YOKOGAWA FA-M3V e-RT3 Plus, Руководство по оборудованию

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A3-43
IM 34M06C11-01E
Note
Adopt the following corrective actions if necessary when routing the cables.
- Make the wiring cable as short as possible. This minimizes noise emission from the
cable and noise receipt on the cable.
- Fit a ferrite core around signal cables susceptible to noise to reduce the effect of the
noise. Ferrite core should be fitted near the cable outlet of the panel enclosure.
- When routing cables that are susceptible to noise, isolate them from cables that are
noise sources.
Cables that
are noise
sources Cables
susceptible
to noise
Power-motive
lines
Power supply
lines
DC signal lines,
communication
lines
Analog signal
lines
FA030903.VSD
There are several ways to achieve isolation when routing the cables.
- Isolation by distance (Route cables at least 20cm away from power-motive cables
and at least 10cm away from other cable groups).
- Place a grounded metal plate between the cables.
- Route each cable group through a grounded metal conduit or a shielded tube.
- When inserting a filter on a cable, make sure that wiring before and after the filter is
sufficiently far apart. Otherwise, noise may transfer to other cable sections and
reduce the effectiveness of the filter.
Pay special attention to the following areas:
- Noise filter inserted in the power supply cable
- Ferrite core fitted around signal cables
- Noise reduction circuits (surge protector circuit, arrestor circuit, etc.) inserted into
signal cables
(5) Considerations for 24V DC Power Supply to YHLS Slave Units (TAH Series)
- Use a dedicated 24V DC power supply for the TAH series. Avoid sharing power with
other equipment.
- The power supply should incorporate an internal noise filter.
- A ferrite core should be fitted on the power cable.