Power Supply Connection; Requirements For The Power Supply - Siemens PPU 26x.3 series Manual

6.2

Power supply connection

6.2.1

Requirements for the power supply

Pin assignment at X1 screw-type terminal block
Pin
1
2
3
Requirements of DC power supplies
Interface X1 is intended exclusively for the connection of the external 24 V power supply, e.g.
● SITOP (stabilized 24 V power supplies)
● CSM (Control Supply Module)
The following power consumption values for the PPU provide a configuration basis for
calculating the 24 VDC power supply.
Parameter
Typical current consumption (PPU only: Processor, memory)
Max. current consumption (PPU with full load, e.g. USB, handwheels)
Maximum switch-on current
Risk of lightning strike
In the case of supply lines > 10 m, protectors must be installed at the device input in order to
protect against lightning (surge).
The DC power supply must be connected to the ground/shield of the Control Unit for EMC or
functional reasons. For EMC reasons, this connection should only be made at one point. As
a rule, the connection is provided as standard in the PLC I/Os. If this is not the case in
exceptional circumstances, the ground connection should be made on the grounding rail of
the control cabinet.
See also: "EMC Installation Guideline" Configuration Manual
PPU and components
Manual, 10/2015, 6FC5397-2DP40-5BA3
Signal name
P24
M
PE
DANGER
Signal type Meaning
VI 24 VDC power supply
VO Ground
GND Protective ground
Interface description
6.2 Power supply connection
Values
1.2 A
2.5 A
4.4 A
75