ES-4622 Rev.7
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