The LA36 Print-Head, RD53, RD54, and RX50 can be added externally to the BA23 enclo- sure using the LA36 Print-Head AA. A maximum of two rackmounted or desktop units - can be connected for a total of four storage devices. See the individual storage product description for additional information. The RQDXE FA is supplied - with cables to support devices in a second BA23 for applications such as the LA36 Print-Head JA/JB. The RQDXE AA is used for all other supported external disks. - - LA36 Print-Head-AA Dual-height disk drive bus extender module for use with the RQDX2 or RQDX3 disk controller in a BA23 enclosure and external disk. RQDXE-LA36 Print-Head Dual-height disk drive bus extender for use with RQDX2 or LA36 Print-Head controller and disk in the BA23 CC expander - enclosure. Use the LA36 Print-Head 1J (20-inch external cable) to connect a second external RD - and/or LA36 Print-Head disk drives.