Connecting Profibus Dp - Siemens SINUMERIK ONE NCU 1740 Equipment Manual

Supplementary conditions
During laying of the indoor bus cable, you must also consider the following supplementary
conditions (d
Table 8-17
Characteristics
Bending radius for a single bend
Bending radius (multiple times)
Permissible temperature range for cable routing
Temperature range for storage and stationary operation
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).
Figure 8-7
Note
Make sure that the stations on which the terminating resistor is located are always supplied
with voltage during ramp-up and operation.
NCU 1740
Equipment Manual, 10/2021, A5E51087503B AA
= outer diameter of the cable):
O
Supplementary conditions for the laying of PROFIBUS cables
Terminating resistor switched on and off
8.9 PROFIBUS DP
Supplementary conditions
80 mm (10xd )
O
160 mm (20xd )
O
-5° C to +50° C
-30° C to +65° C
Connecting
77