Historical
NFPA/T3.5.29 R1-2007 Second edition
Fluid power systems and components - Electrically-controlled industrial valves - Interface dimensions for electrical connectors (Revision and redesignation of ANSI/B93.55M-1981)
Includes interface dimensions and configurations for electrical plug-type connectors (not intended for current interruption) used with a single or double electrically-controlled fluid power control valve used in industrial (in-plant) applications.
National Fluid Power Association [nfpa-fluid]