Siemens SINAMICS G150 Operating Instructions Manual page 103

X126: PROFIBUS connection
The PROFIBUS is connected by means of a 9-pin SUB D socket (X126). The connections
are electrically isolated.
Table 4- 16 PROFIBUS interface X126
Pin
1 -
2 M24_SERV
3 RxD/TxD–P
4 CNTR–P
5 DGND
6 VP
7 P24_SERV
8 RxD/TxD–N
9 -
Note
A teleservice adapter can be connected to the PROFIBUS interface (X126) for remote
diagnosis purposes.
The power supply for the teleservice terminals 2 and 7 withstands a max. load and continued
short-circuit current of 150 mA.
No CAN cables must be connected to interface X126.
If CAN cables are connected, the Control Unit and other CAN bus nodes may be destroyed.
An equipotential bonding conductor with a cross-section of at least 25 mm² must be used
between components in a system that are located a considerable distance from each other.
If a potential bonding conductor is not used, high leakage currents that could destroy the
Control Unit or other PROFIBUS nodes can be conducted via the PROFIBUS cable.
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
Signal name
Not assigned
Power supply for teleservice, ground
Receive/transmit data P (B)
Control signal
PROFIBUS data reference potential
Supply voltage plus
Power supply for teleservice, + (24 V)
Receive/transmit data N (A)
Not assigned
CAUTION
CAUTION
Meaning
Electrical installation
4.10 Signal connections
Range
0 V
RS485
TTL
5 V ± 10%
24 V (20.4 ... 28.8 V)
RS485
101