Serial Communications 6-7
March 2008
Wiring the System (cont.) Note: The XMT+ terminal on the barrier strip is the screw opposite
the red wire connection and the XMT– terminal on the barrier
strip is the screw opposite the green wire connection.
3. Reinstall the clear plastic shroud, close the cover to the electronics
console and reconnect the main power.
The RS485 serial interface is now ready for multi-point operation.
IMPORTANT: The installed version of the Model DF868 software
must be Version F2Z or higher to support RS485
operation. If necessary, contact the factory for
information about a software upgrade.