The XBUS interface provides for the connection of Expanders to the SPC Controller and can be wired in several different configurations depending on the installation requirements. The XBUS interface is an RS485 bus with a baud rate of 307Kb (307000) 307,8,1,N  (No Flow).   FULL PERFORMANCE is only supported in LOOP and SPUR wiring configuration. … Continue reading Wiring the SPC XBUS interface