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EUCHNER · original
The EUCHNER SN02D12-502-MC1688 position safety switch is an electromechanical switch intended for monitoring the position of protective doors, guards and safety railings on CNC machine tools. Opening the guard mechanically opens the NC contacts and closes the NO contacts, signalling the machine's control system that the "door is open" — the control then safely stops axis motion, switches off the spindle or puts the machine into service mode according to the safety logic.
The designation SN02D12-502 is a standard EUCHNER catalogue number — SN denotes the series, 02D12 the specific mechanism and contact configuration (2 NO + 2 NC, spring actuation, metal head), 502 indicates the specific type of actuating element. The MC1688 suffix is an internal customer code that identifies the specific configuration for a given machine manufacturer.
EUCHNER switches have a long service life (on the order of millions of cycles) and comply with the safety standards EN ISO 13849 and EN 60947. In European engineering they are the de facto standard for safety applications — a 1:1 replacement is usually trouble-free, provided you keep the same type designation.
The SN02D12-502-MC1688 switch is used in the safety circuits of CNC milling centres, lathes and machining centres for monitoring the position of safety guards and service doors. EUCHNER switches are the de facto standard for safety applications in European engineering — a 1:1 replacement is usually trouble-free, provided you keep the same type designation.
The MC… suffix identifies a specific customer configuration. Before ordering we verify the machine, the year of manufacture and a photo of the existing switch's nameplate. What we'll need from you →
Send the machine type, year of manufacture and a photo of the existing switch's nameplate — we'll verify the MC… variant and usually send a quote within 24 hours.
