MEXB MSYSTEM | Alldatasheet

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Technical content

MODEL: MEX-B MEX-B SPECIFICATIONS ES-4614 Rev.10 Page 1/3 http://www.m-system.co.jp/ Final Control Elements VALVE POSITIONER (potentiometert feedback; built-in SSR) Functions & Features

  • Controlling an electric actuator powered with 100 V AC
  • Feedback potentiometer 100 Ω – 10 kΩ
  • Built-in SSR directly drives an AC motor
  • Timer for motor's overheat protection
  • Re-transmitted output Typical Applications
  • Single phase AC motor
  • Loop powered isolator can be used for isolating between setpoint input signal and transmitter output signal (1.97) 136 (5.35) (3.15) mm (inch) MODEL: MEX–B–[1][2]

ORDERING INFORMATION

  • Code number: MEX-B-[1][2] Specify a code from below for each of [1] and [2]. (e.g. MEX-B-B/Q)
  • Specify the specification for option code /Q (e.g. /C01/BD/S01) [1] POWER INPUT AC Power B: 100 V AC C: 110 V AC D: 115 V AC F: 120 V AC G: 200 V AC H: 220 V AC J: 240 V AC [2] OPTIONS blank: none /Q: With options (specify the specification) SPECIFICATIONS OF OPTION: Q (multiple selections) COATING (For the detail, refer to M-System's web site.) /C01: Silicone coating /C02: Polyurethane coating /C03: Rubber coating Optional Process /BD: Bonding TERMINAL SCREW MATERIAL /S01: Stainless steel GENERAL SPECIFICATIONS Construction: Plug-in Connection: M3.5 screw terminals Screw terminal: Chromated steel (standard) or stainless steel Housing material: Flame-resistant resin (black) Deadband adjustment: 2 – 20 % (front) Timer adjustment: 1 – 30 sec. (front) Isolation: Input or xmtr output to output to power Zero adjustment: 0 – 25 % (front) Span adjustment: 75 – 100 % (front) INPUT SPECIFICATIONS ■ Setpont Signal: 4 – 20 mA DC; input resistor incorporated Input resistance: 100 Ω ■ Feedback Potentiometer: 100 Ω – 10 kΩ Minimum span: 50 % of total resistance Excitation: 0.5 V DC OUTPUT SPECIFICATIONS ■ Re-Transmitted Output: 4 – 20 mA DC Load resistance: 750 Ω max. ■ Control Output: SSR (zero-crossing); 60 – 280 V AC @ 0.1 – 1 A Note 1: The incorporated SSR is not capable for driving 200 V AC motor. Note 2: When driving relays with this control output, relays may operate erratically due to the leakage current at OFF of SSR. To avoid the problem, install a resistor (R) in parallel with the relay coil. R < [Release Voltage] ÷ [[Leakage Current at OFF] – [Release Current]] Leakage current at OFF: Approx. 10 mA @ 240 V (2-3)ON to min. (1-3)ON to max. Deviation (Setpoint) – (Feedback) Deadband
  • Output Operation (terminal No. in parentheses)

MODEL: MEX-B MEX-B SPECIFICATIONS ES-4614 Rev.10 Page 2/3 http://www.m-system.co.jp/ INSTALLATION Power input

  • AC: Operational voltage range: rating ±10 %, 50/60 ±2 Hz, approx. 3 VA Operating temperature: -5 to +60°C (23 to 140°F) Operating humidity: 30 to 90 %RH (non-condensing) Mounting: Surface or DIN rail Weight: 300 g (0.66 lb) PERFORMANCE in percentage of span Position conversion accuracy: ±0.5 % Insulation resistance: ≥ 100 MΩ with 500 V DC Dielectric strength: 1000 V AC @ 1 minute (input or xmtr output to output to power)

2000 V AC @ 1 minute (input or xmtr output or output or

power to ground) EXTERNAL VIEW Span Adj. Zero Adj. Deadband Adj. Timer Adj. EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch) 5678 2111 10 80 (3.15) 80 (3.15) (.79) 40 (1 .57) 50 (1 .97) 7 .8 (.31) CLAMP (top & bottom) DIN RAIL 35mm wide2–4.5 (.18) dia. MTG HOLE 25 (.98) deep 11 –M3.5 SCREW

  • When mounting, no extra space is needed between units.

MODEL: MEX-B MEX-B SPECIFICATIONS ES-4614 Rev.10 Page 3/3 http://www.m-system.co.jp/ SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM Ref. Volt. Generator Voltage Amplifier SSR SSR5 U V Amplifier Base Socket SZ AC MOTOR POWER Output Driver Timer Compa- rator min. max. FEEDBACK POT max. min. 100Ω DEADBAND ADJ. TIMER SETPOINT RE-TRANSMITTED OUTPUT M EXPLANATIONS OF TERMS

  • SSR (Solid State Relay) Composed only of semiconductor parts, SSR is free from arc discharge or chattering which is typical with electromagnetic relays. It features excellent characteristics against vibration, physical impact or other environmental conditions.
  • Zero-Cross Function SSR with zero-cross function turns on when AC power voltage is near zero, creating delay of switching when input is provided in the middle of an wave cycle, thus limiting transient switching noise voltage and rush current.
  • Bonding An silicone adhesive reinforces the part, which is sensitive to vibration, on PWB. The improvement of vibration performance is not assured. Specifications are subject to change without notice.