Vlt 2800 Earth Connection; Vlt 2800 Devicenet Connection - Danfoss VLT 2800 Manual

I VLT 2800 Earth Connection
It is important that all stations connected to the
DeviceNet network are connected to the same earth
potential. The earth connection must have a low HF
(high frequency) impedance. This can be achieved
by connecting a large surface area of the cabinet to
ground, for example by mounting the VLT frequency
converter on a conductive rear plate. Especially
when having long distances between the stations
in a DeviceNet network it can be necessary to use
additional potential equalizing cables, connecting the
individual stations to the same earth potential.
I VLT 2800 DeviceNet Connection
It is essential that the bus line be terminated properly.
A mismatch of impedance may result in reflections
on the line that will corrupt data transmission.
The DeviceNet control card is provided with
a pluggable connector.
By using a pluggable connector as a splice between
two trunk lines, removal of devices will not sever the
network. Strain relief, if required, must be provided by
the developer. In current installations of this type of
connector, the strain relief is attached to the product.
NB!:
Wires should not be installed while the
network is active. This will prevent problems
such as shorting the network supply or
disrupting communications.
VLT 2800 Drop cable
An alternative to splicing two trunk lines in the
connector on the control card, is using a DeviceNet
connection box or a T-connector. For this kind of
installation a drop cable is available as an option.
Drop cable ordering number: 195N3113
10
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VLT 2800 / FCD 300 DeviceNet
NB!:
Please note, that terminal 46 has been removed
from the DeviceNet card, meaning that
parameter 341-342 are not having any function.
MG.90.B2.02 - VLT is a registered Danfoss trade mark