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xControl LCD Hardware Manual
July 7, 2017
Version 2.0.0.0
17
In the example below, an RS-485 power injector is used to boost the available power for the
devices in the chain. Pins 4 (power) and 5 (ground) of the cable would be used for the power
connection. Pins 1-3 would be used for the data connection. See
Preparing the EIA-485 cables
(on page 20) for more information.
EIA-485 cable length limitations
Due to its small gauge, the EIA-485 cable has a length limitation of 304.8 meters (1000 feet).
This is the maximum length that can be used between the NION and the last xControl LCD
device in the daisy chain. If a longer cable is used, it is likely to cause power drop and stop the
devices at the end of the daisy chain working.
Here is an example showing the NION positioned at the end of the daisy chain.
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