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3.1.4. Configuration Jumpers
There are three configuration jumpers on the CPU board. Jumper JP1 is intended for a change
of the board addressing and is not used at present. It need not be applied during a common
firmware upgrade. By default, jumper JP1 is disconnected. JP2 is intended for switching serial
port between CPU board and optional extension board. By default, jumper JP2 are connected.