Compaq VAX 7000 Guía de instalación descargar pdf (Pagina 8)

A TF85 (for VAX systems) or RRD42 (for DEC systems) can be ﬁtted, as an optional load

device. They connect to the XMI via a KFMSA or KZMSA. Figure 1 shows some XMI

adapters, for a full list see Section 4, XMI Supported Options .

3.1.2 Packaging

Refer to Figure 2, Laser Platform System Cabinet Layout .

The Laser platform system cabinet is slightly wider and taller than a VAX6000 cabinet.

This means you cannot install one in an existing line of VAXes without moving them.

The top of the cabinet contains the LSB card cage and the power system. The LSB card

cage has a backplane, which is double sided, in the centre (sometimes called a centreplane).

4 modules plug in from the front and 5 from the back. The power system has up to 3 plug

in regulators at the front and an A/C input box and power distribution at the back.

Also in the top are the Operator Control Panel (OCP) and, behind that the Cabinet Control

Logic (CCL) module. The latter provides an interface for the OCP, console and power control

logic. The TF85 or RRD42, if present, resides next to the OCP.

In the centre on the cabinet is the Air Mover (or fan to you and me). This draws in air from

the top and bottom of the cabinet and expels it in the region of your trousers. This means

nothing should be placed on top of the cabinet.

The lower part of the cabinet can house up to 4 Plug-In Units or PIUs. A PIU is basically

a self-contained box which can have I/O, storage or batteries in it. Figure 2 shows XMI and

Disk PIUs, as an example, but several other combinations are possible. See Section 3.3,

Plug In Units (PIUs) for more information on PIUs.

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Compaq VAX 7000 Guía de instalación Pagina 8