Buy EG-4 – IP Control Buddy i/o (no buttons) EG-4 online at Qvest Store Australia. IP Control Buddy – I/O Unit (No buttons) – I/O: Serial (RS232/RS422), 4xGPI, 4xGPO, Power over Ethernet. GPI & Serial to Ethernet Converter – mounts into the EB4X-RT 1RU panel or the EG4-RT, 19″ rack tray that holds eight units. Unit operates on POE, power supply not included; optional external power supply order PS-IPCB.