ABB WM1601 Mode D'emploi page 38

ABB-Welcome
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).
•
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.
•
Do not use common cables for the connecting wires of the door openers and wires
of the system bus.
•
Avoid bridges between different cable types.
•
Use only two wires for the system bus in a four-core or multi-core cable.
•
When looping, never install the incoming and outgoing bus inside the same cable.
•
Never install the internal and external bus inside the same cable.
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