ES-4615 Rev.10
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
: 0.5 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)
EXTERNAL VIEW
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM