MODEL: MEX-M1

MEX-M1 SPECIFICATIONS

ES-4622 Rev.6 Page 1/3

http://www.m-system.co.jp/

Final Control Elements

VALVE POSITIONER

Functions & Features

• Valve positioner for proportional valve position control in

combination with an electric actuator

• High accuracy positioning by employing reverse-phase

breaks

• Solid state relay output

• Potentiometer feedback

• Timer preventing frequent ON-OFF operations, protecting

the motor from overheating

50

(1.97)

136

(5.35)

80

(3.15)

mm (inch)

MODEL: MEX–M1–[1]1–K[2]

ORDERING INFORMATION

• Code number: MEX-M1-[1]1-K[2]

Specify a code from below for each [1] and [2].

(e.g. MEX-M1-61-K/B/Q)

• Specify the specification for option code /Q

(e.g. /C01/S01)

[1] POSITION SETPOINT INPUT

Current

A: 4 – 20 mA DC (Input resistance 250 Ω)

Voltage

6: 1 – 5 V DC (Input resistance 200 kΩ min.)

POSITION FEEDBACK INPUT

1: Potentiometer

POWER INPUT

AC Power

K: 85 – 132 V AC

(Operational voltage range 85 – 132 V, 47 – 66 Hz)

[2] OPTIONS (multiple selections)

Brake Function

blank: Without

/B: Reverse phase brake

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

GENERAL SPECIFICATIONS

Construction: Plug-in

Operation mode: Front-accessed DIP siwthces; direct or

reverse operation; failsafe operation when there is no

position input signal (full-open, full-closed or stop)

Connection: M3.5 screw terminals

Screw terminal: Chromated steel (standard) or stainless

steel

Housing material: Flame-resistant resin (black)

Deadband adj. (control output): 0.25 – 4 % (front)

Restart limiting timer: Approx. 1.5 seconds

Lock protection timer: Power supply to the motor is stopped

when the feedback signal does not enter to deadband for

approx. 2 minutes; reset by power off or by repeating 0 %

and 100 % setpoint input.

Isolation: Input or xmtr output to output or power

Zero adjustment: 0 – 25 % (front)

Span adjustment: 50 – 100 % (front)

INPUT SPECIFICATIONS

■ Setpoint Input

Input resistor: Attached to input terminals (0.5 W)

■ Feedback Potentiometer: 500 Ω –10 kΩ

Span: 47.5 % min. of total resistance, 95 % max.

Excitation: Approx. 4 V DC

OUTPUT SPECIFICATIONS

•Re-transmitted Output: 4 – 20 mA DC

Load resistance: 300 Ω max.

■ Control Output: SSR; 85 – 132 V AC; @ 0.03 – 1 A

continuous, @ 4 A for 1 minute

Leakage current at OFF: ≤ 10 mA