The Siemens 3RG7210-6EK00 is a SIMATIC PXO610 K80 diffuse sensor — an energetic photoelectric unit with surplus light detection, built for presence sensing in industrial environments. It operates on a universal voltage supply of UC 20-320V, outputs a 2-meter NPN antivalent signal rated at 200mA, and includes an adjustable timer from 0.1 to 10 seconds. The housing measures 83x61x25 mm, terminates via a PG11 cable gland into a 5-pole connection, and carries an IP67 rating for washdown or dusty areas.
The UC 20-320V supply covers both AC and DC control voltages across a wide range — 24 VDC panels, 120 VAC, and 230 VAC all work without a separate power supply module. The NPN antivalent output gives you both normally-open and normally-closed signals on separate wires, which simplifies wiring to a PLC input card that expects a sinking signal. The 200 mA rating is the maximum load per output; if you are driving a contactor coil or indicator lamp directly, verify the inrush stays under that limit. The timer (0.1–10 s) is a one-shot or off-delay built into the sensor, useful for ignoring short interruptions or extending a detection pulse for a slow controller scan.