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7-3
Section
Errors and Troubleshooting
120
7-3-1 Noise Interference
If the system is malfunctioning because of noise, refer to the following table to
help identify the source and take the necessary steps to correct the problem.
Source
Likely cause
Remedy
Noise is generated when
power is turned ON to a
device. Sources may include
high-capacity motors,
Momentary voltage drop in
the power supply caused by
inrush current to
high-capacity loads.
•
Increase the capacity of the power supply and/or pow-
er supply cables.
transformers, and capacitors.
Common mode noise caused
by momentary voltage drop.
•
Supply power through a 1:1 ungrounded insulating
transformer.
•
Do not share a ground with high-capacity loads.
Ground the V700 System independently to 100
Ω
or
less.
Noise is generated at
irregular intervals.
Noise superimposed on
power lines.
•
Supply power through a 1:1 ungrounded insulating
transformer or noise filter.
•
Do not share a ground with high-capacity loads.
Ground the V700 System independently to 100
Ω
or
less.
Ambient noise radiated in
room.
•
If the system is operating without synchronization be-
tween Antennas and there are Antennas less than 20
m apart, use synchronization to eliminate interference.
If a noise source such as one of the following is in the
vicinity, separate it from the Antenna by at least 1 m.
(See note 2.)
•
Computer, AC adapter for a computer, switching power
supply, Programmable Terminal, Proximity Switch
Improve Grounding
Reduce Noise on Power Line
Other
device
Controller
Other
device
Controller
Ground at a
resistance less
than 100
Ω
.
24 VDC
Line filter
Controller
24 VDC
Twist the wires and do not
run them parallel to power
or high-voltage lines.
Note
1. The environmental noise measurement function can be used to check for
the presence of ambient noise.
2. The recommended separation of 1 m between the Antenna and radiating
noise sources is an approximate value. Use the environmental noise mea-
surement function to check whether a greater separation is required for the
actual noise source.
AUDIN - 7 bis rue de Tinqueux - 51100 Reims - France - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : [email protected]