephone & Telegraph) personal telecom-
munication line of 50 b/s • Both transmitter (TMA-
S) and receiver (TMA-R) modules are approved of
Technical Requirements Compliance Approval by
Japan Approval Institute for Telecommunications
Equipment • Approval No. M90-N239-0 (TMA-S),
M90-N240-1 (TMA-R) • No interference by induc-
tion noise • Output circuit isolated from input and
power circuits • Compact plug-in construction easy
to install and maintain
*24V DC (Code R) and 12V DC (Code S) are not ap-
proved by Japan Approvals Institute for Telecommu-
nications Equipment.
Therefore an individual application will be necessary
for using the TMA on NTT telecom. line.
ORDERING INFORMATION
INPUT & OUTPUT
Specify code number. (e.g. TMA-S-B)
❑TRANSMITTER (model: TMA-S)
•Input:
1 – 5V DC
For a current input, specify a resistance
value to convert it into 1 – 5V when
ordering.
GENERAL SPECIFICATIONS
Construction: plug-in
Connection: M3.5 screw terminals
Housing material: flame-resistant resin (black)
Isolation: input to output to power
Front adjustments: zero and span; ±5%
Input resistance: 1MΩ minimum
•Output: 1 – 5mA DC
Load resistance: 3kΩ maximum
❑RECEIVER (model: TMA-R)
•Input:
1 – 5mA DC
Shunt resistor attached to input termi-
nals (included in the product package)
Input resistance: 10Ω
•Output: 4 – 20mA DC
Load resistance: 750Ω maximum
P. 1 / 4
ES-5211 Rev.7
TMA
INSTALLATION
PERFORMANCE in percentage of span
Power input
Accuracy: ±0.1%
AC:
DC:
operational voltage range: rating ±10%,
Temp. coefficient: ±0.015%/°C (±0.008%/°F)
Response time: ≤0.5 seconds (0 – 90%)
Line voltage effect: ±0.1% over voltage range
Insulation resistance: ≥100MΩ with 500V DC
Dielectric strength: 1000V AC @1 minute
(input to output to power)
50/60 ±2 Hz, approx. 2VA
operational voltage range: rating ±10%
(ripple 10% p-p max.)
approx. 80mA at 24V
approx. 160mA at 12V
Operating temperature: -5 to +60°C (23 to 140°F)
Operating humidity: 30 to 90% RH (non-condensing)
Mounting: surface or DIN rail
2000V AC @1 minute (input to ground)
2000V AC @1 minute (output to ground)
Dimensions: W50×H80×D123 mm (1.97"×3.15"×4.84")
Weight:
400 g (0.88 lbs)
EXPLANATIONS
❑The TMA Telemetering Module provides 1 to 5mA DC current signal. The current signal has a high impedance
of 5MΩ and thus the signal level is not affected by leadwire resistance of cable connected to the receiving
instrument, the receiving resistor receives a current signal proportional to the input signal 1 to 5V DC.
The current varies only by 0.02% (=1kΩ / 5MΩ) when the leadwire resistance value changes from 0Ω to 1kΩ.
TRANSMITTING
POINT
RECEIVING
POINT
1 – 5mA DC
1 – 5mA DC
r
r
3
4
1
2
3
4
1
2
INPUT
E
1kΩ
OUTPUT
TMA-S
TMA-R
❑AVAILABLE NTT LINE
❑LEADWIRE RESISTANCE
Among the several circuit lines opened by NTT (Nip-
pon Telephone & Telegraph), the TMA utilizes the
“special DC line” of 50 b/s.
Most popular wire size among the cables for city
telecommunication lines is that of 0.65 mm diameter.
This wire has about 100Ω of leadwire resistance for 1
kilometer with return, thus 3kΩ is for about 30
kilometers.
The following shows the conditions to use this line.
ITEM
DATA
mm2
mm2
0.65
0.90
Transmission speed
Technical configuration
50 b/s max.
Cable size
1.25
35
2.00
20
2-wire (metalic return)
4-wire (metalic return
Approx. Resistance
(Ω/km; including return)
100
55
Communication
Intersection
Uni-directional, full-duplex
Not allowed
Circuit protection
Required
Electrical characteristics Current 45mA max.
Voltage between lines 100V max.
Voltage to ground 50V max.
Specifications subject to change without notice.
P. 2 / 4
ES-5211 Rev.7
INSTALLATION INSTRUCTIONS
❑LIGHTNING PROTECTION
❑CABLE RESISTANCE OF NTT SPECIAL LINE
Check that cable resistance (including return) of the
NTT special line is within 3kΩ. In general, it is around
1kΩ and does not cause any problem.
Longdistancetransmissionsystemviacablesareoften
destroyed by inductive surge of lightning. In order to
prevent lightning surges entering through power sup-
ply line and signal line, proper procedure will be
required. Specify M-System's special lightning ar-
rester M-RESTER for this purpose. Fuses provided by
NTTdonotmeettotheprotectingpurposeoftransmis-
sion cable.
FUSE BOX
MDP-24-1
TMA-S
MDP-24-1
MDP-24-1
TMA-R
+
INPUT
–
+
OUTPUT
–
S+
S–
P+
P–
3
4
1
2
7
8
P+
P–
S+
S–
S+
S–
P+
P–
3
4
1
2
7
8
G
G
G
TELEPHONE LINE
(leased circuit)
4
5
1
8
POWER
2
MA-100/200
MA-100/200
+
POWER
–
1
8
4
5
2
LEASED CIRCUIT
50 bps
LOCAL
REMOTE
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM
Z
S
Isolation
Low Drift
Amplifier
Output
Driver
+
–
+
–
3
4
5
6
1
2
7
8
*
INPUT
R
OUTPUT
POWER
U(+)
V(–)
Base Socket
*Input shunt resistor attached for current input.
P. 3 / 4
ES-5211 Rev.7
TMA
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENT mm (inch)
CLAMP
(top & bottom)
7.8 (.31)
DIN RAIL
35mm wide
6
5
4
3
2–4.5 (.18) dia.
MTG HOLE
15 (.59) deep
7
8
1
2
8–M3.5
SCREW
50 (1.97)
103 (4.06)
123 (4.84)
40 (1.57)
50 (1.97)
[3.3 (.13)]
•When mounting, no extra space is needed between units.
TERMINAL ASSIGNMENT mm (inch)
INPUT RESISTOR
(model: REM)
6
5
4
3
7
8
1
2
Input shunt resistor attached
for current input.
Specifications subject to change without notice.
P. 4 / 4
ES-5211 Rev.7
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