Siemens 3RK1308‑0 00‑0CP0 Series Equipment Manual page 212

Circuit examples
B.2 Connection examples for fail-safe motor starters
Group shutdown
With the BaseUnits BU30-MS7 to BU30-MS10, a group shutdown can be implemented with
the aid of the F-DI.
The group shutdown in SIL3 Cat 4 PL e is only possible with fail-safe control modules with
pp-switching. A group shutdown is also possible by a fail-safe shutdown of the supply
voltage with all motor starter BaseUnits.
Safety-related shutdown using the F-DI
Depending on the I/O used, the shutdown takes place via one or two output channels
(terminals):
• PM-switching: The shutdown takes place via two output channels.
• PP-switching: The shutdown takes place via one output channel.
Shutdown via one output channel (PP switching) achieves SILCL 3 according to EN 62061,
PL e/Cat. 4 according to EN ISO 13849-1 if steps are taken to ensure that the cables are
installed in such a way that they are protected against a cross-circuit/line-to-line fault.
For the BU-30-MS7 to BU-30-MS10 F-DI forwarding BaseUnits, only PP switching is
possible.
For the single F-DI BaseUnits BU-30-MS5 and BU-30-MS6, PM and PP switching are
possible.
212
WARNING
Motor starter (3RK1308‑0**00‑0CP0)
Equipment Manual, 11/2019, A5E34821005002A/RS-AC/003