OMRON
Waterproof Terminals
SRT2-ID04CL

Input/Output: Inputs. Internal I/O circuit common: NPN (+ common). I/O points: 4 points.

OMRON
Waterproof Terminals
SRT2-ID04CL-1

Input/Output: Inputs. Internal I/O circuit common: PNP (– common). I/O points: 4 points.