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.
■
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.
■
MODEL NO.
Confirm that the model number described on the product is
exactly what you ordered.
POINTS OF CAUTION
■
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.
■
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.
■
GENERAL PRECAUTIONS
• Remove the power supply to the actuator before wiring to it.
■
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.
■
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.
■
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.
■
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.
■
PID CONTROLLER
• Choose PID parameters carefully so that the MV remains
as stable as possible. Unstable operations shorten the life
of actuator and valve.
■
O-RING, GASKET
• When replacing the actuator cover after adjustments,
check that the O-ring is securely placed in the groove.
• When replacing the terminal box cover, check that the
gasket is in place.
■
YOKE DESIGN
• When a foreign object is caught in the valve, a torque 2
times greater than the maximum rating could be gener-
ated. Leave enough strength for mechanical components
such like the yoke and stem.
• If the MRP is used on a steam line in temperature con
-
trol, it is possible that the MRP’s temperature rises higher
than the ambient temperature due to transmission or ra-
diation via the steam piping, even when the ambient tem-
perature is within allowable range.
Use a longer yoke to increase heat dissipation and apply
insulating material.
■
AND ....
• DO NOT loosen the screw fixing the potentiometer stem.
Loosening it could cause a malfunction.
• DO NOT step onto the actuator. DO NOT rest a heavy
object on or against it.
Cable Connector
DO NOT Pull Tightly
Rugghölzli 2
CH - 5453 Busslingen
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
www.sentronic.com
Produkte, Support und Service
SENTRONIC
AG
