NONDIRECT. OVERCURRENT RELAY CASE SIZE E8, 4 CT, 8 LEDS 19 BINARY INP./16 BINARY OUTP. MEASURING INPUT: 1/5A, 50/60HZ AUXILIARY VOLTAGE: 30 TO 220V DC, BINARY INPUT THRESHOLD 88V DC USB FRONT PORT, RS485 REAR PORT PLUS REAR OPT. ETHERNET DUPLEX PROTOCOL: IEC 60870-5-103 AND MODBUS RTU AND DNP 3.0 AND IEC 61850 (USER SELECTABLE SETTING) PROTECTION FUNCTION: STANDARD VERSION