Xbee with

I want to wireless connect to a bunch (up to 21 units) of 9 Degrees of Freedom - Razor IMU - AHRS compatible(sku: SEN-09623). There is no manual on the site for downloading on how this can be done. Would like to know the actual wiring circuit of how to interface it to Xbee. What components are required ?

Also do I need 1 separate Xbee for each Razor IMU(so 21 Xbees as receivers + 21 Xbees on IMUs), or can I use a single Xbee as receiver for the PC connecting to the 21 units of Razor IMUs (total 22 Xbees)?

Fun Wey