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12
Internal settings
The following settings are configurations which might be required to get configured one
single time when setting up / configuring the system. They are configured through jumpers
which are located on the PCB of the ARU20x housing, requiring the top cover from being
removed before making any adjustment.
ATTENTION
These settings are only allowed to be made by qualified technicians and
the system must be fully disconnected before any of these adjustments are
being made.
Bus termination jumper:
When multiple ARU20x’s are used in one system and are daisy chained through the RS485
bus, the last ARU in the chain needs to have the bus termination jumper placed to terminate
it on the correct characteristic impedance, avoiding reflections and guaranteeing a reliable
signal transmission.
The bus termination jumper (JP1) is default configured as terminated (meaning only one
device connected to the ARU20x’s RS485 databus).
Terminated (default)
Not terminated
Ground lift jumper:
The input ground contacts are all connected together, and the output ground contacts are
all connected together. The in & output grounds can be connected / disconnected with each
other through a jumper (JP3). In default configuration, the jumper is configured as ‘connected’,
meaning the in & output ground contacts are connected.
Grounds connected (default)
Grounds not connected
Содержание ARU20 Series
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