Siemens SINUMERIK ONE NCU 1740 - Connecting PROFIBUS DP

Supplementary conditions
During laying of the indoor bus cable, you must also consider the following supplementary
conditions (d
O
= outer diameter of the cable):
Table 8-17 Supplementary conditions for the laying of PROFIBUS cables
Characteristics Supplementary conditions
Bending radius for a single bend 80 mm (10xd
O
)
Bending radius (multiple times) 160 mm (20xd
O
)
Permissible temperature range for cable routing -5° C to +50° C
Temperature range for storage and stationary operation -30° C to +65° C
8.9.5 Connecting PROFIBUS DP
Introduction
PROFIBUS cables are connected to the X126 interface via a bus connector.
Wiring the bus connector
1. Proceed as follows to connect the bus connector:
2. Plug the bus connector into the corresponding interface on the NCU.
3. Screw the bus connector into place.
As the NCU is located at the start or end of a segment, you must switch on the terminating
resistor ("ON" switch setting).
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RII
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RII
Figure 8-7 Terminating resistor switched on and o󹪜
Note
Make sure that the stations on which the terminating resistor is located are always supplied
with voltage during ramp-up and operation.
Connecting
8.9 PROFIBUS DP
NCU 1740
Equipment Manual, 10/2021, A5E51087503B AA 77