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MRP4 / MRP5 / MRP6

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EM-4824 Rev.7

MINI-TOP ELECTRONIC ACTUATOR

(rotary type)

MODEL

MRP4/MRP5

/MRP6

INSTRUCTION MANUAL

BEFORE USE ....

Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.

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PACKAGE INCLUDES:

Mini-Top ........................................................................ (1)

The Mini-Top is not provided with a yoke or other compo-
nents required for mounting it to a valve. They are to be
provided by the user.

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MODEL NO.

Confirm that the model number described on the product is
exactly what you ordered.

POINTS OF CAUTION

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CONFORMITY WITH EC DIRECTIVES

• This equipment is suitable for use in a Pollution Degree

2 environment and in Measurement Category II, with the
maximum switching voltage of 125V. (Applicable to the
full-open/-closed signal only)

Prior to installation, check that the insulation class of this

unit satisfies the system requirements.

• Altitude up to 2000 meters
• The equipment must be installed such that appropriate

clearance and creepage distances are maintained to con-
form to CE requirements. Failure to observe these re-
quirements may invalidate the CE conformance.

• Install lightning surge protectors for those wires con

nected to remote location. Refer to “LIGHTNING SURGE

PROTECTION” section below.

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POWER INPUT RATING & OPERATIONAL RANGE

• Locate the power input rating marked on the product and

confirm its operational range as indicated below:

Rating 100 – 120V AC: 90 – 132V, 47 – 66 Hz, approx. 25VA

Rating 200 – 240V AC: 180 – 264V, 47 – 66 Hz, approx. 25VA

Rating 24V DC: 24V ±10%, approx. 0.6A

• A fuse of the following rating is incorporated: 250V/1A

time delay.

• A rush current 1.5 times as high as the above ratings can

flow at the startup.

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GENERAL PRECAUTIONS

• Remove the power supply to the actuator before wiring to it.

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INSTALLATION

• Indoor, or outdoor where the MRP is NOT exposed to di

rect sunlight.

• Ambient temperature: -5 to +55°C (23 to 131°F)
• Vibration: 0.5 G max.
• Install the MRP where you can reach for maintenance.

Observe at the minimum of 15 centimeters (6 inches)

above the cover.

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OUTDOOR USE

• When installing the MRP outdoor or where it is exposed to

rain or water drops, be sure to fasten the cable connector
tightly and leave a slack of the cable.

• Do not mount the MRP in such direction that the output

stem or cable connector is at the top of the MRP unit.

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ELECTRICAL CONNECTION

• With DC power type unit, power supply and signal lines

are not isolated. Use an isolator if needed.

• When you use a cable other than the standard 1-meter

cable equipped with non-terminal box type unit and its
extension distance is longer than that, use shielded cables
for signal line, or install signal cables in a separate piping
from power supply cables.

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LIGHTNING SURGE PROTECTION

• In order to protect the unit from lightning surges entering

through cables, use of appropriate lightning surge protec-

tors are recommended. For 24V DC power supply line,

choose a surge protector with its maximum surge voltage

40V or less between lines. Recommended M-System mod

el: MDP-D24.

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PID CONTROLLER

• Choose PID parameters carefully so that the MV remains

as stable as possible. Unstable operations shorten the life
of actuator and valve.