Siemens SINAMICS G150 - Page 101

Electrical installation
4.9 Signal connections
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
101
Note
Ensuring the function of digital inputs
An open input is interpreted as "low".
To enable the digital inputs (DI) to function, terminal M2 must b
e connected.
This is achieved through one of the following measures:
1.
Also route the reference ground of the digital inputs.
2.
A jumper to terminal M. (
Note:
This removes the electrical isolation for these digital
inputs.)
Note
If the 24 V supply is brief
ly interrupted, then the digital outputs are deactivated during this
time.
X126: PROFIBUS connection
The PROFIBUS is connected by means of a 9-pin SUB D socket (X126). The connections
are electrically isolated.
Table 4- 12 PROFIBUS interface X126
Pin
Signal name
Meaning
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
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.