Siemens SINAMICS G120P, Operating Instructions Manual

Page: 84 / 496

Electrical installation
4.8 Signal connections
Inverter cabinet units
84
Operating Instructions, 12/2014, A5E32923362A
X126: PROFIBUS connection
The PROFIBUS is connected by means of a 9-pin SUB D socket (X126). The connections
are electrically isolated.
Table 4- 19 PROFIBUS interface X126
Pin Signal name Significance Range
1 - Not assigned
2 M24_SERV Power supply for teleservice, ground 0 V
3 RxD/TxD–P Receive/transmit data P (B) RS485
4 CNTR–P Control signal TTL
5 DGND PROFIBUS data reference potential
6 VP Supply voltage plus 5 V ± 10%
7 P24_SERV Power supply for teleservice, + (24 V) 24 V (20.4 ... 28.8 V)
8 RxD/TxD–N Receive/transmit data N (A) RS485
9 - Not assigned
Note
Remote diagnostics
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.
NOTICE
Damage to the Control Unit or other PROFIBUS nodes due to high leakage currents
Significant leakage currents can flow along the PROFIBUS cable if a suitable equipotential
bonding conductor is not used and destroy the Control Unit or other PROFIBUS nodes.
•
An equipotential bonding conductor with a cross-section of at least 25 mm² must be
used between components in a system that are located at a distance from each other.
NOTICE
Damage to the Control Unit or other CAN bus nodes due to the connection of a CAN cable
If a CAN cable is connected to the X126 interface, this can destroy the Control Unit or other
CAN bus nodes.
•
Do not connect any CAN cables to the X126 interface.