NFPA (Fluid) T3.21.20-2007


Pneumatic fluid power -- Electrical connections for valve islands -- Correspondence between solenoids and electrical connector pins and sockets Edition: 1st
National Fluid Power Association / 09-Aug-2008 / 10 pages

1 Scope
1.1 This standard applies to pneumatic directional control valves mounted in a valve island, whose solenoids aredirectly energized through a single, multi-wire cable that is secured to the valve island with an electrical connector. Itdoes not apply to a fieldbus system.
1.2 This standard provides a means to identify the stations in a valve island and the solenoids located in a station, inorder that they may be identified for control purposes.
1.3 The standard also provides an association between the solenoids in their stations, and the pins/sockets in theelectric connector for the valve island.
1.4 The standard defines a code to facilitate communications of the valve island solenoid connections.

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