Field Devices Europe
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MC52A
FUNCTION
MC52A actuator is electric modulating. The valve
stem movement is produced by rotation of a
screw spindle connected, through a gear train, to
a synchronous bidirectional motor.
An internal magnetic hysteresis coupling limits
the torque on the valve stem, avoiding the usage
of microswitches and protecting the actuator
from overload.
The actuator consists of a base and a housing
made of syntetic materials which contain motor,
gear box, magnetic coupling, valve driving screw
spindle.
The actuator-valve assembly is easily made
thanks to its threaded ring nut, (which allows a
comfortable cable positioning) and an adapter to
be screwed on to the valve.
The actuator is equipped with a cable for 3-wire
electrical connection. It requires no maintenance
All models are provided with a stroke indicator.
02
MOUNTING
A microprocessor-based high performance positioner guarantees accurate control. The close-off
position is self adjusting by means of an automatic synchro nization function.
Synchronization is carried out when power is
switched on and each time the stem reaches 0%
or 100% of its travel.
Manual override is allowed by means of a socket
head key (3 mm). It is necessary to power off the
actuator before starting the manual control.
It is necessary to power off the actuator before starting the manual control.
MOUNTING
Before mounting the valve, screw the adapter
onto the valve M28x1,5 thread, then screw the
actuator onto the valve.
A ring nut M30x1.5 is placed on the lower part;
it allows an easy coupling to the valve without
special tools.
The protection degree declared (IP43) is granted
if the valve is mounted with the actuator upwards.
CONNECTIONS
B = Brown
G = Green
W = White
The actuator is able to operate in any mounting position, but it is advisable not to install it
downwards.
Schneider Electric
003 -3374-1 December 2007 mf
© 2009 Schneider Electric. All rights reserved.
Field Devices Europe
MC52A
RANGE AND SELECTION
MC52A has 7 different command field to be
selected with embedded dip-switches and
direct/reverse action, as below.
To access the dip-switches, remove the rubber
plug as shown in the picture below.
COMMAND FIELDS
03
SUITABLE VALVES
V354 - part number 731-5425-000
Rubber plug
On October 1st, 2009, TAC became the Buildings Business of its parent company Schneider Electric. This document reflects the visual identity of Schneider Electric,
however there remains references to TAC as a corporate brand in the body copy. As each document is updated, the body copy will be changed to reflect appropriate
corporate brand changes.
Schneider Electric
0 03 -33 74-1 December 20 07 mf
© 2009 Schneider Electric. All rights reserved.
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