Pilz PSSnet GW1 MOD--CAN, Руководство по эксплуатации

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Safety
Operating Manual PSSnet GW1 MOD­EtherCAT
1002692­EN­03
15
3.1.1.6 Testing the EMC­compliance of an installation
You can use the list below to check that the installation of the Gateway is EMC­compliant.
Check Measures Done
Are there areas with a high
probability of interference?
(e.g. computers running,
process control areas, dis­
tribution cabinets, cable
casing, frequency convert­
ers, hand­held radios etc.).
EMC protection in these areas should be planned
with particular care.
Are areas where com­
puters are running or
areas such as process
control rooms sufficiently
shielded from electromag­
netic coupling?
If necessary shield the whole area.
Does the cable layout take
into account the principles
of EMC compliance?
Some important points: Lay cables close to earth,
keep clear of other electrical equipment, keep
cables in ducts separate from other parts of the
installation, keep cables as short as possible,
avoid multiple crossovers.
Is the supply voltage free
of interference?
Supplies with interference voltages should be fit­
ted with a mains filter.
EMC characteristics of in­
dividual units / all units
tested once installed?
Test EMC characteristics under operating condi­
tions, e.g. while hand­held radios are in use, or
HF frequency generators are close by. Test static
discharge with operating personnel, test mutual
interference between units under different operat­
ing conditions.
Earthed parts connected
correctly?
The connections between the units, racking bars,
earth conductors and shield bars are important.
Inactive metal parts should be connected over a
wide surface area and earthed at a central point;
with insulated metal: Remove insulation or use
special contact fixings; protect the connection
from corrosion; connect the cabinet doors to the
body of the cabinet using earthing straps.
Cable groups laid separ­
ately?
Separate cables into groups. Supply and signal
leads should be laid separately.
Are the shields connected
correctly?
Use shielded cables for analogue and data leads;
use metallic plugs; connect cable shields to shield
bar at point of entry to cabinet; connect cable
shields over a wide surface area and with low im­
pedance.
Equipotential bonding car­
ried out?
If the installation extends over a wide area: lay
equipotential bonding cable.
Are inductive loads
switched?
Sufficient fuse protection should be used with in­
ductive loads
24 VDC power supply? Power supplies must conform to EN
60742:9/1995, EN 60950­1:2006/A11:2009 or EN
50178: 10/97.