| Interface | ETHERNET | 
| Protocol | MODBUS TCP | 
| 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 last BYTE of the IP (00h to FFh) | 
| Analog inputs | 4 (configurable via software) | 
| Analog outputs | 2 (configurable via software) | 
| Digital inputs | 8 (24 VDC; delay time configurable via software) | 
| Digital outputs | 8 (24 VDC, 0.5 A max.) | 
| LED displays | For system displays, signal states, errors and power     supply | 
| External supply voltage | Via terminals ZP, UP and UP3 (process supply voltage     24 VDC) | 
| Required terminal unit | TU507 or TU508 TU507-ETH and TU508-ETH for ETHERNET Communication Interface Modules |