MEXF

MEXF MSYSTEM | Alldatasheet

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Technical content

MODEL: MEX-F MEX-F SPECIFICATIONS ES-4623 Rev.7 Page 1/5 http://www.m-system.co.jp/ Final Control Elements VALVE POSITIONER Functions & Features

• I/I positioner for proportional valve position control in combination with electric actuator (100 V AC)
• Driving directly AC motor by solid state relay output
• Potentiometer or current feedback selectable
• Timer preventing frequent ON-OFF operation, protecting motor from overheating
• Retransmitted output standard 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–F–[1][2][3][4]1–[5][6]

ORDERING INFORMATION

• Code number: MEX–F–[1][2][3][4]1–[5][6] Specify a code from below for each of [1] through [6]. (e.g. MEX-F-11111-B/B/Q)
• Specify the specification for option code /Q (e.g. /C01/S01/SET) [1] OPERATION MODE SELECTOR 1: With 0: Without [2] POSITION SETPOINT INPUT 1: 4 – 20 mA DC (Input resistance 100 Ω) 2: 1 – 5 V DC (Input resistance 200 kΩ min.) 3: 4 – 12 mA DC (Input resistance 100 Ω) 4: 12 – 20 mA DC (Input resistance 100 Ω) For switching direct/reverse actions with split ranges, select "With" for Operation Mode Selector. [3] POSITION FEEDBACK INPUT 1: Potentiometer 2: Current [4] CONTROL OUTPUT 1: SSRs incorporated 2: Constant current driving external SSRs 3: 24 V AC dry contact RE-TRANSMITTED OUTPUT 1: 4 – 20 mA DC [5] 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 DC Power R: 24 V DC [6] OPTIONS (multiple selections) Brake Function blank: Without /B: With (incorporated SSRs control output type only) Signal Indicator blank: Without /E: Front-mounted LCD meter (with operation mode selector type only) Other Options blank: none /Q: Option other than the above (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 TERMINAL SCREW MATERIAL /S01: Stainless steel EX-FACTORY SETTING /SET: Preset according to the Ordering Information Sheet (No. ESU-4623)

MODEL: MEX-F MEX-F SPECIFICATIONS ES-4623 Rev.7 Page 2/5 http://www.m-system.co.jp/ 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); 5 sec. minimum with breaking function Isolation: Setpoint input or xmtr output or feedback input to control output to power (For external SSRs control output, non-isolated between control output and setpoint input etc.) Zero adjustment (front) Potentiometer feedback: 0 – 25 % Current feedback: -10 – +10 % Span adjustment (front) Potentiometer feedback: 75 – 100 % Current feedback: 90 – 110 % Operation mode: Front-accessed DIP switches; failsafe operation (full-open, full-closed or stop) when there is no position input signal (approx. -12.5 %); direct/reverse re- transmitted output; direct/reverse control action Electronic limit: Front-accessed potentiometers provided for Operation Mode Selector type

• Zero limit: Approx. -10 – +5 %
• Span limit: Approx. 95 – 110 % Breaking function: Dynamic brake (applicable with 100 to

120 V AC motor only)

LCD meter: Indicating re-transmitted output signal; 0.1 % increments INPUT SPECIFICATIONS ■ Setpoint Input Input resistor: Attached to input terminals (0.5 W) ■ POSITION FEEDBACK INPUT

