Siemens 3RK1308‑0 00‑0CP0 Series Equipment Manual page 50

Product features
5.8 Operating motor starters
Fail-safe input F-DI on the BaseUnit
The fail-safe input on the BaseUnit is designated as follows in the manual with "F-DI".
In the case of safety-related applications, control the F-DI on the BaseUnit from a safe
output.
NOTICE
Connection of the F-DI input of the BU-30-MS5 to BU-30-MS10 BaseUnits to surge filters
If your equipment makes it necessary to protect the contact against overvoltage, you have
to connect the F-DI input of the BU-30-MS5 to BU-30-MS10 BaseUnits to surge filters!
Refer to Chapter "Electromagnetic compatibility" in ET 200SP System Manual
(https://support.industry.siemens.com/cs/ww/de/view/58649293/en?dl=en).
Safety-related shutdown via the F-DI
Depending on peripherals 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.
50
WARNING
Motor starter (3RK1308‑0**00‑0CP0)
Equipment Manual, 11/2019, A5E34821005002A/RS-AC/003