Omron K3HB Manual page 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.
Line filter
Digital
Indicator
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
2 conductors
with shield
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.
+
Digital
Indicator
-
Surge
suppressor
Signal
Digital
input Indicator
K3HB-X/-V/-H/-S
Digital Indicators
31