REXROTH EFC3600 Series, Инструкция по эксплуатации

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tween mounting plate and control cabinet wall and to the mounting of a ground
bus to the mounting plate.
The best solution is to use a zinc-coated mounting plate. Compared to a lac-
quered plate, the connections in this case have a good long-time stability.
Connection Elements
For lacquered mounting plates, always use screw connections with tooth lock
washers and zinc-coated, tinned screws as connection elements. At the connec-
tion points, remove the lacquer so that there is safe electrical contact over a
large surface area. You achieve contact over a large surface area by means of
bare connection surfaces or several connection screws. For screw connections,
you can establish the contact to lacquered surfaces by using tooth lock washers.
Metal Surfaces
Always use connection elements (screws, nuts, plain washers) with good elec-
troconductive surface.
Bare zinc-coated or tinned metal surfaces have good electroconductive proper-
ties.
Anodized, yellow chromatized, black gunmetal finish or lacquered metal surfa-
ces have bad electroconductive properties.
Ground Wires and Shield Connections
For connecting ground wires and shield connections, it is not the cross section
but the size of contact surface that is important, as the high-frequency interfer-
ence currents mainly flow on the surface of the conductor.
6.3 Installing Signal Lines and Signal Cables
Line Routing
For measures to prevent interference, see the Project Planning Manuals of the
respective device. In addition, we recommend the following measures:
●
Route signal and control lines separately from the power cables with a mini-
mum distance of 100 mm or with a grounded separating sheet. The optimum
way is to route them in separate cable ducts. If possible, lead signal lines into
the control cabinet at one point only.
●
If signal lines are crossing power cables, route them in an angle of 90° in or-
der to avoid interference injection.
●
Ground spare cables, that are not used and have been connected, at least at
both ends so that they do not have any antenna effect.
●
Avoid unnecessary line lengths.
●
Run cables as close as possible to grounded metal surfaces (reference poten-
tial). The ideal solution are closed, grounded cable ducts or metal pipes
which, however, is only obligatory for high requirements (sensitive instrument
leads).
Bosch Rexroth AG
EMC Measures for Design and Installation
DOK-RCON01-REX*F*UL***-IN10-EN-P
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