Festo VTSA-44-MP Series Manual page 28

1. Summary of components
Ident. Valves
code
SA 5/3-way valve, normally exhausted, switching position 14 latching
5/3-way valve, normally open from 1 > 2, switching position 14 latching
SB
Tab. 1/5: Identification of the valve function in the type code
1-12
5/2-way valves with piston position sensing
The monostable 5/2-way valves with ID code SO or SQ (width
26 mm) have a piston position sensing. An inductive sensor
(N/C contact) monitors the neutral position of the piston
spool. The sensor has a PNP or an NPN output. The valve is
actuated via a multi-pin or fieldbus connection.
5/3-way valve with extended function
The 5/3-way valves with ident.code SA or SB have a signal-
storing function in switching position 14. If there is no longer
a signal on coil 14, the switching position 14 remains as is,
since there is no spring return on control side 12. Switching
position 12 is non-latching due to the mechanical spring
force.
Further information on the valves can be found in Appendix B.
Festo P.BE-VTSA-44-EN en 1101f