Schneider Electric MC52A Catalog Page
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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.
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