IDS XSeries 8 Zone Smart Bus Expander Module (860-06-700)XSeries 8 Zone key bus expander module with power monitoring Expand the X64 from zones 17 to 64 powered off IDS monitored PSU 8 Zone bus expansion module (max 6 per system) 8 Wired, end of line supervised zone inputs 2 Onboard programmable outputs Optional double end of line zone supervision Monitoring of power supply (AC fail, battery and fuse)