X21 Profibus - Siemens SINAMICS S120 Manual

Control Units
6.2 Control Unit CU310 DP (PROFIBUS)
6.2.3.7

X21 PROFIBUS

Table 6-6 PROFIBUS interface X21
Pin
1
2
3
4
5
6
7
8
9
Type: 9-pin SUB-D female
Note
A teleservice adapter can be connected to the PROFIBUS interface (X21) 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.
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. If an
equipotential bonding conductor is not used, leakage currents that could destroy the
Control Unit or other PROFIBUS nodes can be conducted via the PROFIBUS cable.
PROFIBUS connector
At the first and last node (device) in a line, the terminating resistors must be switched-in in
order to ensure disturbance/noise-free communications.
The terminating resistors are activated in the connector.
The cable shield must be connected at both ends over large-surface area contacts.
182
Signal name Meaning
- Not assigned
M24_SERV Supply for teleservice, ground
RxD/TxD–P Receive/transmit data P (B)
CNTR–P Control signal
DGND PROFIBUS data reference potential
VP Power supply plus
P24_SERV Supply for teleservice, + (24 V)
RxD/TxD–N Receive/transmit data N (A)
- Not assigned
CAUTION
Manual, (GH6), 07/2007 Edition, 6SL3097-2AL00-0BP2
Range
0 V
RS485
TTL
5 V + -10 %
24 V (20.4 V -
28.8 V)
RS485
AC Drive