Communication Via Profibus Dp; Profibus Connection - Siemens SINAMICS Series Operating Instructions Manual

10.4

Communication via PROFIBUS DP

10.4.1

PROFIBUS connection

Electric shock during connection while voltage is present
When connecting the PROFIBUS cable while voltage is present, there is a danger of
coming into contact with live components behind the terminal.
Touching live components can result in death or serious injury.
• Only connect the PROFIBUS cable to connector X126 when the unit is in a de-
Position of PROFIBUS connection and diagnostics LEDs
The PROFIBUS connection and diagnostics LEDs are located on the Control Unit (CUD).
The PROFIBUS connection is via a 9-pin Sub-D socket X126. The connections are
electrically isolated.
See also Figure 6-44 Terminal/connector arrangement on the "Control Unit (CUD)"
(Page 156) and Chapter "Description of the LEDs on the CUD (Page 635)".
PROFIBUS connection
Table 10- 33 PROFIBUS connector assignment
Connector Pin
X126
1
2
3
4
5
6
7
8
9
"Control Unit (CUD)" module
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
WARNING
energized state.
Signal name
-
-
RxD/TxD-P
CNTR-P
DGND
VP
-
RxD/TxD-N
-
10.4 Communication via PROFIBUS DP
Technical specifications
Not assigned
Not assigned
RS485 receive/transmit data P (B)
Control signal (TTL)
PROFIBUS data ground
Positive supply voltage (5 V +/-10%)
Not assigned
RS485 receive/transmit data N (A)
Not assigned
Descriptions of functions
455