Specifications

Introducing The DXP
DXP Correspondence Manual
1.7
Identifying
The Mandatory
DXP Boards
The card cage of the main cabinet has grooves on the top and bottom
racks to ensure that each printed-wire-board only fits into the correct
slot. On the backplane are pinouts that match the pinouts on each
board. These connections provide the contact points for the bus
connectors that are edge-mounted on the printed-wire-boards. A
horizontal metal bar runs along the backplane to provide structural
support for the backplane; it also provides mechanical keying of the
boards to the backplane to prevent you from accidentally inserting a
board into the wrong slot. The front of the cabinet also has a printed
label that designates which printed-wire-board fits into which slot.
Keep in mind that some of the DXP’s boards are mandatory for
system operation and some of them are optional.
Interface Boards
The first slot in the cabinet, moving from left to right, is for the
Interface 1 board (DXINM). The interface 1 board buffers the signals
sent from the main cabinet to the expansion cabinet; it makes sure
there is no integrity loss in the digital signal between the two cabinets.
So, you’ll only need an interface board if you’re going to use an
expansion cabinet (for information on the expansion cabinet’s
interface board, see section 1.9, Introducing The Expansion Cabinet).
The slot for the interface 1 board is smaller than any of the other
card-cage slots. The interface board is the only half-sized board that
inserts directly into the backplane. Both interface boards, the one for
the main cabinet and the one for the expansion cabinet, are shipped
with the expansion cabinet. For more information on the interface
boards, see IMI66-086.
I- 6 Introducing The DXP