Siemens SINUMERIK ONE 6FC5317-5AA00-0AA0 - Connecting PROFIBUS DP; Disconnecting Stations from the PROFIBUS

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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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.
8.9.6 Disconnecting stations from the PROFIBUS
Removing the bus connector
You can remove the bus connector with a looped-through bus cable from the PROFIBUS DP
interface at any time without interrupting data tra󹪟c on the bus.
NOTICE
Data exchange on the bus can be interrupted!
A bus segment must always be terminated with the terminating resistor at both ends. This is
not the case, for example, if the last node with a bus connector is de-energized. Because the bus
connector takes its voltage from the node, this terminating resistor is ine󹪜ective.
Make sure that the nodes at which the terminating resistor is connected are always energized.
Connecting
8.9PROFIBUS DP
NCU 1750
Equipment Manual, 10/2023, A5E45627807B AH 81