Installation Instructions

Document No. 129-217
Installation Instructions
September 24, 2018
Page 4 of 6 Siemens Industry, Inc.
Wiring for SKD82…U, Continued
Figure 12. Non-Spring Return SKD82.50U.
Connecting Terminals
G
System Potential 24 Vac (+)
Y1
Outward movement of coupling piece (0 to 1)
Y2
Inward movement of coupling piece (1 to 0)
Cm1
Limit switch for 100% stroke
c1
ASC9.3DU double auxiliary switch
c2
ASC9.3DU double auxiliary switch
1000 
ASZ7.3 potentiometer
The diagram shows all possible connections. How
many and which are used depend on the application.
Figure 13. Spring Return SKD82.51U.
Connecting Terminals
G
System Potential 24 Vac (+)
21
System Neutral (SN)
Y1
Outward movement of coupling piece (0 to 1)
Y2
Inward movement of coupling piece (1 to 0)
Cm1
Limit switch for 100% stroke
c1
ASC9.3DU double auxiliary switch
c2
ASC9.3DU double auxiliary switch
1000 
ASZ7.3 potentiometer
The diagram shows all possible connections. How
many and which are used depend on the application.
Start-Up
Check the wiring for proper connections.
Consult Flowrite 599 Series SKD6xU Electronic Valve
Actuators 24 Vac Proportional Technical Instructions
155-180P25 for detailed commissioning information.
Normally Closed Valve
Actuator pressure cylinder moves:
• Outward (0 to 1): Valve opens.
• Inward (1 to 0): Valve closes.
Normally Open Valve
Actuator pressure cylinder moves:
• Outward (0 to 1): Valve closes.
• Inward (1 to 0): Valve opens.