What this sensor does in the line
The E2A-M30KN20-WP-B1 2M: The Omron E2A-M30KN20-WP- 2M is an M30 inductive proximity sensor from the E2A series, described as a Standard Double Distance Sensing unit. It detects ferrous metal targets at up to 20 mm — double the range of a standard M30 shielded sensor.
Output type and wiring
This variant uses a DC 3-wire NPN normally-open output — the in the part number codes NPN NO. That means the output switches low (sinks to ground) when a target enters the sensing field. If your PLC or controller input expects a PNP sourcing signal, this sensor will not drive it directly; you would need a PNP version (e.g., E2A-M30KN20-WP-D1 2M).