Connecting The Power Supply - Siemens SIMATIC 6ES7158-3MU10-0XA0 Hardware Installation And Operating Manual

Connecting

4.3 Connecting the power supply

4.3 Connecting the power supply
Required tools
You need a screwdriver with a maximum blade width of 3.5 mm to connect the power
supply.
Power supply unit
Only SELV/PELV power supplies with safe, electrically isolated, safety extra-low voltage
(≤ 60V DC) may be used.
Note the permissible operating voltage as specified in the technical specifications (Page 125).
Redundant power supply
You have the option of supplying the PN/MF Coupler from two voltage sources (redundant
power supply):
• If one voltage source fails, the PN/MF Coupler automatically switches over to the other
voltage source.
• If voltage is applied to both connections (PS1 / PS2), the PN/MF Coupler automatically uses
the voltage source of PS1.
• If you only connect the PN/MF Coupler to one power supply, it is preferable to connect it
to PS1.
Note
You can evaluate the diagnostics to determine whether the PN/MF Coupler is connected to
both 24 V DC power supplies.
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Hardware Installation and Operating Manual, 07/2020, A5E50018670-AA
PN/MF Coupler