ABB RXSF1 is an auxiliary signaling and interposing relay designed for ABB automation systems, operating from a DC coil rated 110–125 V. It provides 2 normally open (NO) and 1 normally closed (NC) contacts and includes a self-reset flag indicator to show when the relay has energized and reset. The coil current specification calls for a pickup current greater than 25 mA and a dropout current greater than 15 mA, with immunity to AC voltages induced across the coil up to 150 V AC; the maximum energizing time is 10 seconds every 2 minutes. The module weighs about 0.4 kg and is used in SCADA interposing and signaling applications in industrial control environments.
