Siemens SIRIUS 3RK3 - Grounding

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Figure 5-25 Connecting the memory module
Note on the memory module
If you connect a memory module to a 3RK3 Basic, Advanced, ASIsafe basic or ASIsafe extended
central unit on which a con󹪝guration was released by a di󹪜erent safety relay, this cancels the
con󹪝guration release. In this case, adapt the con󹪝guration, upload it to the device and release
it.
If you connect a memory module to a 3SK2 safety relay (45 mm width) on which a
con󹪝guration has already been released for another safety relay, e.g. MSS 3RK3, a con󹪝guration
error is returned and the device remains in con󹪝guring mode.
5.3.3.10 Grounding
WARNING
Hazardous Voltage
Can Cause Death, Serious Injury, or Property Damage.
Before grounding or wiring an electrical device, you must ensure that the power supply for the
device is switched o󹪜. Ensure that all the connected devices are also switched o󹪜.
Grounding measures
All electrical devices must be grounded and wired properly not only to ensure that your system
functions as smoothly as possible but also to provide additional noise immunity for your
application.
The following components must be grounded:
• FE contacts of the devices, if present
• The shield, if shielded sensor and actuator cables are used
Description of the hardware
5.3 Connecting / wiring
SIRIUS 3RK3 Modular Safety System
158 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006