| Interface | 
PROFIBUSâ | 
| Protocol | 
PROFIBUSâ DP (DP-V0 and DP-V1) | 
| 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 PROFIBUSâ ID for configuration purposes (00h to FFh) | 
| Configurable digital inputs/outputs | 
8 (configurable via software) | 
| Digital inputs | 
8 (24 V DC; delay time configurable via software) | 
| Digital outputs | 
8 (24 V DC, 0.5 A max.) | 
| Fast counter | 
Integrated, configurable operating modes | 
| 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) |