Böhnke + Partner bp308 - Group of Two Lifts in Three Lines

7.8.4.3 Group of Two lifts in Three Lines
On the picture you can see the topology of a bus for the landing calls
of a group of two lifts in three lines. As the line structure cannot be
realised for more than two lines, gateways are used in order that
each single line forms a real line itself. The bus is terminated at each
end.
INFO
Pay attention to the terminations while commissioning the lift. In most
cases, a lift is first put in operation as a single unit and the connection
to the group is realised later on. In this case, the terminations are to
be adapted (refer to controls of a single lift).
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Fig. 45
Topology of a bus for the landing calls of a group of two lifts in three lines.