K48, Sensor Module Cabinet-Mounted Smc20; General Information; Safety Information - Siemens SINAMICS S120 Manual

Options

8.9 K48, Sensor Module Cabinet-Mounted SMC20

8.9 K48, Sensor Module Cabinet-Mounted SMC20
8.9.1

General information

Availability of option
This option is available for the following S120 Cabinet Modules:
● Booksize Cabinet Kits
● Chassis format Motor Modules
Description
The SMC20 Sensor Module is used to simultaneously detect the actual motor speed and the
path length. The signals emitted by the incremental encoder are converted here and made
available to the closed-loop controller via the DRIVE-CLiQ interface for evaluation purposes.
The following encoders can be connected to the SMC20 Sensor Module:
● Incremental encoder sin/cos 1 V
● EnDat and SSI absolute encoders
The motor temperature can also be detected using KTY84-130 temperature sensors or PTC
thermistors.
The maximum encoder cable length is 100 m.
Note
The Booksize Cabinet Kit with Double Motor Module has two of these encoder modules built
in.
8.9.2

Safety information

NOTICE
Only one measuring system can be connected to each Sensor Module.
Note
There must be no electrical connection between the measuring system housing and the
measuring system electronics (this requirement is fulfilled for most encoder systems).
If this is not carefully observed, under certain circumstances the system will not be able to
reach the required noise immunity (there is then a danger of equalization currents flowing
through the electronic ground).
346
pp
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A