Omron SX-F, Инструкция по эксплуатации

Страница: 36 / 316

28
Cable connections
Section 3-2
Fig. 26 shows an example when there is no metal mounting plate used (e.g. if
IP54 variable speed drives are used). It is important to keep the “circuit”
closed, by using metal housing and cable glands.
Fig. 24 Screen connection of cables.
Pay special attention to the following points:
• If paint must be removed, steps must be taken to prevent subsequent cor-
rosion. Repaint after making connections!
• The fastening of the whole variable speed drive housing must be electri-
cally connected with the mounting plate over an area which is as large as
possible. For this purpose the removal of paint is necessary. An alternative
method is to connect the variable speed drive housing to the mounting
plate with as short a length of litz wire as possible.
• Try to avoid interruptions in the screening wherever possible.
• If the variable speed drive is mounted in a standard cabinet, the internal
wiring must comply with the EMC standard. Fig. 25 shows an example of a
VSD built into a cabinet.
PE
Screen connection
of signal cables
Motor cable shield
connection