Siemens SINAMICS G120 Operating Instructions Manual page 166

Commissioning (software)
5.10 Encoder Commissioning
The encoder voltage is using the general I/O DIP switches 3 and 4.
The following table shows the possible settings:
Table 5-43
Encoder supply
Warning
DIP switches 3 and 4 in ON position provide a supply voltage of 24 V to the encoder.
Therefore it is not allowed to connect a TTL encoder to the inverter if both DIP switches, 3
and 4 are in ON position.
5-110
Encoder voltage settings
On
OFF
3
voltage
Encoder type No encoder
4 3 4
0 V 24 V
HTL encoder
3 4
5 V
TTL encoder
Operating Instructions, 11/2006, A5E00766042B AA
3 4
24 V
HTL encoder
Control Units CU240S