Installation Of Misc. Connections - Danfoss VLT AQUA Design Manual

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VLT AQUA Drive Design Guide
5.5.6. Direction of Motor Rotation
The default setting is clockwise rotation with the frequency converter
output connected as follows.
Terminal 96 connected to U-phase
Terminal 97 connected to V-phase
Terminal 98 connected to W-phase
Thedirection of motor rotation is changed by switching two motor phases.
5.5.7. Motor Thermal Protection
The electronic thermal relay in the frequency converter has received the UL-approval for single motor protection, when par. 1-90
tection ETR Trip
is set for and par. 1-24

5.6. Installation of misc. connections

5.6.1. 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 FC MC par. 8-30.
Motor current, I
is set to the rated motor current (see motor name plate).
M,N
Switches S201, S202, and S801
.
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MG.20.N3.02 - VLT is a registered Danfoss trademark
5. How to Install
5
Motor Thermal Pro-
105