| Number of channels per module | 
16 configurable inputs (24 V DC) | 
| Distribution of the channels into groups | 
1 (16 channels per group) | 
| Connections of the channels C0 to C15 | 
Terminals 1 to 16 | 
| Reference potential for the channels C0     to C15 | 
Terminal 20 (minus pole of the process voltage, name     ZP) | 
| Indication of the input signals | 
1 yellow LED per channel; the LED is ON when the input     signal is high (signal 1). The module is powered through the I/O-Bus. | 
| Input type according to EN 61131-2 | 
Type 1 sink | 
| Input signal range | 
+24 V DC | 
|   | 
Signal 0 | 
-3 V … +5 V | 
|   | 
Undefined signal | 
+5 V … +15 V | 
|   | 
Signal 1 | 
+15 V … +30 V | 
| Ripple with signal 0 | 
-3 V … +5 V | 
| Ripple with signal 1 | 
+15 V … +30 V | 
| Input current per channel | 
  | 
|   | 
Input voltage +24 V | 
Typ. 5 mA | 
|   | 
Input voltage +5 V | 
Typ. 1 mA | 
|   | 
Input voltage +15 V | 
> 2.5 mA | 
|   | 
Input voltage +30 V | 
< 8 mA | 
| Max. permissible leakage current (at 2-wire proximity     switches) | 
1 mA | 
| Input delay (0->1 or 1->0) | 
Typ. 8 ms | 
| Max. cable length | 
  | 
|   | 
Shielded | 
500 m | 
|   | 
Unshielded | 
300 m |