The Siemens 3RG7406-7CH61 is a SIMATIC PXO310 L20 laser diffuse sensor with background suppression. It operates on DC 10-30V, has a sensing range of 30-110mm, a PNP output configurable for light-on or dark-on, and a maximum load current of 100mA. The housing measures 31x20x12mm and terminates in an M8 4-pole connector, rated IP67.
The 30-110mm sensing range with background suppression means the sensor reliably detects objects within that window while ignoring reflective backgrounds beyond it — critical for conveyor or pick-and-place applications where belt or backplate reflections would false-trigger a standard diffuse sensor. The PNP output, selectable light-on or dark-on, gives flexibility for both sinking PLC inputs and safety circuit logic. The 100mA output current handles direct relay or small valve loads without an interposing module. The IP67 rating allows washdown exposure in food or automotive environments.