User manual - ATR121 - 9
air-conditioning devices inside the control cabinet.
• Always check the terminal names and polarity and be sure
to wire properly. Do not wire the terminals that are not
used.
• To avoid noise, keep the controller wiring away from
power cables that carry high voltages or large currents.
Also, do not wire power lines together with or parallel
to Digital Controller wiring. Using shielded cables and
using separate conduits or ducts is recommended. Attach
a surge suppressor or noise filter to peripheral devices
that generate noise (in particular motors, transformers,
solenoids, magnetic coils or other equipment that have
an inductance component). When a noise filter is used at
the power supply, first check the voltage or current, and
attach the noise filter as close as possible to the Digital
Controller. Allow as much space as possible between the
Digital Controller and devices that generate powerful high
frequencies (high-frequency welders, high-frequency
sewing machines, etc.) or surge.
• A switch or circuit breaker must be provided close to
device. The switch or circuit breaker must be within
easy reach of the operator, and must be marked as a
disconnecting means for the controller.
• The device must be protected by a fuse 1A.
• Wipe off any dirt from the Digital Controller with a soft dry
cloth. Never use thinners, benzine, alcohol, or any cleaners
that contain these or other organic solvents. Deformation
or discoloration may occur.
• The number of non-volatile memory write operations
is limited. Therefore, use EEprom write mode when
frequently overwriting data.
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