5. Attach the supplied DB9-to-screw-terminal adapters to the two COM ports.
Note: For consistency with legacy NEXUS 2 hardware, the Screw Terminals are labelled above in a different
way to Cylon BACnet devices (FBXi, CBXi and CBX controllers). The “–“ pin is labelled “A” and the “+” pin
is labelled “B”.
On Cylon BACnet devices The “–“ pin is labelled “B” and the “+” pin is labelled “A”.
6. Connect and configure devices using the RS485 ports.
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