User Guide

OpenAir™ Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
24 Vac – Modulating Control Document Number 155-187P25
May 19, 2014
Siemens Industry, Inc. Page 17
4. Connect wires S1 and S2 to the DMM. The DMM should indicate open circuit or no
resistance.
5. Stop the signal to wire 8 (gray). The DMM should indicate contact closure as the
actuator shaft coupling reaches the setting of switch A.
Check the Auxiliary Switch B:
1. Set the DMM dial to ohms (resistance) or continuity check.
2. Connect wires S4 and S6 to the DMM. The DMM should indicate open circuit or no
resistance.
3. Apply a full-scale input signal to wire 8 (gray). The DMM should indicate contact closure
as the actuator shaft coupling reaches the setting of switch B.
4. Connect wires S4 and S5 to the DMM. The DMM should indicate open circuit or no
resistance.
5. Stop the signal to wire 8 (gray). The DMM should indicate contact closure as the
actuator shaft coupling reaches the setting of switch B.
Dimensions
Figure 32. Dimensions of the ASK75.7U Weather Shield in Inches (Millimeters).