Technical data

CU230P-2 Control Units, Getting Started
8 A5E02484096, 05/2009
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Figure Communication network via RS485
Note
For Modbus RTU
Two 100-kΩ resistors are provided for polarizing the A&B cable.
3.5 Connecting CU230P-2 DP to the PROFIBUS DP network
Description
This section describes how the inverter is physically connected to a PROFIBUS
DP bus system. The communication settings are described in the Control Unit
operating instructions in the section "Communication over PROFIBUS DP".
The Control Unit CU230P-2 DP has a 9-pin sub D connector to the PROFIBUS
standard underneath the Control Unit for integrating the inverter into the
PROFIBUS DP fieldbus system. This connector has short-circuit-proof, isolated
pins. You will find the pin assignments in the following table.
Note: The PROFIBUS modules do not have any integrated bus terminating
resistors.
X
XY
Z
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Table 2 Pin assignments for the 9-pin sub D connector (socket)
Contact Designation Description
1 PE / shield Ground connection
2 --- ---
3 DPB Data P receive/transmit (B/B’)
4 RTS Control signal
5 0 V Reference potential for PROFIBUS data (C/C’)
6 5V Supply voltage plus
7 --- ---
8 DPA Data N receive/transmit (A/A’)
9 --- ---
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Enclosure PE / shield Cable shield