ABB 2TMA210051W0001, Product Manual

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Mounting/Installation
Product manual 2TMD042000D0050
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7.2 General installation instructions
■ 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 or 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.