MODEL: MEX-F

MEX-F SPECIFICATIONS

ES-4623 Rev.7 Page 2/5

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

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); 5 sec. minimum with

breaking function

Isolation: Setpoint input or xmtr output or feedback input to

control output to power (For external SSRs control output,

non-isolated between control output and setpoint input etc.)

Zero adjustment (front)

Potentiometer feedback: 0 – 25 %

Current feedback: -10 – +10 %

Span adjustment (front)

Potentiometer feedback: 75 – 100 %

Current feedback: 90 – 110 %

Operation mode: Front-accessed DIP switches; failsafe

operation (full-open, full-closed or stop) when there is no

position input signal (approx. -12.5 %); direct/reverse re-

transmitted output; direct/reverse control action

Electronic limit: Front-accessed potentiometers provided for

Operation Mode Selector type

• Zero limit: Approx. -10 – +5 %

• Span limit: Approx. 95 – 110 %

Breaking function: Dynamic brake (applicable with 100 to

120 V AC motor only)

LCD meter: Indicating re-transmitted output signal; 0.1 %

increments

INPUT SPECIFICATIONS

■ Setpoint Input

Input resistor: Attached to input terminals (0.5 W)

■ POSITION FEEDBACK INPUT

• Current: 4 – 20 mA DC

Input resistance: 20 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

• SSR: Zero-cross fucntion; 80 – 264 V AC @ 0.1 – 1 A

The built-in SSR cannot drive 200 V AC motor

(direct/reverse).

Leakage current at OFF: Approx. 10 mA @ 240 V

Remark: When driving relays with this control output, relays

may operate erratically due to the leakage current at OFF of

SSR. To avoid the problem, install a resistor (R) in parallel

with the relay coil.

R < [Release Voltage] / ([Leakage Current at OFF] –

[Release Current])

Output Operation: Refer to the figure at the end of this

section.

■ Constant Current

Rating: 10 V DC, 10 mA ±10 % at ON;

0 mA at OFF

Output Operation: Refer to the figure at the end of this

section.

• 24 V AC Dry Contact

Drive: Photo MOSFET relay

Rating: 27 V AC/DC @ 1 A

Leakage current at OFF: 1 mA @ 30 V AC

Output Operation: Refer to the figure at the end of this

section

(2-3)ON to min.

(1-3)ON to max.

Deviation

(Setpoint) – (Feedback)

+

–

0

Deadband

• Output Operation (terminal No. in parentheses)

INSTALLATION

Power input

•AC: Operational voltage range: rating ±10 %,

50/60 ±2 Hz, approx. 3 VA

•DC: Operational voltage range: 24 V ±10 %, approx. 120

mA (ripple 10 %p-p max.)

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 %

Re-transmitted output accuracy: ≤ 3 % excluding offset and

deadband

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength: 2000 V AC @ 1 minute (setpoint input or

xmtr output or feedback input to control output to power to

ground)

(For external SSRs control output, non-isolated between

control output and setpoint input etc.)