Topology - Danfoss MCA 123 POWERLINK Operating Instructions Manual

How to Install

2.1.5 Topology

The POWERLINK module features a built-in POWERLINK
slave controller and a two port HUB. This module enables
2 2 the possibility for connecting several POWERLINK options
in a line topology. If more than eight frequency converters
are connected in line, it will require special attention
towards the timing in the network.
It is important in a POWERLINK system, that the
connection is done correctly. POWERLINK is based on HUB
Illustration 2.4 Line Topology
Take care that following design rules are followed
1. Do not connect any non POWERLINK device (for
example PC) to any free port as this will cause
malfunction of the complete POWERLINK
network.
2. In a line topology all frequency converters must
be powered, either by mains or by a 24 V DC
option cards, for the built-in POWERLINK slave
controller to work.
8
MCA 123 POWERLINK Operating Instructions
technology, which means that connecting a none
POWERLINK device (for example, personal computer) leads
to malfunction of the system.
NOTE
Do not connect any non-POWERLINK device to any free
port as this causes malfunction of the complete
POWERLINK network.
3.
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MG92C102 - VLT is a registered Danfoss trademark
To achieve interference-free operation of the
Ethernet, observe the following EMC precautions.
The correct handling of the motor cable shield is
vital for the overall performance of the system. If
the rules are not followed it will lead to loss of
the control and malfunction of the system. The
Ethernet communication cable must be kept
away from motor and brake resistor cables to
avoid coupling of high frequency noise between
the cables. Normally, a minimum distance of 200
mm (8 inches) is sufficient, but maintaining the
greatest possible distance between the cables is