The Siemens 3RG7210-6MC88 is a special version diffuse sensor with transmitter and receiver separated — 83x61x25 mm, mounted on a bracket. It operates on universal voltage 20-320 V AC/DC, outputs via a relay C-contact (antivalent), and includes a bright LED display, a timer adjustable 0.1-10 s, and an internal heater. The PG11 cable gland and 5-pole connection make it a direct swap for existing installations where the same form factor and wiring are already in place.
What the ratings mean for fit
The universal voltage supply (UC 20-320 V) covers both AC and DC control circuits without needing a separate power supply module — useful in retrofit panels where the control voltage may vary. The relay C-contact (antivalent) gives both normally-open and normally-closed outputs from a single switching element, simplifying wiring to a PLC input card. The timer (0.1-10 s) is built in, so no external timing relay is needed for delayed switching. IP67 and the internal heater mean the sensor can be mounted in washdown or cold environments (e.g., outdoor conveyor lines or food processing) without condensation issues.