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-type terminal block
The required 24 VDC load current supply is wired to the screw-type terminal block X1.
DANGER
Protective separation
The 24 V direct voltage must be congured as an extra-low-voltage with protective separation
- DVCA or PELV.
Use exible cables with a cross-section of 0.25 to 2.5 mm
2
(or AWG 23 to AWG 13) for wiring
the power supply according to the maximum current that ows.
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 12-16 Cable specication at X1
Characteristics Version
Connection option Up to 2.5mm
2
Current carrying capacity max. 10A
Max. cable length 10m
12.2.3.3 X2 PROFINET
Data Transmission Rate and Cables
For PROFINET, you require a data transmission rate of 100 Mbit/s (Fast Ethernet). The interfaces
are designed for full-duplex mode; in other words, the ports can both transmit and receive. For
data transfer purposes you can use electrical twisted copper cables (twisted pair, 4-wire,
100Base-T):
• The transmission characteristics of these cables must meet the requirements of CAT5.
• The maximum length of the connections between the end device and network component
or between two network components (e.g. switch ports) must not exceed 100m.
Connectable components
12.2PP 72/48D PN and PP 72/48D 2/2A PN
NCU 1750
Equipment Manual, 10/2023, A5E45627807B AH 123
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