| Interface | 
Ethernet | 
| Protocol | 
PROFINETâ IO RT | 
| Power supply | 
from the process supply voltage UP | 
| Supply of the electronic circuitry of the I/O expansion     modules attached | 
through the expansion bus interface (I/O-Bus) | 
| Rotary switches | 
for setting the IO Device identifier for configuration     purposes (00h to FFh) | 
| Analog inputs | 
4 (configurable via software) | 
| Analog outputs | 
2 (configurable via software) | 
| Digital inputs | 
8 (24 V DC; delay time configurable via software) | 
| Digital outputs | 
8 (24 V DC, 0.5 A max.) | 
| LED displays | 
for system displays, signal statuses, errors and power     supply | 
| External supply voltage | 
via terminals ZP, UP and UP3 (process supply voltage     24 V DC) |