Siemens SINAMICS S120 Installation And Start-Up Manual page 156

SINAMICS Safety Integrated (Booksize)
Safe standstill (SH)
Note
The grouping must be identical in both monitoring channels.
If a fault in a drive results in a "Safe standstill (SH)", this does not automatically
mean that the other drives in the same group also switch to "Safe standstill (SH)".
The assignment is checked during the test for the shutdown paths, whereby the
operator selects "Safe standstill" for each group. The check is drive specific.
Example: terminal grouping for "Safe standstill (SH)"
It must be possible to select/deselect "Safe standstill" separately for group 1
(drive 1 and 2) and group 2 (drive 3 and 4).
In addition, the same grouping for "Safe standstill" must be assigned on both the
Control Unit and the Motor Modules.
Select/
deselect Select/deselect
SH
Group 2 Group 1
safety_sh_gruppe.vsd
Fig. 5-2 Example: terminal grouping for "Safe standstill (SH)"
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Control Unit
SH
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SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
M
EP
Drive 1
Drive 2
Line Single
Motor
Module
Module
Drive 3
Drive 4
Drive
1
Group 1
E Siemens AG, 2004. All rights reserved
M M M
EP EP EP
Double Single
Motor Motor
Module Module
Drive Drive
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Group 2