Encoder System Connection; Sensor Module Cabinet-Mounted Smc20; Description; Safety Information - Siemens SINAMICS S120 Combi User Manual

Encoder system connection

11.1

Sensor Module Cabinet-Mounted SMC20

11.1.1

Description

The Sensor Module Cabinet-Mounted SMC20 evaluates encoder signals and transmits the
speed, actual position value, rotor position and, if necessary, the motor temperature and
reference point via DRIVE-CLiQ to the S120 Combi.
The SMC20 is used to evaluate encoder signals from incremental encoders with SIN/COS (1
Vpp) or absolute encoders with EnDat 2.1 or SSI.
11.1.2

Safety information

The ventilation spaces of 50 mm above and below the component must be observed.
NOTICE
Only one encoder system may be connected per Sensor Module.
Note
There must be no electrical connection between the encoder system housing and the signal
cables, or the encoder system electronics. If this is not carefully observed, under certain
circumstances the system will not be able to reach the required interference immunity level
(there is then a danger of equalization currents flowing through the electronics ground).
Connecting cables to temperature sensors must always be installed with shielding. The
cable shield must be connected to the ground potential at both ends over a large surface
area. Temperature sensor cables that are routed together with the motor cable must be
twisted in pairs and shielded separately.
SINAMICS S120 Combi
Manual, Edition 07/2012, 6SL3097-4AV00-0BP3
WARNING
CAUTION
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