SIEMENS
SIEMENS GCA161.1P Modulating Electric Actuator 160 in-lb
Modulating electric actuator delivers 160 in-lb torque for 90-degree damper control with 24V AC supply and 0-10V DC feedback
- TypeLearning Thermostats
- Proportional control for precise damper positioning
- 160 in-lb torque handles demanding HVAC applications
- 24 V AC supply simplifies building wiring
- Spring return closes in 15 seconds for fail-safe operation
- IP54 rating protects against dust and water ingress
Modulating Electric Actuator 160 in-lb
The SIEMENS GCA161.1P is a modulating electric actuator designed for valve and damper applications in building automation systems. It delivers proportional control with a rated torque of 160 in-lb and operates on 24V AC input voltage. The unit provides a 0 to 10V DC output signal for precise position feedback. It is suited for facility engineers and HVAC technicians integrating damper control into automated building management.
Direct Mount with Spring Return
The actuator features a self-centering shaft coupling that allows direct mounting onto a 90-degree stroke shaft with clockwise or counterclockwise rotation. A spring-return mechanism drives the actuator to its fail-safe position within 15 seconds during power loss. Hardwired electrical connections suit permanent conduit installations. The NEMA 2 and IP54 ratings protect internal components from dripping water and dust ingress in mechanical rooms.
Proportional Signal Limits
Proportional 0 to 10V DC signalling requires compatible controller outputs and shielded cable runs to avoid voltage drop over distance. The 24V AC supply must be sourced from a dedicated transformer sized for the actuator's draw. Spring-return timing is fixed at 15 seconds and cannot be adjusted for slower damper closure. The device does not support digital bus protocols such as BACnet or Modbus without external gateway hardware.
Highlights
- Proportional control for precise damper positioning
- 160 in-lb torque handles demanding HVAC applications
- 24 V AC supply simplifies building wiring
- Spring return closes in 15 seconds for fail-safe operation
- IP54 rating protects against dust and water ingress
Specifications
| Brand | SIEMENS |
|---|---|
| Type | Learning Thermostats |
Questions about this item
What does the 0 to 10V DC output signal cap in practice?
The proportional output ranges from 0 to 10V DC, providing a linear control signal to the building automation system that corresponds directly to the actuator's 90-degree stroke position.
What shaft and mounting provisions does the GCA161.1P require?
It uses a self-centering shaft coupling for direct mounting on a damper shaft and operates with a 90-degree rotation in either clockwise or counter-clockwise direction.
How is the actuator wired and which step is often missed?
The unit requires a hardwired 24V AC supply; the step often missed is verifying the spring-return direction matches the damper's fail-safe requirement before applying power.
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