Rs485 Bus Connection; Connection To A Pc - Danfoss VLT AAF006 Operating Instructions Manual

User Interface Operating Instructions

5.1.10 RS485 Bus Connection

A frequency converter or active filter can be connected to
a controller (or master) together with other loads using the
RS485 standard interface. Terminal 68 is connected to the
P signal (TX+, RX+), while terminal 69 is connected to the
N signal (TX-, RX-).
To avoid potential equalising currents in the screen,
ground the cable screen via terminal 61, which is
5 5
connected to the frame via an RC-link.
Bus termination
Terminate the RS485 bus via a resistor network at both
ends. If the unit is the first or the last device in the RS485
loop, set the switch S801 on the control card to ON.

5.1.11 Connection to a PC

To program the unit from a PC, install the PC-based
configuration tool MCT 10 Set-up Software.
The PC is connected via a standard (host/device) USB cable
to the unit, or via the RS485 interface.
NOTICE
The USB connection is galvanically isolated from the
supply voltage (PELV) and other high-voltage terminals.
The USB connection is connected to protective ground
on the unit. Use only an isolated laptop as PC
connection to the USB connector.
For control cable connections, see chapter 4.2.16 Electrical
Installation, Control Cables.
Illustration 5.12 Control Cable Connections
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