MEX-C VALVE POSITIONER

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MEX-C

Final Control Elements

VALVE POSITIONER

(potentiometer feedback; external SSR drive)
Functions & Features
• Controlling an electric actuator powered with 100/ 200 V AC
• Feedback potentiometer 100 Ω – 10 kΩ
• Constant current output for driving external SSRs
• Timer for motor's overheat protection
• Re-transmitted output
Typical Applications
• Three phase AC motor
• Loop powered isolator can be used for isolating between setpoint input signal and transmitter output signal

MODEL: MEX–C–[1][2]

ORDERING INFORMATION

• Code number: MEX-C-[1][2]
Specify a code from below for each of [1] and [2].
(e.g. MEX-C-B/Q)
• Specify the specification for option code /Q
(e.g. /C01/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 our web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating
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 or 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: 0.4 V DC

OUTPUT SPECIFICATIONS

■ Re-Transmitted Output: 4 – 20 mA DC
Load resistance: 750 Ω max.
■ Control Output: 10 V DC @ 10 mA for ON;
0 mA for OFF

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 or output to power)
2000 V AC @ 1 minute (input or xmtr output or output or power to ground)