ARGUS-C NON DIRECT. OVERCURRENT RELAY 4 CT, 10 LEDS, 6 BINARY INPUTS/ 8 BINARY OUTP. MEASURING INPUT: 1/5A, 50/60HZ 80 TO 250V DC AUXILLIARY, BINARY INPUT THRESHOLD 88V 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: PUSH BUTTONS - DOWN AND RIGHT ARROWS PROTECTION FUNCTION: STANDARD VERSION