Permissible And Prohibited Applications - Siemens SINAMICS G120 Function Manual

Description
2.2 Preconditions and constraints
2.2.2

Permissible and prohibited applications

The safety function STO may be used without any restrictions in all applications.
Suspended loads
If the motor can be accelerated by the mechanical system of the connected machine part
after the motor has been switched off, encoderless safety functions SS1, SLS, SSM and
SDI must not be used.
Whether or not a mechanical brake is installed is irrelevant here.
Examples:
1. For the hoisting gear of a crane, the suspended load can accelerate the motor as soon as
2. A horizontal conveyor is always braked to a standstill due to friction as soon as the motor
18
WARNING
the motor is switched off. In this case, encoderless safety functions SS1, SLS, SSM and
SDI are not permissible.
Even if the mechanical brake of the hoisting gear is applied after the motor has been
switched off, this is of no significance regarding the fact that safety functions SS1, SLS,
SSM and SDI are prohibited in this application.
is switched off. In this case, encoderless safety functions SS1, SLS, SSM and SDI can be
used without any restrictions.
WARNING
PM240 FSGX Power Module
Encoderless safety functions SS1, SLS, SSM and SDI must not be used in conjunction
with the PM240 FSGX Power Module.
Safety Integrated Function Manual, SINAMICS G120 and G120C
Function Manual, 01/2011, FW 4.4, A5E03052391B AB