The Panasonic EE-SPZ401-A is a retroreflective optical sensor with a 200 mm sensing distance, NPN open-collector Light-ON output, and a 5 V supply. It uses an infrared LED and requires a mirror as the sensing object. The through-hole PCB mount and bulk packaging suit panel builds where the sensor board is fixed in place and wired to a PLC input card.
The 200 mm sensing distance covers typical retroreflective applications like part-present detection on a conveyor or level sensing through a window. The NPN Light-ON output pulls low when the beam is made — standard for sinking PLC inputs. The 5 V supply rail is common on control boards; the 0.015 A switching current handles the PLC input load without an external buffer.