The Sensor Module Relay R20AF from ETC is a dual, plug-in mechanical relay assembly for use in both Sensor+ and Unison Dimming Series modular dimmer racks. Applications include High Intensity Discharge Ballasts (Metal Halide and High-Pressure Sodium), non-dimmed on/off loads, motors, power for fans and standard outlets, moving lights, fog machines and other powered effects. The R20AF provides two electrically held relays that allow designers to mix and match dimmer and relays for control of diverse loads.