Siemens SINAMICS G130 Operating Instructions Manual page 83

X126: PROFIBUS connection
The PROFIBUS is connected by means of a 9-pin SUB D socket (X126). The connections
are electrically isolated.
Table 4- 18 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 -
A teleservice adapter can be connected to the PROFIBUS interface for remote diagnostics.
The power supply for the teleservice (terminals 2 and 7) can have a load of up to 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
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.
PROFIBUS connector
For the first and last participants in a bus line, the terminating resistors must be switched in,
otherwise, data transmission will not function correctly.
The terminating resistors are activated in the connector.
The cable shield must be connected at both ends and over a large surface area.
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
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
used between components in a system that are located at a distance from each other.
Meaning
Electrical installation
4.10 Signal connections
Range
0 V
RS485
TTL
5 V ± 10%
24 V (20.4 ... 28.8 V)
RS485
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