CS875-575-375-275-175 Installers Manual with CS5500 keypadA.4.9
4.3.2 Wiring several keypads together
The total cable length of wiring is restricted to 800 m. The chart below shows the wire gauge that should be used.
These numbers are for one keypad at the end of the wire. When connecting more than one keypad to the end of the
wire, a higher gauge wire is required.
4.3.2.1 Multidrop network
In a multidrop network, keypads are chained together. Each keypad is connected in parallel to the one before it.
4.3.2.2 Star network
In a star network, each keypad is wired back separately to the control unit terminals.
Table 4-1: Keypad bus length
Length Connected to CSx75
Length in Metres Wire mm²
110 0.50
200 0.75
333 1.00
500 1.50
800 2.50
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