10 Wiring the systemThis chapter covers:10.1 Wiring the X-BUS interface 7510.2 Wiring of branch expander 8310.3 Wiring the system ground 8410.4 Wiring the relay output 8410.5 Wiring the zone inputs 8510.6 Wiring an external SAB bell 8810.7 Wiring an internal sounder 8910.8 Wiring Glassbreak 8910.9 Installing plug-in modules 9010.1 Wiring the X-BUS interfaceThe X-BUS interface provides for the connection of expanders to the controller. The X-BUS can be wired ina number of different configurations depending on the installation requirements. The X-BUS interface baudrate is 307kb.NOTICE: The X-BUS is an RS-485 bus with a baud rate of 307kb. The full performance is onlysupported in loop (see Loop configuration on the next page) and spur (see Spur configuration onpage 77) wiring configuration (best signal quality due to daisy chain of isolated sections with 1transmitter/1 receiver and balanced terminating resistors on each end).The performance in star or multi-drop configuration wiring (see Star and multi-drop configuration onpage 78) is limited due to non-optimal conditions of the RS-485 bus specification (reduced signalquality due to multiple receivers/transmitters in parallel with unbalanced terminating resistors).NOTICE: It is strongly recommended to use loop (see Loop configuration on the next page) or spur(see Spur configuration on page 77) configuration.The table below shows the maximum distances between controller/expander or expander/expander for allcable types in loop and spur configuration.Cable Type DistanceCQR standard alarm cable 200 mUTP Category: 5 (solid core) 400 mBelden 9829 400 mIYSTY 2 x 2 x 0.6 (min) 400 mEach device has 4 terminals (1A, 1B, 2A, 2B) for connection to expanders via the X-BUS cable. Thecontroller initiates a detection procedure on power up to determine the number of expanders connected onthe system and the topology in which they are connected.© Vanderbilt 2018 75 A6V10276959-d11.2018
