DIP switches
Connection to the AC indoor unit
NOTE
Mount the gateway in the desired place before wiring it.
1.
Use the supplied cable to connect the AC unit and the gateway:
IMPORTANT
This cable is 1.50 m (4.9 feet) long. Its modification in length may affect the correct operation of
the gateway.
a.
AC unit connection: Plug the end connector, the one on the longest unsheathed part of the cable, into
the socket CN75, CN65, CN12, or CN6 of the AC unit control board.
b.
Gateway connection: Plug the other end connector, the one on the shortest unsheathed part of the
cable, into the socket labeled as AC Unit.
Connection to the BACnet MS/TP or Modbus RTU bus
2.
Connect the BACnet MS/TP or Modbus RTU bus to the EIA-485 port of the gateway.
IMPORTANT
Observe polarity: B-, A+, and SG for signal ground.
IMPORTANT
• EIA-485 bus doesn't allow loop or star topologies.
• Maximum length for the EIA-485 bus is 1200 meters (3937 feet).
3.
Reconnect all systems to power.
5.3. DIP switches
The gateway includes three built-in DIP switches: SW1 (8 positions) at the bottom side; SW2 (8 positions) and
SW3 (3 positions) at the top side.
USER MANUAL Version 1.0.9
IN485FGL001I000 Gateway
Page 9 of 74
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