8.
Signals
8.1
Feedback signals from actuator
Information
The switches can be provided as single switches (1NC and 1 NO), as tandem swit-
ches (2 NC and 2 NO) or as triple switches (3 NC and 3 NO). The precise version
is indicated in the terminal plan or on the order-related technical data sheet.
Type and designation in terminal plan
Feedback signal
Setting via limit switching
Switches: 1 NC and 1 NO (standard)
End position OPEN/CLOSED
reached
Limit switch, closing, clockwise rotation
LSC
Limit switch, opening, counterclockwise rotation
LSO
Setting via DUO limit switching
Switches: 1 NC and 1 NO (standard)
Intermediate position reached
Limit switch, DUO, clockwise rotation
LSA
Limit switch, DUO, counterclockwise rotation
LSB
Setting via torque switching
Switches: 1 NC and 1 NO (standard)
Torque OPEN/CLOSED rea-
ched
Torque switch, closing, clockwise rotation
TSC
Torque switch, opening, counterclockwise rotation
TSO
Thermoswitches or PTC thermistors, depending on version
Motor protection tripped
Thermoswitches
F1, Th
PTC thermistors
R3
Switches: 1 NC (standard)
Running indication
Blinker transmitter
S5, BL
Via potentiometer or electronic position transmitter RWG, depending on version
Valve position
Potentiometer
R2
Potentiometer in tandem arrangement (option)
R2/2
3- or 4-wire system (0/4 – 20 mA)
B1/B2, RWG
2-wire system (4 – 20 mA)
B3/B4, RWG
24
SA 25.1 – SA 48.1/SAR 25.1 – SAR 30.1
Signals