MODEL: MRP4

MRP4 SPECIFICATIONS

ES-4824 Rev.13 Page 3/6

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

TERMINOLOGY

• Overload (Lock) Protection

The Mini-Top Series is equipped with a protection circuit

against overload caused by for example the valve catching

an alien substance.

When an overload is detected, the Mini-Top stops supplying

power to the motor and the status LED blinks in 0.5 sec.

intervals.

The protection is reset automatically with applying opposite-

direction input signal or turning the power off and

restarting.

• Restarting Timer

The Mini-Top Series is equipped with a timer circuit which

gives an interval period (0 – 10 seconds) between stop-

restart actions to prevent the motor and other internal

components from overheating.

It is recommended to set a long restarting time when the

ambient temperature and/or the temperature of flow

material is high.

• Electronic Limiter

This model is equipped with electronic limiters in order to

prevent mechanical locks when the input goes below 0 % or

above 100 %.

Limiters are set at approx. -0.5 % for the full-closed side,

approx. 100.5 % for the full-open side.

• Full-open/-closed signal (limit switch contact)

The Mini-Top series is optionally equiped with

full-open/-closed signal that makes at full-open or -closed

position. These positions are NOT proportional to the span

and/or zero adjustments.

• Full-closed/overload signal (relay contact)

The Mini-Top series is optionally equiped with full-

closed/overload signal that makes at full-closed position

and/or detecting overload (see “Overload Protection”). This

full-closed position is proportional to the span and/or zero

adjustments.