Encoder system connection 
10.2 Sensor Module Cabinet-Mounted SMC30 
258 
SINAMICS S120 Combi 
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5 
 
Table 10- 11  Technical data 
 
Voltage 
Current (without encoder system) 
Current (with encoder system) 
V
DC
 
A
DC
 
A
DC
 
24 (20.4 … 28.8) 
≤ 0.20 
≤ 0.55 
Encoder system power supply
 
Voltage 
V
DC
 
5 (with or without remote sense) 
1)
 or V
DC 
- 1 V 
Encoder frequency that can be evaluated 
encoder
kHz  ≤ 300 
2)
At the housing with M4/1.8 Nm screw 
A controller compares the encoder system supply voltage - sensed via the Remote Sense cables - with the reference
supply voltage of the encoder system, and adjusts the supply voltage for the encoder system at the output of the sensor
module until the required supply voltage is obtained directly at the encoder system (only for 5 V encoder system power
supply). Remote Sense only to X520.
2)
See the diagram "Maximum cable length depending on the SSI baud rate for SSI encoders"
Connectable encoder systems 
Table 10- 12  Specification of encoder systems that can be connected 
High signal level  
(TTL bipolar at X520 or X521/X531)
1)
U
Hdiff
  2  5  V 
Low signal level  
(TTL bipolar at X520 or X521/X531)
1)
U
Ldiff
  -5  -2  V 
High signal level 
(HTL unipolar) 
U
H
3)
  High  17  V
CC
  V 
CC
Low signal level 
(HTL unipolar) 
U
L
3)
 
High signal level 
2)
U
Hdiff
  3  V
CC
  V 
Low signal level 
2)
U
Ldiff
  -V
CC
  -3  V 
High signal level  
(SSI bipolar at X520 or X521/X531)
1)
U
Hdiff
  2  5  V 
Low signal level  
(SSI bipolar at X520 or X521/X531)
1)
U
Ldiff
  -5  -2  V