Product Overview

Technical Instructions ng Return, 62 lb-in Rotary, Electronic Damper Actuators
Document Number 155-315P25
January 26, 2011
Page 12 Siemens Industry, Inc.
OpenAir GMA Series, Spri
Dual Auxiliary
Switch
GMA126
GMA226
GMA136
GMA156
GMA164
GMA166
Actuator rotary range with the shaft
adapter mounted at position "0".
Setting range for switches A and B
Setting interval: 5°
Switching hysteresis: 2°
To change the settings of A and B:
Make sure the actuator is in the "0", fail-safe
position. The scale is valid only in the "0"
position.
Use the adjustment tool provided with the
actuator to turn the switch adjustment
dials to the desired setting at which a
signal is to be given.
Factory setting:
Switch A = 5°
Switch B = 85°
50
40
30
20
10
50
60
70
80
90
A
B
Aux Switch
Adjustment
EA0875R1
Figure 13. Adjustable Switching
Values for the Dual Auxiliary Switches.
NOTE: Use the long arm of the "†" to point to the position of switch A. Use the
narrower tab on the red ring to point to the position of switch B.
DIP Switch
Functionality
GMA 151
GMA 156
Description Label Description Function
Inverse Acting
Direct-Acting Input Signal Inversion
Inverse-Acting Feedback Direct-Acting feedback Feedback Signal inversion
Not In Use
Figure 14. DIP Switches.
Input Signal Inversion
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.
= Direct acting (Factory setting)
Input signal 2 Vdc ► fail-safe position
= Inverse acting
Input signal 10 Vdc ► fail-safe position
Feedback Signal Inversion
Allows inverting the position feedback output signal
= Direct acting feedback (Factory setting)
Fail-safe position ► Output signal 2 Vdc
= Inverse acting feedback,
Fail-safe position ► Output signal 10 Vdc