The D4GS-N1T-5 is a slim-profile safety door switch from Omron, built with one NC and one NO slow-action contact pair. That 1NC/1NO arrangement is standard for safety guard monitoring — the NC channel feeds the safety relay or controller, the NO channel signals the guard position to the PLC. The 5 m pre-wired cable means it reaches from the guard edge to a typical junction box without a splice, saving a termination point in the panel. The conventional free-air thermal current Ith is 2.5 A per EN 60947-5-1, which sets the continuous current-carrying capacity through the contacts in a non-motor load circuit. Operating speed is specified at 0.1 to 0.5 m/s, meaning the actuator must move through the switch at that speed range for reliable contact transfer; too slow and the contacts may tease, too fast and mechanical bounce could cause a false pulse. Rated for 30 operations per minute maximum, so it is not intended for high-cycle counting applications — think guard door monitoring on a machine cell that opens a few times per shift, not a pick-and-place guard that cycles every few seconds.
This class of slim safety door switch is deployed on hinged or sliding machine guards where panel space is tight — the slim body fits into extruded aluminum framing or shallow door profiles where a standard 30 mm switch would protrude. The vertical key insertion (T designation) means the actuator enters from above, common on side-hinged doors where the switch mounts on the fixed frame and the actuator on the door edge.