What This Sensor Is and What It Does
The Siemens 3RG7400-0HH00 is a SIMATIC PXO310 K20 diffuse-mode photoelectric sensor in a compact 31x20x12 mm housing. It operates on DC 10-30V and provides an NPN output rated at 100 mA, with a sensing range of 50 cm. The output is programmable for light-on or dark-on operation, and the connection is via a 2-meter PUR cable with 4x0.14 mm² conductors. The IP67 rating makes it suitable for washdown or dusty environments.