SNS20-28C Actuator with Internal Battery Back-up Installation, Operation & Maintenance Manual
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ACTUATOR SET-UP FOR MODULATING OPTION ACTUATOR:
After the actuator is mounted mechanically to the valve and the external electrical wiring is
complete, the actuator is ready for set up. The actuator cover will need to be removed, if not
already done.
1) The Safe & Secure board will supply power to the Modulating Controller Board. When the
incoming power to the unit fails, the battery will supply power to the Controller Board and
run the motor to the selected FAIL position.
2) Set the DIP Switch #3 to ON (right) & #4 to OFF (left) on the DMC 102 Controller Board.
This will run the actuator to the CLOSED position in the event of a
loss of input control
signal
. If it is desired to have the actuator go to the OPEN position when the input signal is
lost, then DIP Switch #3 is set to OFF (left) & #4 is set to ON (right).
**
DO NOT CHANGE THESE SWITCH SETTINGS WITH THE POWER ON!!
Green & Red
LEDs –
close
and open
indicators
Zero Pot
Span Pot
Configuration
Dip Switches
Modulating
Board, 4-20mA
Limit Switch
CAMs
Power & Signal
Connections –
AC & DC Inputs
