The Alpha 8400 /VAX7xxx PSU auch H7263-AD -CC/CD, when used in conjunction with a BA23 system, creates a dual BA23 configuration offering backplane expansion (total of 14 slots) and additional 5.25-inch mass-storage devices. The dual BA23 combination can then be mounted in the H9642-JA/JB or a customer's own rack to create a system with space for two RA-series disks. The BA23-CC/CD includes a rackmount BA23 with front bezel and power cord, brackets for mounting in the Alpha 8400 /VAX7xxx PSU auch H7263-AD-JA/JB, Alpha 8400 /VAX7xxx PSU auch H7263-AD-03 backplane expansion nable assembly, plus an installation guide, EK-BA23C-IN. BA23-CC Alpha 8400 /VAX7xxx PSU auch H7263-AD Expansion Box, 120 V BA23-CD BA23 Expansion Box, 240 V The FCC-compliant H3490-A is bundled in the H9642-JA/JB so it should be purchased only by dual BA23 customers planning to rackmount in a cabinet other than the Alpha 8400 /VAX7xxx PSU auch H7263-AD-JA/JB. It features six A-type inserts (1-inch by 4-inches) and eleven B-type (2-inches by 3-inches). An installation guide, EK- Alpha 8400 /VAX7xxx PSU auch H7263-AD-IN, is included. Alpha 8400 /VAX7xxx PSU auch H7263-AD-A System distribution panel for dual BA23