Controlled Products Systems Group SPX-7500 - Manual (Page 5)

RS-485 GATEWAY Data Connections
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.
Note: The Gateway RS-485 data connection is entirely separate from the expansion
module RS-485 data connection. They are entirely different circuits.
RS-485 Interface
SPX-7500
Central
RS-485 (+)
RS-485 (-)
RS-485 (+)
RS-485 (-)
RS-485 Interface
SPX-7500
Remote
RS-485 Interface
to connect
SPX-7500 remote
and central units