Mode of operation
A carrier plate uses adaption to make a positive fit on the spring-return actuator and
transfers the rotary movement directly to the feedback potentiometer.
Switching points can be freely selected with an adjustment dial. The current switch
position can be read off at any time.
Application
The auxiliary switch unit is used for signaling the position or for exercising switching
functions in any given angle setting.
Simple direct mounting
The auxiliary switch unit is connected directly by means of adaption with the hollow
shaft (LF.., NF..A.., SF..A..) of the actuator. Once it is mounted, the unit is screwed to
the actuator.
The spindle clamp is mounted on the bottom side.
Electrical installation
Wiring diagrams
S1 S2
S3
S4 S5
S6
S1
S2
S3
S4
S5
S6
S2A
S1 S2 S3 S4 S5 S6
0...100%
Cable colours:
S1 = violet
S2 = red
S3 = white
S4 = orange
S5 = pink
S6 = grey
S2A-F
Auxiliary switch unit, suitable for the spring return
actuators NF..A.., SF..A.., LF..
Product features
www.belimo.com
S2A-F • en-gb • 2019-04-12 • subject to changes
2
