Panasonic HD-PLC DA-PU100, Руководство администратора

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DA-PU100 Series Administrator's Manual
35
4.1.2.2 Noise in transmission line
Cause:
· Noise from other equipment on the transmission line (inverter, motor, and AC adaptor, etc.)
· Influence of external noise (broadcast wave, radio communication wave, etc.)
Corrective action example:
· Remove noise source from transmission line and keep it away.
· Attach a noise filter to the device that generates noise on the transmission line.
Item PLC comm. failure device Remedy
High-speed motors Electric tool
Hair dryer
Electric Cleaner
Fan
-Things that produce a lot of noise
(sparks) in the high frequency range,
such as cheap dryers, become noise
sources
- Avoid power outlets
near a PLC and use it at
a distance.
- Insert a filter-attached
power strip to use noise
generating equipment.
Lightings DC-driven halogen light
Touch light
Dimming light
Dimming chandelier
-Impedance changes (phase fluctuation)
-Generates impulsive noise synchronized
with AC
Power strip with Filter Anti-lightning surge power strip
Noise filtered power strip
-Equipment that attenuates the PLC
signal
Insert PLC directly into
wall outlet
Switching regulator Power charger (e.g. for mobile phones)
-Low impedance
-Impedance fluctuates (phase fluctuation)
Avoid power outlets near
a PLC and use it at a
distance