Three enclosure options which provide upgrade paths for GS140 PSU-based systems are available. These options allow for additional mass-storage devices, backplane expansion up to 14 usable slots, and additional I/O connectivity. The GS140 PSU Cabinet used for the MicroPDP-11/83 standard system (DH-183Q3) and system building block (183QE) is now available for customer system integration. Modifications, which were necessary to accommodate rack- mounting dual BA23's in the midsection, include the addition of vented side panels for cooling and the GS140 PSU-A I/O distribution panel for FCC compliance and additional I/O connectivity. The GS140 PSU-JA/JB cabinets do not include the dual BA23s. However, they do include one set of BA23 mounting brackets as well as a rackmount BA23 front bezel, power cord (-JA variant only), the H3490-A, and an installation guide (EK-H964J-IN). • Height: 106 cm (41.7 in) • Width: 65.6 cm (25.7 in) • Depth: 91.4 cm (36 in) GS140 PSU • Weight: 163 to 311 kg (358 to 6851b), depending an mass storage selected