| Number of channels per module | 
Max. 8 | 
| Distribution of channels into groups | 
1 group of 8 channels | 
| Connections of the channels I0+ to I7+ | 
Terminals 2.0 to 2.7 | 
| Reference potential for the inputs | 
Terminals 1.9, 2.9, 3.9 and 4.9 (ZP) | 
| Input signal delay | 
typ. 8 ms, configurable from 0.1 to 32 ms | 
| Indication of the input signals | 
1 LED per channel | 
| Input signal voltage | 
24 V DC | 
|   | 
signal 0 | 
-30 V…+5 V | 
|   | 
undefined signal | 
+5 V … +13 V | 
|   | 
signal 1 | 
+13 V…+30 V | 
| Input current per channel | 
  | 
| input voltage +24 V | 
typ. 7 mA | 
| input voltage +5 V | 
typ. 1,4 mA | 
| input voltage +15 V | 
typ. 4,3 mA | 
| input voltage +30 V | 
< 9 mA | 
| input resistance | 
ca. 3,5 kΩ |