Siemens Sinamics G120 CU240E Operating Instructions Manual page 116

Functions
5.7 Closed-loop control
Use a shielded cable to connect the speed encoder. The shield must not be interrupted by
terminal points between the encoder and frequency inverter.
Setting the encoder voltage
The encoder voltage is set using the DIP switches at the front of the CU. If you use either a
BOP or a PC Connection Kit, you must remove this module in order to be able to access the
switches.
Table 5- 27
Encoder type
No encoder
TTL encoder
Supply voltage: 5 V
HTL encoder
Supply voltage: 24 V
If DIP switch 3 is set to ON (24 V), a TTL encoder (voltage level 5 V) must not be
connected to the frequency inverter.
116
CAUTION
Encoder voltage settings
DIP switches 1 and 2 are of no significance when setting the encoder voltage
WARNING
Setting of the DIP switches at the front of the CU
2 3
2 3
2 3
Operating Instructions, 08.10. 2008, t.b.d.
4 5 6 7
4 5 6 7
4 5 6 7
Frequency inverter