ABB Welcome M2248 W Series, Product Manual

Page: 12 / 78

Mounting/Installation
Product manual 2TMD042300D0022 │ 12
7.2 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 or other power
supplies (to avoid interference).
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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.