Siemens SIMOTION C Operating Instructions Manual page 56

Interfaces
3.6 Onboard measuring system interface (C230-2, C240)
Signal forms of incremental encoders
Figure 3-9
Note
If you want to connect incremental encoders without zero signals, then you must connect the
corresponding pins in the connector with the encoder power supply:
Pin 10 with Pin 7 or 9 (MEXT)
Pin 11 with Pin 4 or 6 (P5EXT)
56
Signal forms of incremental encoders
SIMOTION C
Operating Instructions, 02/2012