Installation Of Misc. Connections - Danfoss VLT AQUA Drive Design Manual

5. How to Install
5.5.7. Motor Thermal Protection
The electronic thermal relay in the adjustable frequency drive has received UL approval for single
motor protection, when par. 1-90
current, I

5.6. Installation of misc. connections

5.6.1. RS-485 Bus Connection
One or more adjustable frequency drives can
be connected to a control (or master) using
5
the RS-485 standardized 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 adjustable frequency drive is
connected to a master, use parallel connec-
tions.
In order to avoid potential equalizing currents in the shield, ground the cable shield 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. For this purpose, set
switch S801 on the control card to "ON".
For more information, see the paragraph
5.6.2. How to Connect a PC to the VLT AQUA Drive
To control or program the adjustable frequency drive from a PC, install the MCT 10 Set-up soft-
ware.
The PC is connected via a standard (host/device) USB cable, or via the RS-485 interface as shown
in the
104
Motor Thermal Protection
is set to the rated motor current (see motor nameplate).
M,N
NOTE
Communication protocol must be set to FC MC par. 8-30.
How to Install > Installation of misc. connections
VLT AQUA Design Guide
NOTE
The USB connection is galvanically isolated from the supply voltage (PELV) and other
high-voltage terminals. The USB connection is connected to protection ground on
the adjustable frequency drive. Only use an isolated laptop as a PC connection to
the USB connector on the VLT AQUA Drive.
MG.20.N2.22 - VLT
ETR Trip
is set for
Switches S201, S202, and S801
® is a registered Danfoss trademark.
VLT ® AQUA Drive Design Guide
Motor
and par. 1-24
.
.