• Current: 4 – 20 mA DC Input resistance: 20 Ω
• Feedback Potentiometer: 100 Ω – 10 kΩ Minimum span: 50 % of total resistance Excitation: 0.4 V DC OUTPUT SPECIFICATIONS ■ Re-Transmitted Output: 4 – 20 mA DC Load resistance: 750 Ω max. ■ Control Output
• SSR: Zero-cross fucntion; 80 – 264 V AC @ 0.1 – 1 A The built-in SSR cannot drive 200 V AC motor (direct/reverse). Leakage current at OFF: Approx. 10 mA @ 240 V Remark: 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]) Output Operation: Refer to the figure at the end of this section. ■ Constant Current Rating: 10 V DC, 10 mA ±10 % at ON; 0 mA at OFF Output Operation: Refer to the figure at the end of this section.
• 24 V AC Dry Contact Drive: Photo MOSFET relay Rating: 27 V AC/DC @ 1 A Leakage current at OFF: 1 mA @ 30 V AC Output Operation: Refer to the figure at the end of this section (2-3)ON to min. (1-3)ON to max. Deviation (Setpoint) – (Feedback) Deadband
• Output Operation (terminal No. in parentheses) INSTALLATION Power input
• AC: Operational voltage range: rating ±10 %, 50/60 ±2 Hz, approx. 3 VA
• DC: Operational voltage range: 24 V ±10 %, approx. 120 mA (ripple 10 %p-p max.) 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 % Re-transmitted output accuracy: ≤ 3 % excluding offset and deadband Insulation resistance: ≥ 100 MΩ with 500 V DC Dielectric strength: 2000 V AC @ 1 minute (setpoint input or xmtr output or feedback input to control output to power to ground) (For external SSRs control output, non-isolated between control output and setpoint input etc.)

MODEL: MEX-F MEX-F SPECIFICATIONS ES-4623 Rev.7 Page 3/5 http://www.m-system.co.jp/ EXTERNAL VIEW Front Cover (open) Mode Selector Span Adj. Zero Adj. Deadband Adj. Timer Adj. Electronic Limit Span Adj. Electronic Limit Zero Adj. LCD Meter EXTERNAL DIMENSIONS 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. TERMINAL ASSIGNMENTS unit: mm (inch) 2111 10 12 (.47) INPUT RESISTOR (model: REM) Input shunt resistor attached for current input.

MODEL: MEX-F MEX-F SPECIFICATIONS ES-4623 Rev.7 Page 4/5 http://www.m-system.co.jp/ SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM 3-PHASE SSR 3-PHASE SSR max. 3-PHASE MOTOR M U V W min. U(+) V(–) Amplifier Control Output Driver Base Socket SZ POWER Output Driver Timer Compa- rator Position Detector DEAD- BAND ADJ. TIMER Input Dir. / Rev. Selector No Input Detector Feedback Dir. / Rev. Selector Constant Curent SZ Voltage Amplifier FEEDBACK 20 Ω Electronic Limiter SZ * **Option /B R RE-TRANSMITTED OUTPUT SETPOINT A AC MOTOR min. max. FEEDBACK POT max. min. CONTROL OUTPUT POSITION FEEDBACK INPUT Break SSR Input shunt resistor attached for current input. Option /E Operation Mode Selector Control Output Examples

• External SSR Drive
• Incorporated SSR
• 24V AC Dry Contact Position Feedback Input Examples Resist/ Voltage Converter
• Potentiometer Feedback SZ SSR or Photo MOSFET Relay •Current Feedback M

MODEL: MEX-F MEX-F SPECIFICATIONS ES-4623 Rev.7 Page 5/5 http://www.m-system.co.jp/ SIGNAL CHARACTERISTICS & DIRECT/REVERSE ACTIONS OUTPUT MAX (100%) MIN (0%) 4 (0%) (100%) RE-TRANSMITTED OUTPUT 1 2

• RE-TRANSMITTED OUTPUT & CONTROL OUTPUT OUTPUT MAX (100%) MIN (0%) 4 (0%) (100%) POSITION SETPOINT INPUT 1 2
• POSITION SETPOINT INPUT & CONTROL OUTPUT SETTING G RAPH O PERATION Reverse 2 When the position setpont signal increases, Action the control output goes towared maximum side. Direct 1 When the position setpoint signal increases, Action the control output goes toward minimum side. The positioner is factory set to "Reverse" control action. Specify "Operation Mode Selector" type (code 1) when ordering, if changing out- put action to "Direct". SETTING G RAPH O PERATION Reverse 2 When the control output goes toward maximum Action side , the re-transmitted signal increases. Direct 1 When the control output goes toward maximum Action side , the re-transmitted signal decreases. The positioner is factory set to "Reverse" control action. Specify "Operation Mode Selector" type (code 1) when ordering, if changing out- put action to "Direct". 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.
• Photo MOSFET Relay A kind of semiconductor relay which has advantages of both solid state relay and mechanical relay, thanks to its low ON- resistance characteristic. It also features high speed ON/OFF operation and low leak current. Specifications are subject to change without notice.