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Connectable components
12.2 PP 72/48D PN and PP 72/48D 2/2A PN
The required 24 V DC load power supply is wired to the screw-type terminal block (X1). Use
flexible cables with a cross-section of 0.25 to 2.5 mm
power supply according to the maximum current that flows.
Note
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.
Table 12-14
Characteristics
Connection option
Current carrying capacity
Maximum cable length
Digital outputs
To supply (24 V DC) the digital outputs, an additional external power supply source is required.
The power supply is connected to terminals X111, X222 and X333 via pins 47, 48, 49 and 50
(DOCOMx). Ground pins must be connected to a common chassis ground.
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 V DC) for
the digital outputs must therefore be connected to all 4 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.
Wiring the power supply
This interface is intended exclusively for the connection of the external 24 V power supply.
Table 12-15
Pin
1
2
3
122
Requirements for digital inputs
Pin assignment at X1 screw-type terminal block
Signal name
Signal type Meaning
P24
VI
M
GND
PE
GND
2
(or AWG 30 to AWG 12) for wiring the
Value
Up to 2.5 mm2
Max. 10 A
10 m
24 V DC power supply
Ground
Protective ground
Equipment Manual, 10/2023, A5E45627807B AH
NCU 1750
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