D4SL-N Solenoid Interlock Switch Power to Unlock 24 V dc. Actuator Type: Various Options. Conduit Entry: M20. Length: 39mm. Width: 39mm. Depth: 179.9mm. Auxiliary Contacts: 3NC. Dimensions: 39 x 39 x 179.9 mm. IP Rating: IP67. Housing Material: Metal. Safety Contacts: 3NC. MPN: D4SLN4RDAD, Omron