ABB M2304, Руководство пользователя

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Use suitable personal protective clothing.
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Use only suitable tools and measuring devices.
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Check the type supply network (TN system, IT system, TT system)
to secure the following power supply conditions (classic connection
to ground, protective earthing, necessary additional measures,
etc.).
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6.2 General installation instructions
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Terminate all branches of the wiring system via a connected bus device (e.g., indoor
station, outdoor station, system device).
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Do not install the system controller directly next to the bell transformer and other
power supplies (to avoid interference).
•
Do not install the wires of the system bus together with 100-240 V wires.
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Do not use common cables for the connecting wires of the door openers and wires of
the system bus.
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Avoid bridges between different cable types.
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Use only two wires for the system bus in a four-core or multi-core cable.
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When looping, never install the incoming and outgoing bus inside the same cable.
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Never install the internal and external bus inside the same cable.