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Compact Siemens GQD121.1P damper actuator, grey enclosure, set-screw shaft coupling, hardwired terminals

SIEMENS

SIEMENS GQD121.1P electric actuator 20 in-lb 24V AC/DC thermostat

SKU CH-61S2-EBSP0

Electric actuator delivers 20 in-lb torque with 24 V AC/DC supply for damper control

  • Product typeLearning Thermostats
  • 20 in-lb torque drives dampers reliably
  • 24 V AC/DC input fits common building systems
  • 15 second closing speed protects equipment
  • 90 degree rotation covers full damper travel
  • IP40 rating resists dust in mechanical rooms

Electric actuator for building automation

The SIEMENS GQD121.1P is a spring-return electric actuator rated at 20 in-lb of torque. It operates on 24V AC/DC power and accepts on/off control signals. The unit is designed for direct mounting on dampers or valves in building automation systems.

NEMA 1 enclosure with hardwired connections

A NEMA 1 and IP40 rating protects the mechanism in indoor environments. Hardwired electrical connections provide a permanent installation suited to fixed HVAC infrastructure. The set-screw shaft coupling fits standard damper shafts and allows clockwise or counter-clockwise rotation.

15-second spring return and 2–10V DC feedback

Spring return drives the actuator to its fail-safe position in 15 seconds when power is lost. A 2 to 10V DC output signal reports position to the building automation system for monitoring and sequencing. No separate programming tools or software bundles are included with the actuator.

How it compares

Measured against everything we stock in Thermostats & Thermostat Accessories, at today’s prices. Recalculated every night.

Price $120.99
Pricier than about 70% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameSIEMENS
Product typeLearning Thermostats

Questions about this item

What signal type does the GQD121.1P actuator use for control?

It operates with an On/Off signal and provides a 2 to 10V DC output signal for building automation integration.

What shaft coupling and rotation does this actuator require for mounting?

It uses a set screw shaft coupling and supports both clockwise and counter-clockwise 90 degree rotation.

How is the actuator wired and what common mistake occurs during installation?

It requires a hardwired electrical connection to a 24V AC/DC supply; the step often missed is confirming the spring return direction matches the damper fail-safe position.

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