MEX-M1

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
 

MODEL: MEX–M1–[1]1–K[2]

ORDERING INFORMATION

• Code number: MEX-M1-[1]1-K[2]
Specify a code from below for each of [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 our 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

INSTALLATION

Power consumption
•AC: Approx. 4.5 VA excluding motor consumption
Operating temperature: -5 to +55°C (23 to 131°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

Temp. coefficient: ±0.025 %/°C (±0.014 %/°F)
Line voltage effect: ±0.25 % over voltage range
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @ 1 minute
(input or xmtr output to output or power)

EXTERNAL VIEW

EXTERNAL DIMENSIONS unit: mm [inch]

TERMINAL ASSIGNMENTS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

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