Power Supply Connection; Requirements For The Power Supply - Siemens SINUMERIK ONE PPU 1740 Series Equipment Manual

7.2

Power supply connection

7.2.1

Requirements for the power supply

Pin assignment 4-pin screw-type connector
Pin
+/-
+/-
M
M
Signal: VI - voltage input; VO - voltage output
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
60612658/en)" Configuration Manual.
PPU 1740
Equipment Manual, 01/2019, A5E47615272B AA
Signal name
P24
P24
M
M
DANGER
Signal type Meaning
VI 24 VDC power supply (bridged)
VI
VO Protective ground (bridged)
VO
(https://support.industry.siemens.com/cs/de/de/view/
Interface description
7.2 Power supply connection
Values
2.4 A
8 A
8 A
65