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Guardmaster safety relay
Found 1 free book(s)Guardmaster EtherNet/IP Network Interface User Manual
literature.rockwellautomation.comENETR The Guardmaster EtherNet/IP network interface (catalog number 440R-ENETR). GSR A Guardmaster safety relay. N.C. (Normally Closed) An electrical contact whose normal state (that is, no pressure or electrical potential applied) is in the closed position.