Installation Instructions

Document Number: 129-185
Installation Instructions
September 24, 2018
Page 6 of 9 Siemens Industry, Inc.
Spring Return SKB82.51U and SKC82.61U
Figure 26.
Figure 27. Spring Return.
Connecting Terminals
G
System Potential 24 Vac (+)
21
System Neutral (SN)
Y1
Downward movement of coupling piece
(0 to 1)
Y2
Upward movement of coupling piece
(1 to 0)
Cm1
Limit switch for 100% stroke
c1
ASC9.3BCU double auxiliary switch
c2
ASC9.3BCU double auxiliary switch
1000 
ASZ7.3 potentiometer
Start-up
Check the wiring for proper connections.
Consult Technical Instructions for detailed
commissioning instructions.
Stroke Calibration
To determine the stroke positions 0% and 100% in the
valve, calibration is required when the valve/actuator
are commissioned for the first time.
For this purpose, the actuator must be mechanically
connected to a valve and must have a supply voltage
of 24 Vac. Repeat the calibration procedure as often as
necessary. See Flowrite 599 Series SKB/C Electronic
Valve Actuator Proportional Control Technical
Instructions 155-163P25 for details.
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.
Three-Way Valve
Actuator pressure cylinder moves:
• Outward: Valve opens between port NC and C.
• Inward: Valve opens between ports NO and C.
NOTE: The valve body assembly determines the
complete assembly action.
Reference
Technical Instruction
Document Number
Flowrite EA599 Series
SKB/C Electronic Valve
Actuator Proportional Control
155-163P25
Flowrite EA599 Series
SKB/C Electronic Valve
Actuator 3-position (Floating)
Control
155-171P25