Technical Instructions  OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator 
Document No. 155-173P25   
May 19, 2014 
Page 2  Siemens Industry, Inc. 
 
 
Product Numbers 
Table 1. 
Control  Cables 
Product 
Number 
24 Vac ± 20% 
24 Vdc ±10% 
120 Vac ± 10% 
0 to 10 Vdc 
2 to 10 Vdc or 
Floating  
Standard 
Plenum 
Switches 
Signal Inversion 
Offset 0 to 5 Vdc 
Span 2 to 30 Vdc 
GCA126.1U  ● 
        ●  ●      ●     
GCA132.1U  ●  ●        ●    ●    ●       
GCA151.1P  ●  ●      ●        ● 
  ●   
GCA161.1U  ● 
  ●        ●   
     
GCA161.1P  ● 
  ●          ● 
     
GCA164.1U  ● 
 
      ●   
●    ● 
GCA166.1P  ● 
  ●          ● 
●     
 
 
Warning/Caution Notations 
 
WARNING: 
Personal injury/loss of life may occur if you do not 
perform a procedure as specified. 
 
CAUTION: 
Equipment damage may occur if you do not 
perform a procedure as specified.