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Aprilaire 8825 Installation, Configuration And User Manual page 5

System controller

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Connect the enclosed Cat5 RS-485 serial communications pigtail cable between the System Controller
and the Distribution Panel. Plug the RJ45 connector into the RS-485 jack in the System Controller, and
connect the four individual wires as shown above into the terminals marked A+, A-, B+, B- on the
Distribution Panel.
*#
+ (
There are two methods to connect a computer to the System Controller: directly to a computer (with the
supplied crossover Ethernet cable); or using a local area network (with the supplied standard Ethernet
cable).
If there is no network available, then the System Controller is connected to a computer using the
enclosed crossover cable, which can be identified by the special label. Plug one end of the crossover
cable into the System Controller and the other end into the computer's network port.
If there is a network available, then use the standard cable, plugging one end into the System Controller
and the other into an available Ethernet network jack.

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