
Functions
5.11 Operation in fieldbus systems
Frequency inverter
160
Operating Instructions, 08.10. 2008, t.b.d.
5.11.2
Communication via PROFIBUS and PROFINET
5.11.2.1
Connect the frequency inverter to PROFIBUS
Assignment of the SUB-D connector to connect to the PROFIBUS-DP network
Control Units CU240S DP and CU240S DP-F of the frequency converter are equipped with a
SUB D connection for the PROFIBUS cable.
Table 5- 55 Contact assignment of the 9-pole SUB D connection
Contact
Designation
Description
Area
1
Shielding
Ground connection
2
U0V
Floating and reference point for user
supply
3
RxD/TxD-P
Receive/transmit data P (B/B’)
RS 485
4
CNTR-P
Control signal
TTL
5
DGND
Reference potential for PROFIBUS
data (C/C’)
6
VP
Plus pole for supply voltage
5 V ± 10 %
7
U24V
Floating user 24 V at 100 mA
8
RxD/TxD-N
Receive/transmit data N (A/A’)
RS 485
9
-
Not assigned
Housing
Cable shield
Cable shield
The SUB D connection is suitable for the SIMATIC RS 485 bus connector.
Recommended PROFIBUS connectors
We recommend one of the following connectors for the PROFIBUS cable:
1.
6GK1500-0FC00
2.
6GK1500-0EA02
Both connectors are suitable for all SINAMICS G120 Control Units with respect to the angle
of the outgoing cable.
Note
PROFIBUS communication when the 400 V supply for the frequency inverter is switched off
If the frequency inverter is only supplied via the 400 V line connection for the Power Module,
the PROFIBUS connection for the Control Unit is interrupted as soon as the power supply is
disconnected. To prevent this, the Control Unit must be connected to a separate 24 V power
supply via terminals 31 (+24 V I
n
) and 32 (0 V I
n
).