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ES-5211 Rev.7 MODEL Telemetering System TMA 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 MODEL & SUFFIX CODE SELECTION TMA– ❑ –❑ MODEL FUNCTION S :T ransmitter R : Receiver POWER INPUT AC Power DC Power B : 100V AC G : 200V AC S : 12V DC* C :1 10V AC H : 220V AC R : 24V DC* D :1 15V AC J : 240V AC F : 120V AC *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. ANALOG TELEMETERING MODULE P. 1 / 4 (1.97) 123 (4.84) (3.15) mm (inch) TMA M •UN IT M odel SPAN ZERO INPUT & OUTPUT ■ TRANSMITTER (model: TMA-S)
  • Input:1 – 5V DC For a current input, specify a resistance value to convert it into 1 – 5V when ordering. 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

ORDERING INFORMATION

Specify code number. (e.g. TMA-S-B) 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%

ES-5211 Rev.7 Specifications subject to change without notice. INSTALLATION Power input AC : operational voltage range: rating ±10%, 50/60 ±2 Hz, approx. 2VA DC : 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 Dimensions: W50×H80×D123 mm (1.97"×3.15"×4.84") W eight: 400 g (0.88 lbs) P. 2 / 4 PERFORMANCE in percentage of span Accuracy: ±0.1% 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) 2000V AC @1 minute (input to ground) 2000V AC @1 minute (output to ground) EXPLANATIONS ■ The TMA Telemetering Module provides 1 to 5mA DC current signal. The current signal has a high impedance of 5M Ω 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. TMA-S TMA-R TRANSMITTING POINT RECEIVING POINT EINPUT OUTPUT1kΩ r r 1 – 5mA DC 1 – 5mA DC ■ AVAILABLE NTT LINE Among the several circuit lines opened by NTT (Nip- pon Telephone & Telegraph), the TMA utilizes the “special DC line” of 50 b/s. The following shows the conditions to use this line. ■ LEADWIRE RESISTANCE 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 3k Ω is for about 30 kilometers. mm2 0.65 0.90Cable size mm2 1.25 2.00 Approx. Resistance (Ω/km; including return) 100 55 35 20 ITEM DATA Transmission speed 50 b/s max. Technical configuration 2-wire (metalic return) 4-wire (metalic return Communication Uni-directional, full-duplex Intersection Not allowed Circuit protection Required Electrical characteristics Current 45mA max. Voltage between lines 100V max. Voltage to ground 50V max.

ES-5211 Rev.7P. 3 / 4 INSTALLATION INSTRUCTIONS ■ LIGHTNING PROTECTION Long distance transmission system via cables are often 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 NTT do not meet to the protecting purpose of transmis- sion cable. ■ 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. 3 1 TMA-S 3 1 TMA-R 1 4 MA-100/200 S+ P+ MDP-24-1 G P+ S+ MDP-24-1 G INPUT OUTPUT POWER POWER 4 1

2 MA-100/200

(leased circuit) FUSE BOX LEASED CIRCUIT 50 bps REMOTELOCAL SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM Isolation Base Socket SZ *Input shunt resistor attached for current input. INPUT

3 Low Drift

U(+) V(–) POWER

ES-5211 Rev.7 Specifications subject to change without notice. EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENT mm (inch) 3456 2187 80 (3.15) 80 (3.15) (.79) 35.4 (1.39) 40 (1.57) 50 (1.97) 7.8 (.31) CLAMP (top & bottom) DIN RAIL 35mm wide 2–4.5 (.18) dia. MTG HOLE 15 (.59) deep 8–M3.5 SCREW

  • When mounting, no extra space is needed between units. P. 4 / 4 TERMINAL ASSIGNMENT mm (inch) 2187 12 (.47) INPUT RESISTOR (model: REM) Input shunt resistor attached for current input.