Siemens SIMATIC ET 200eco PN M12-L System Manual page 50

Connecting
7.2 Operation on grounded/non-grounded infeed
Safe electrical isolation (SELV/PELV)
Power packs/power supply modules with safe electrical isolation SELV/PELV are necessary for
operating the ET 200eco PN M12‑L distributed I/O devices. These power supplies/power
supply modules must comply with IEC 61010-2-201 or IEC 60950-1.
The wiring of SELV/PELV circuits must be separated from the wiring of non-SELV/PELV circuits.
The insulation of all conductors must be dimensioned for the higher voltage.
NOTICE
Operation in damp / wet environment
When operating in a damp / wet environment, voltage limits apply for SELV/PELV andere
according to IEC 61010-2-201.
Configuring ET 200eco PN M12‑L with grounded reference potential (PELV)
When configuring the ET 200eco PN M12‑L distributed I/O devices with grounded reference
potential, occurring interference currents are discharged into functional earth. The
connections must be externally connected. Establish a connection between 1M or 2M and
functional earth.
Configuring ET 200eco PN M12‑L with non-grounded reference potential (SELV)
When configuring the ET 200eco PN M12‑L distributed I/O devices with grounded reference
potential, occurring interference currents are discharged into functional earth via an internal
RC network. You do not need external connection between 1M, 2M and functional earth.
Components and protective measures
Various components and protective measures are stipulated for setting up a complete plant.
The types of components and the degree to which the protective measures are mandatory
depend on the IEC regulation that applies to your plant setup.
The following table shows the components of the electrical configuration with reference to
the "Electrical configuration" figure below and compares the IEC regulations.
Table 7-1 Components of electrical configuration
Disconnection ele­
ment for controller,
sensors, and actuat­
ors
50
Reference to IEC 60364
illustration DIN VDE 0100
IEC 60364-4-41
①
VDE 0100 Part 460:
Main switch
IEC 60204
DIN VDE 0113
IEC 60204-1
VDE 0113 Part 1:
Disconnector unit according to
VDE 0113-1
Distributed I/O system ET 200eco PN M12-L
System Manual, 11/2023, A5E48753295-AG