Integrator note — WLD4FP-841121A0ZZZZ2
The SICK WLD4FP-841121A0ZZZZ2 is a W4F-series retro-reflective photoelectric sensor with a 4.5 m sensing range using a PinPoint visible red LED. It switches at 500 µs with a push-pull output configurable for light or dark operation, powered from 10–30 VDC and rated to 100 mA load current. The 16 mm wide housing and M12 4-pin connector make it a direct fit for tight DIN-rail or bracket-mount panels where space is at a premium. The IP66/IP67/IP69 rating means it survives washdown at high pressure and temperature — suitable for food-and-bev lines or outdoor conveyor stations where hose-down is the cleaning standard.
The 4.5 m retro-reflective range covers most pallet and tote detection on a conveyor — you need a reflector mounted opposite. The 500 µs response handles fast-moving product at typical line speeds without missing targets. Push-pull output (PNP/NPN compatible) simplifies wiring to most PLC input cards; no pull-up resistor needed. The 10–30 VDC supply range means it works on standard 24 V control power with headroom for brownout conditions. The -40 to 60 °C operating range covers freezer-to-oven environments; no derating needed for cold storage or hot washdown zones.