Siemens PPU 26x.3 series Manual page 206

Connectable components
7.8 PP 72/48D PN and PP 72/48D 2/2A PN
Maximum current consumption: 3 x 4 A if all outputs are used simultaneously.
NOTICE
Protection against short-circuit
It is the user's responsibility to ensure that the max. current consumption per DOCOMx pin
(X111, X222, X333: Pins 47, 48, 49, 50) does not exceed 1 A. The power supply (24 VDC)
for the digital outputs must therefore be connected to all four pins per DOCOMx (X111, X222,
X333: pins 47, 48, 49, 50).
Analog inputs/outputs
An additional external power supply is not required for the analog inputs and outputs.
X1 pin assignment
This interface is intended exclusively for the connection of the external 24 V power supply.
Pin
1
2
3
On the module side, the power supplies are protected against:
● Polarity reversal
● Short-circuit (electrical current limiting of outputs)
● Overload (self-restoring PTC fuse)
Wiring the screw terminal block
The required 24 VDC load current supply is wired to the screw-type terminal block X1.
Protective separation
The 24 V direct voltage must be configured as an extra-low-voltage with protective separation
- DVC A or PELV.
Use flexible cables with a cross-section of 0.25 to 2.5 mm
the power supply according to the maximum current that flows. If you only use one wire per
connection, a ferrule is not required. You can use ferrules without an insulating collar according
to DIN 46228, Form A long version.
206
Signal name Signal type
P24 VI
M GND
PE GND
DANGER
Meaning
24 VDC power supply
Ground
Protective ground
(or AWG 23 to AWG 13) for wiring
2
Manual, 10/2015, 6FC5397-2DP40-5BA3
PPU and components