The SPX-7500 utilizes an RS-485 connection to provide a data link between the Central
and Remote RFX units. This RS-485 connection provides a data connection in the same
manner as other suprex products that use IP Newtwork, RF, or Fiber-Optic connections.!
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Note: The Gateway RS-485 data connection is entirely separate from the expansion
module RS-485 data connection. They are entirely different circuits.
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