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Improper wiring of the product can damage it and lead to other hazards. Make sure that the
product has been correctly wired before turning the power on.
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Before wiring or removing/mounting the product, make sure to turn the power off. Failure to do so
might cause an electric shock.
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Do not touch electrically charged parts such as power terminals. Doing so might cause an electric
shock.
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Do not disassemble the product. Doing so might cause an electric shock or faulty operation.
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Use the product only within the operating ranges recommended in the specification (temperature,
humidity, voltage, shock, mounting direction, atmosphere, etc.). Failure to do so might cause a fire
or faulty operation.
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Firmly tighten the wires to the terminal. Failure to do so might cause a fire.
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Avoid installing the product in close proximity to high-power electrical devices and cables,
inductive loads, and switching devices. Proximity of such objects may cause an uncontrolled
interference, resulting in an instable operation of the product.
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Proper arrangement of the power and signal cabling affects the operation of the entire control
system. Avoid laying the power and signal wiring in parallel cable trays. It can cause
interferences in monitored and control signals.
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It is recommended to power controllers/modules with AC/DC power suppliers. They provide
better and more stable insulation for devices compared to AC/AC transformer systems, which
transmit disturbances and transient phenomena like surges and bursts to devices. They also
isolate products from inductive phenomena from other transformers and loads.
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Power supply systems for the product should be protected by external devices limiting
overvoltage and effects of lightning discharges.
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Avoid powering the product and its controlled/monitored devices, especially high power and
inductive loads, from a single power source. Powering devices from a single power source causes a risk of introducing disturbances from the loads to the control devices.
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If an AC/AC transformer is used to supply control devices, it is strongly recommended to
use a maximum 100 VA Class 2 transformer to avoid unwanted inductive effects, which
are dangerous for devices.
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Long monitoring and control lines may cause loops in connection with the shared power supply,
causing disturbances in the operation of devices, including external communication. It is
recommended to use galvanic separators.
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To protect signal and communication lines against external electromagnetic
interferences, use properly grounded shielded cables and ferrite beads.
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Switching the digital output relays of large (exceeding specification) inductive loads can cause
interference pulses to the electronics installed inside the product. Therefore, it is recommended to use external relays/contactors, etc. to switch such loads. The use of controllers with triac outputs
also limits similar overvoltage phenomena.
