Ethernet/rear serial options: single 10/100BASE-T Ethernet, EIA-232 rear
Protocols: Modbus RTU, SEL ASCII and Compressed ASCII, SEL Fast Meter, Fast Operate, Fast SER, SEL Fast Message, Ymodem File Transfer, SEL Mirrored Bits, Event Messenger, and EtherNet/IP
4 digital input (DI)/4 digital output (DO) fast high-current hybrid (SELect 4 DI/4 DO); 125 Vdc/Vac DI
3-phase ac current input (ACI)/3-phase ac voltage input (AVI) (300 Vac) and Vsync input (SELect 3 ACI/4 AVI)
3-phase ACI/neutral ACI/3-phase AVI (300 Vac) (SELect 4 ACI/3 AVI)