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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.
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.
Table 12-16
Characteristics
Connection option
Current carrying capacity
Max. cable length
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 100 m.
NCU 1750
Equipment Manual, 10/2023, A5E45627807B AH
DANGER
Cable specification at X1
Connectable components
12.2 PP 72/48D PN and PP 72/48D 2/2A PN
(or AWG 23 to AWG 13) for wiring
2
Version
Up to 2.5 mm
2
max. 10 A
10 m
123
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