Technical Instructions
SQM5… Reversing Actuators
Document No. 155-517P25
July 9, 2007
Page 18
Siemens Building Technologies, Inc.
Features of
SQM5x.xxxxxGx,
SQM5x.xxxxxHx,
SQM5x.xxxxxKx
Actuators
SQM5x.xxxxx
G
x actuators contain the AGA56.41A… circuit board with terminals Y- and
Y+ for 4 to 20 mA modulating input.
SQM5x.xxxxx
H
x actuators contain the AGA56.42A… circuit board with terminals Y, M
and U for 0 to 135
Ω
modulating input.
SQM5x.xxxxx
K
x actuators contain the AGA56.43A… circuit board with terminals Y and M
for 0 to 10 Vdc modulating input.
Input Signals
The AGA56.4xA… circuit boards accept the following additional input signal:
Line voltage
•
Power to A drives the actuator open to the setting of switch cam I (Maximum).
•
Power to Z drives the actuator closed to the setting of switch cam II (Economy).
•
Power to ZL drives the actuator closed to the setting of switch cam III (Minimum).
Output Signals
The AGA56.4xA… circuit boards do not provide output signals. Install a double
potentiometer ASZ22…to obtain a 0 to 1000
Ω
actuator position output signal.
Features of
SQM5x.xxxxxAx
Actuators
Input Signals
The AGA56.1A97… circuit boards accept the following additional input signal:
Line voltage
•
Power to A drives the actuator open to the setting of switch cam I (Maximum).
•
Power to Z drives the actuator closed to the setting of switch cam II (Economy).
•
Power to switch III, terminal 3 drives the actuator to the setting of switch cam III
(Minimum).
Output Signals
The AGA56.1A97 circuit board provides no output signals. Install an ASZ… potentiometer
to obtain an actuator position output signal.
Service Guide
WARNING:
Disconnect the power supply to the actuator before performing any service
functions.
Reversing Rotational
Direction
1. Disconnect the wires marked 21 and 12, and reverse.
2. Adjust all switch cams to the desired settings (see Figure 6):
•
For CCW rotation use the black cam drum scales and the single switch cam
pointers.
•
For CW rotation, use the red cam drum scales and the double switch cam pointers.
NOTE:
Press and hold the black cam drum release button to rotate the cam drum.
This will give easy access to the switch cams and a better view of the cam
drum scales.
If no potentiometer ASZ… is installed, the reversing procedure is complete. If a
potentiometer ASZ… is installed, complete Steps 3 through 9.
