User manual - PL500-PL600-PL700 - 7
1.3 Precautions for safe use
Be sure to observe the following precautions to prevent operation failure,
malfunction, or adverse affects on the performance and functions of the
product. Not doing so may occasionally result in unexpected events. Do not
handle the Digital Controller in ways that exceed the ratings.
• The product is designed for indoor use only. Do not use or store the product
outdoors or in any of the following places.
- Places directly subject to heat radiated from heating equipment.
- Places subject to splashing liquid or oil atmosphere.
- Places subject to direct sunlight.
- Places subject to dust or corrosive gas (in particular, sulfide gas and
ammonia gas).
- Places subject to intense temperature change.
- Places subject to icing and condensation.
- Places subject to vibration and large shocks.
• Installing two or more controllers in close proximity might lead to increased
internal temperature and this might shorten the life cycle of electronic
components. It is strongly recommended to install cooling fans or other
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 inductive 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 5A (cl. 9.6.2).
• Wipe off any dirt from the Digital Controller with a soft dry cloth. Never
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