D4SL-N4RDG-D4 Omron ⍾ 377989 ⍾ D4SLN4RDGD4 ⍾ D4SL2383F

Door locking switch, M20, 2NC/1NO + 1NC/1NO, head: metal, 24VDC solenoid lock/mechanical release, LED indicator, special release key

Guard lock safety-door switch, D4SL-N, M20, 1NC/1NO + 1NC/1NO, head: resin, 24VDC solenoid release/mechanical lock

Door locking switch, M20, 2NC/1NO + 1NC/1NO, head: metal, Mechanical lock/24VDC solenoid release, LED indicator