Functionality

Interface	Ethernet
Protocol	PROFINETâ IO RT
Serial Interfaces	3 Serial UART interfaces RS-232, RS-422 and RS-485 available as physical layer
Serial protocol	ASCII
I/O Bus interface	For up to 10 AC500 I/O Modules
Rotary switches	For setting the IO Device identifier for configuration purposes (00h to FFh)
LED displays	For system displays, field bus indication, errors and power supply
Power supply	Via terminals UP and ZP (process supply voltage 24 V DC)