Siemens SINAMICS DCM Operating Instructions Manual page 184

Additional system components
7.2 Sensor Module Cabinet-Mounted SMC30
Connection example 2: HTL encoder, unipolar, with reference signal
Figure 7-4
Because the physical transmission properties are more robust, the bipolar connection
1)
should always be used. The unipolar connection should only be used if the encoder type
does not output push-pull signals.
182
Connection example 2: HTL encoder, unipolar, with reference signal
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
1)
SINAMICS DCM DC Converter