7.1.11 RS-485 Bus Connection
One or more frequency converters can be connected to a controller (or
master) using the RS-485 standard interface. Terminal 68 is connected
to the P signal (TX+, RX+), while terminal 69 is connected to the N signal
(TX-,RX-).
If more than one frequency converter is connected to a master, use par-
allel connections.
Illustration 7.9: Connection example.
In order to avoid potential equalizing currents in the screen, earth the cable screen via terminal 61, which is connected to the frame via an RC-link.
Bus termination
The RS-485 bus must be terminated by a resistor network at both ends. If the drive is the first or the last device in the RS-485 loop, set the switch S801
on the control card for ON.
For more information, see the paragraph
Switches S201, S202, and S801
.
7.1.12 How to Connect a PC to the Frequency Converter
To control or program the frequency converter from a PC, install the PC-based Configuration Tool MCT 10.
The PC is connected via a standard (host/device) USB cable, or via the RS-485 interface as shown in the
Design Guide, chapter How to Install > Installation
of misc. connections
.
NB!
The USB connection is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals. The USB connection is
connected to protection earth on the frequency converter. Use only isolated laptop as PC connection to the USB connector on the
frequency converter.
Illustration 7.10: For control cable connections, see section on
Control Terminals
.
7.1.13 PC Software Tools
PC-based Configuration Tool MCT 10
All Frequency converters are equipped with a serial communication port. provides a PC tool for communication between PC and frequency converter,
PC-based Configuration Tool MCT 10. Please check the section on
Available Literature
for detailed information on this tool.
MCT 10 set-up software
7 How to Operate the Frequency Converter
Automation VT Drive FC322
Instruction Manual
70
MG.20.U1.22
7
Содержание FC322 Series
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