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Siemens
GMA..1 actuators with spring return
CM2Z4614en
Building Technologies
2018-01-11
2 Spring-return
actuators
This chapter provides information on application, functions, and device combinations.
Furthermore, it contains a type overview and explains the actuator design including
setting and operator elements for this family of actuators.
2.1 Application
Spring-return actuators are used in ventilating and air conditioning plants to operate air
dampers and air throttles:
∂
For damper areas up to 1.5 m
2
, friction-dependent.
∂
In ventilation sections where the actuator must move to the zero position (emergency
position) during power failure.
∂
For connection to two-position, three-position, or modulating controllers.
∂
For dampers having two actuators on the same damper shaft (tandem-mounted
actuators or Powerpack).
2.2 Type
summary
The following table shows the options for the actuator types.
GMA...
121.1E 126.1E 321.1E 326.1E 131.1E 132.1E 136.1E 161.1E 163.1E 164.1E 166.1E
161.1E/MO
Control type
Two-position control
Three-position control
Modulating control
Modbus RTU
Standard version
Operating voltage
AC 24 V
DC 24…48 V
X
X
X
X
X
X
X
X
X
AC 24 V
DC 24 V
X
Operating voltage
AC 230 V
X
X
Positioning signal Y
X
X
DC 0...10 V
DC 0...35 V with characteristic
function Uo,
Χ
U
X
X
Modbus RTU
X
Position feedback
U = DC 0...10 V
X
X
X
X
Modbus RTU
X
Feedback potentiometer 1k
ς
X
Self-adaptation of
rotary angle range
X
Auxiliary switches (two)
X
X
X
X
X
Powerpack (two actuators,
tandem-mounted)
X
X
X
X
X
X
X
For functional extensions of the actuators, the following accessories are available:
Universal lever
ASK71.9
Rotary/linear set for duct and wall mounting
ASK71.11
Rotary/linear set with lever
ASK71.13
Rotary/linear set with lever and mounting plate
ASK71.14
Weather protection cover
ASK75.3
Mounting bracket for tandem-mounted actuators or Powerpack
ASK73.3
External auxiliary switches
ASC77..E
Data sheet for accessories and spare parts
N4697
Introduction
Accessories, spare parts
