Product Overview

Technical Instructions OpenAir Spring Return 20 ib-in, Rotary GQD Series, Electronic Damper Actuators
Document Number 155-760
June 23, 2008
Page 6 Siemens Building Technologies, Inc.
Table 2. Sizing.
Total Torque Actuator
≤20 lb-in (2Nm)
GQD
>20 lb-in ≤62 lb-in
(>2Nm ≤7 Nm)
GMA
>62 lb-in ≤142 lb-in
(7 Nm ≤ 16 Nm)
GCA
>142 lb-in ≤ 248 lb-in
(>16 Nm ≤ 28 Nm)
Tandem GCA
ASK73.2U*: Tandem mounting bracket with
any combination of GCA16x.
ASK73.1U
*: Tandem mounting bracket for all
other GCAx actuators.
*NOTE: Mechanically coupled actuators must be of the exact same type. Use the
correct mounting bracket.
Mounting and Installation
• The shaft adapter can be mounted on either side of the actuator. The actuator mounting orientation and shaft
length determine how they will be mounted on the actuator.
• The minimum damper drive shaft length is 3/4-inch (20 mm).
• See Specifications for the minimum and maximum damper shaft dimensions.
• A mounting bracket is included with the actuator.
• See the detailed installation instructions included with each actuator.
DIP Switch
Functionality
GQD151
Description Label Description Function
Inverse Acting Direct-Acting Input Signal Inversion
Figure 5. DIP Switch.
Input Signal Inversion
Figure 6.
Allows inverting the control input signal
The arrow direction indicates opening or closing (closing or
opening) when operating an actuator with a given control signal.
See Error! Reference source not found..
= Direct acting (Factory setting)
Input signal 2 Vdc ► fail-safe position
= Inverse acting
Input signal 10 Vdc ► fail-safe position