Parameters Category Parameter Typical Specification / Value for REF615C-C General Product Level "C" (Control) Hardware Variant -C (Specific I/O & Comm Configuration) Standards Compliance IEC 60255, IEC 61850, IEEE C37.90, IEC 61000-4 (EMC) Power Supply Operational Voltage Common Ranges: 24-48 V DC, 48-110 V DC, 110-250 V DC, or 110-230 V AC (Ordering code specific) Inputs Current Inputs (Iₙ) 1 A or 5 A (Defined by hardware ordering code) Voltage Inputs (Uₙ) 100-120 V or 190-230 V line-to-neutral (via Voltage Transformers) Binary Inputs (BI) Typically 16 (Configurable in groups for 24-250V DC / 110-230V AC) Outputs Output Relays Trip/Close (PO): Typically 6 (High-capacity) Signal/General (BO): Typically 8 Human-Machine Interface Display Standard LCD with status LEDs Local Control Basic navigation keypad Communication Primary Protocol IEC 61850-8-1 (MMS & GOOSE) Serial Protocols IEC 60870-5-103, Modbus RTU Optional Protocol DNP3 (Serial or over Ethernet) Physical Ports 1 x Electrical Ethernet (RJ-45), 1 x Optical Ethernet (ST), 2 x RS485 Serial Ports Core Protection Functions (ANSI) Overcurrent 67 (Dir. OC), 50/51 (Inst./Time OC), 50N/51N (Inst./Time EF), 67N (Dir. EF) Other Protection 27 (Undervoltage), 59 (Overvoltage), 49 (Thermal Overload), 79 (Autoreclosing), 81U/f (Frequency), 46 (Unbalance) Environmental Operating Temperature -25°C to +70°C (Standard industrial range) Housing Compact, IP40/IP52, for panel mounting.