Siemens SINAMICS S120 - Page 207

Hardware
6.2 Interfaces
Hydraulic Drive
System Manual, 04/2015, 6SL3097-4BA00-0BP1
207
Reduction in the permissible total current drain when additional encoders are connected
When additional encoders are connected, the permissible total current drain (0.9 A) of the
DRIVE-CLiQ interfaces is reduced.
● Connecting SSI encoders (24 V)
The HLA module provides 900 mA to connect encoders. This current must be distributed
across the connected encoders.
– Example
A 24 V SSI encoder has a current drain of 150 mA; this means that 750 mA still
remains available for DRIVE-CLiQ encoders.
● Connecting TTL encoders (5 V encoder power supply with remote sense)
The permissible total current drain of DRIVE-CLiQ interfaces is reduced by 0.5 x current
drain of the connected encoder.
–
Example
An additional TTL encoder at axis 2 with 200 mA current drain reduces the permissible
total current drain for all DRIVE-CLiQ interfaces by 100 mA from 0.9 A down to 0.8 A.