Technical data

Description
8-7
8
Dual 9-, 12-, and 20-Slot Backplane
The system chassis contains a 20-slot (see Figure 8-2 on page 8-8),
12-slot (see Figure 8-3 on page 8-9), or dual 9-slot (see Figure 8-4 on
page 8-10) full 32-bit VMEbus backplane mounted between the
VMEmodule and transition module areas. The features of the
backplane include:
❏ Accommodation for up to 20, 12, or 18 (dual 9-slot system)
VMEmodules per system, depending on the composition of
the payload
❏ All signal and power line connections for VMEbus
connectors P1 and P2
❏ P2 connections for transition modules
❏ VMEbus termination resistor networks
❏ Autojumpering feature for daisy-chain lines
Depending on the backplane, the front side has from 9 to 20
connectors on the top row to receive connector P1 of the
VMEmodules and another set of 9 to 20 connectors on the bottom
row to receive VMEmodule expansion connector P2. The backplane
can accommodate from 9 to 20 double-high 6U VMEmodules
containing both P1 and P2 connectors. An autojumpering feature
eliminates the need for daisy-chain jumpering between connector
sockets.
The P2 connectors on the reverse side of the backplane
accommodate MVME700 series plug-in transition modules. There
are two transition module connectors, designated XP1 and XP2,
provided for the CPU VMEmodule slot. There is one transition
module P2 connector for each of the remaining VMEmodule slots.
Please note that while Row A and Row C signals are duplicated
between the VME P2 and the transition module P2 connectors, the
Row B signals are not.
The backplane contains pass-thru openings for each VMEmodule
slot that accomodate the VMEmodule/transition module optional
pair keying kit.