DS DS/EN 50227
DS DSEN 50227 1997-DEC-23 Control crcut devces and swtchng elements proxmty sensors dc nterface for proxmty sensors and swtchng amplfers NAMUR Replaced by DS DSEN 60947-5-6
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This standard applies to proximity sensors connected for operation by a two-wire connecting conductor to the control input of a switching amplifier. The switching amplifier contains a d.c. source to supply the control circuit and is controlled by the variable internal resistance of the proximity sensor.