Siemens SIMATIC S7-1500 System Manual page 32

System overview
2.5 Components
C o m p o n e n ts
System power supply
(PS)
Load current supply
(PM)
Reference
You can find additional information on the different function classes (for example, basic,
standard) of the interface and I/O modules in FAQ in Internet
(https://support.industry.siemens.com/cs/de/de/view/109476914/en).
32
The system power supply is a diagnostics-capable power supply
module, that can be connected with the backplane bus using a U
connector.
A system power supply is required, if the power fed from the
CPU/interface module into the backplane bus is not sufficient to sup-
ply the connected modules with power.
System power supplies are available in various models:
PS 25W 24V DC
•
PS 60W 24/48/60V DC
•
PS 60W 120/230V AC/DC
•
A power cable connector with coding element and U connector is
included in the scope of delivery of the system power supply and may
be ordered as spare part.
The system power supply (PS), central modules (CPU), and input and
output circuits of the I/O modules are supplied with 24 V DC through
the load current supply (PM).
If you are using load current supplies, we recommend the devices
from our SIMATIC series. These devices can be mounted on the
mounting rail.
Load current supplies are available in various models:
PM 70W 120/230V AC
•
PM 190W 120/230V AC
•
Fu n cti o n D i a g ra m
Automation system
System Manual, 09/2016, A5E03461182-AD