The RT-P3231 is a photoelectric proximity sensor with background suppression from the Zone Control series, using an infrared LED emitter. Its 900 mm maximum sensing distance (60 mm minimum) means it reliably detects objects up to that range while ignoring background surfaces beyond the set point — critical for conveyor or pallet-positioning applications where false triggers from a back wall or floor would cause nuisance stops. The 2 ms response time keeps up with fast-moving targets on a packaging line; at typical belt speeds of 1 m/s, that translates to about 2 mm of target movement during the sensing window, so small parts won't be missed. The PNP output (100 mA load current) sinks into a standard PLC input module — verify your controller's input type before wiring, since NPN-only cards would need a pull-up resistor or a converter.
Deployment context
The M12 4-pin connector (standard for industrial sensors) mates directly to a pre-wired pigtail or field-attachable connector; no cable gland or terminal strip needed at the sensor end, which speeds replacement during a line-down event. The 20.6 mm width and 99.2 mm height fit into the common 20 mm slot of a standard sensor mounting bracket — no adapter plate required for most DIN-rail or machine-frame mounts.