Lenord, Bauer GEL 8310, Руководство по эксплуатации, Страница: 125 / 226

7-2
7.2 EMC measures
M
OUNTING INSTRUCTIONS
8310/8610-8
➨
Only connectors with metal housings or a housing made of
metallized plastic should be used and the screen connected
directly to the strain relief of the connector with as large a
surface area as possible
If the connector does not have special strain relief clamp, it
is advised to provide adequate clamping between the two
halves of the housing. If necessary widen the cable with
shrink-sleeve before folding over the screen.
The same applies to the cables at the terminal strips for the
devices:
X180014J
➨
Signal and control lines should be laid separated from the power cables
➨
Should potential differences exist or occur between machine- and elec-
tronic-earth connections, measures should be taken so that no compensat-
ing currents can flow through the screen (e.g. potential equalisation line
with large cross-section or cable with double screen, where only one end of
each screen is to be connected at different ends)
➨
If inductive loads (relays, contactors) are connected to the logic outputs,
measures for spark suppression should be provided (recovering diode or
RC network parallel connected and close to the coil)
For the power supply of the Controllers without certification the use of the
mains transformer – offered as accessory, cf. appendix C – is strictly
recommended.
By use of a mains suppression filter – an accessory, too – you can improve the
EMC behaviour in an unfavourable environment.
To this configuration the following screening and earthing principle is appli-
cable (when using another source of current equivalent measures are to be
performed):
X035AH