| Interface | 
RS485, CS31 protocol | 
| Address switches | 
For setting the module’s address (00d     to 99d) | 
| Digital inputs | 
8 (24 V DC; delay time configurable via software) | 
| Configurable digital inputs/outputs | 
8 (24 V DC, 0.5 A max.) | 
| Analog inputs | 
4 (configurable via software), resolution 12 bits plus     sign, voltage, current and RTD input | 
| Analog outputs | 
2 (configurable via software), resolution 12 bits plus     sign, voltage and current output | 
| Fast Counter | 
Integrated, many configurable operating modes | 
| LED displays | 
For system displays, signal statuses, errors and power     supply | 
| External supply voltage | 
Via terminals UP and ZP (process supply voltage 24 V     DC) |