| AC Current Inputs | 5 A or 1 A phase and 5 A or 1 A neutral (setting-selectable) |
| AC Voltage Inputs | 300 Vac continuous, 600 Vac for 10 seconds |
| Inputs/Outputs | Standard includes 4 digital inputs, 5 digital outputs (1 Form C, 2 Form A Standard, 2 Form A Hybrid) |
| Digital Inputs Wetting | 4 internally wetted (24 Vdc) digital inputs Externally wetted universal binary digital inputs (24–250 Vdc/Vac; setting-selectable) |
| Frequency and Phase Rotation | System frequency: 50, 60 Hz Phase rotation: ABC, ACB Frequency tracking: 15–70 Hz |
| Arc-Flash Time-Overlight Elements (TOL1–TOL4) | Pickup time: 1 ms (including output operation when hybrid contact is used) Dropout time: 16 ms |
| Communications Protocols | Standard protocols include SEL protocols, Modbus RTU, Modbus TCP, Mirrored Bits communications, Telnet, the File Transfer Protocol (FTP), TCP/IP, HTTP/HTTPS web server communications, and the Simple Network Time Protocol (SNTP). Optional protocols include IEC 61850 Edition 2 and DNP3 serial and LAN/WAN. |
| Communications Ports | USB-C front-panel port 10/100BASE-T single or dual Ethernet rear port EIA-232/EIA-485 rear port with IRIG-B |
| Universal Power Supply | 24–250 Vdc/110–240 Vac |
| Operating Temperature | –40° to +85°C (–40° to +185°F) |