Siemens SIRIUS 3RM1 Manual page 176

Typical circuits
A.2 Typical circuits for safety-related shutdown
Risk from conductive contamination.
Can cause death, serious injury, or damage to property.
The devices must be protected against conductive contamination while taking account of
the ambient conditions. One way you can do this is to install the devices in a control cabinet
with the appropriate degree of protection. You will find further information in IEC 60529, for
example.
Safe functional extra-low voltage
Can cause death or serious injury.
The 3RM11/3RM13 Failsafe motor starters with a supply voltage of 24 V DC must be
operated with safe functional extra-low voltage (SELV, PELV). This means these modules
must only be subjected to a voltage of Um even in the event of a fault. The following applies
to these 3RM1 motor starters: Um < 60.0 V DC.
You will find more detailed information about safe functional extra-low voltage in the data
sheets of the power supplies to be used.
Loss of the safety function when the neutral conductor is connected to a load.
Can cause death or serious injury.
When using the 3RM11 Failsafe and 3RM13 Failsafe motor starters, note that no neutral
conductor may be connected if the load circuit contains 3-phase loads, e.g. a 230 V brake
or resistive loads.
NOTICE
Damage caused by electrostatic charge
When handling and installing the 3RM11/3RM13 Failsafe motor starters, ensure that the
components are protected against electrostatic charge. Changes to the system
configuration and wiring are only permissible in the voltage-free state.
Connection of 3RM11/3RM13 Failsafe motor starters is only permissible when the power
supply units (PELV and SELV) are switched off.
NOTICE
Electromagnetic interference
The following must be grounded in accordance with regulations to ensure noise immunity of
the 3RM11/3RM13 Failsafe motor starters:
• PELV / SELV power supply units (please also note the documentation for the respective
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WARNING
WARNING
WARNING
power supply unit in this regard).
SIRIUS 3RM1 motor starter
Manual, 06/2016, A5E0345285095020A/RS-AE/005