How To Connect A Pc To The Frequency Converter - Danfoss FC 300 Design Manual

FC 300 Design Guide
Frame size F Requirements
The brake resistor(s) must be connected to the brake terminals in each inverter module.
8.7.4 RS 485 Bus Connection
One or more frequency converters can be connected to a control (or
master) using the RS485 standardized interface. Terminal 68 is connec-
ted 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.
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 RS485 bus must be terminated by a resistor network at both ends. For this purpose, set switch S801 on the control card for "ON".
For more information, see the paragraph
NB!
Communication protocol must be set to par. 8-30

8.7.5 How to Connect a PC to the Frequency Converter

To control the frequency converter from a PC, install the MCT 10 Set-up
Software.
The PC is connected via a standard (host/device) USB cable, or via the
RS485 interface as shown in the section
ming Guide.
NB!
The USB connection is galvanically isolated from the
supply voltage (PELV) and other high-voltage termi-
nals. 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.
Switches S201, S202, and S801 .
Protocol
.
Bus Connection
in the Program-
MG.33.BC.02 - VLT ® is a registered Danfoss trademark
Illustration 8.38: USB connection.
8 Electrical Installation
8
187