ARGUS-C NON DIRECT. OVERCURRENT RELAY 4 CT, 10 LEDS, 3 BINARY INPUTS/ 5 BINARY OUTP. MEASURING INPUT: 1/5A, 50/60HZ 24 to 60 V DC auxiliary, binary input threshold 19 V DC . USB FRONT PORT, RS485 REAR PORT (E4 CASE) PROTOCOL: IEC 60870-5-103 AND MODBUS RTU AND DNP 3.0 (USER SELECTABLE SETTING) FRONT COVER: NO PUSH BUTTONS PROTECTION FUNCTION: BASIC VERSION: BROKEN CONTUCTOR/LOAD UNBALANCED (46BC), INSTANTANEOUS PHASE FAULT OVERCURRENT (50), CIRCUIT BREAKER FAIL (50BF), INSTANT. EARTH FAULT (50G/50N), TIME DELAYED PHASE FAULT OVERCURRENT (51), TIME DEL. EARTH FAULT (51G/51N) CT SUPERVISION (60CTS), HIGH IMPEDANCE REF (64H), TRIP & CLOSE CIRCUIT SUPERVISION (74T&C)