Omron K3HB - Noise Countermeasures; Preventing High-Frequency Waves and Surges; Inductive Noise Reduction Techniques

Digital Indicators K3HB-X/-V/-H/-S 31
21.Do not connect or remove connectors while the DeviceNet power
is being supplied. Doing so will cause product failure or malfunc-
tion.
22.Use cables with a heat resistance of 70ºC min.
■ Noise Countermeasures
1. Do not install the product near devices generating strong high-fre-
quency waves or surges, such as high-frequency welding and
sewing machines.
2. Mount a surge suppressor or noise filter to peripheral devices
generating noise, in particular, motors, transformers, solenoids,
and magnet coils.
3. In order to prevent inductive noise, wire the lines connected to the
terminal block separately from power lines carrying high voltages
or currents. Do not wire in parallel with or in the same cable as
power lines. Other measures for reducing noise include running
lines along separate ducts and using shield lines.
Example of Countermeasures for Inductive Noise on
Input Lines
4. If a noise filter is used for the power supply, check the voltage and
current, and install the noise filter as close to the product as pos-
sible.
5. Reception interference may occur if the product is used close to a
radio, television, or wireless.
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-
Digital
Indicator
Line filter
Surge
suppressor
Power supply input
Signal input
Power supply input
Digital
Indicator
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-
Signal
input
2 conductors
with shield
Digital
Indicator