ND-110 card crate

Crate sizes
The ND-110 Satellite has a 7-position card crate, the ND-110 Compact models has a 12-position card crate and the large cabinet can house up to 21 cards.

Card size
ND-110 circuit cards are 366.8 mm high and 280 mm deep.

Connectors
Every card has at least one 96 pin connector (the "C" connector) used for connection to the ND-100 Bus. In addition, a card may have one or two additional 64 pin connectors ("A" and "B"). Connectors A and B are defined for each individual card that uses them. They are used by I/O controllers for connections to external devices.

CPU card location
The ND-110 cpu card is normally located in position number 2 in the card crate of a ND-100 machine, or position number 3 for a ND-500 machine. This is the position used by the memory management card when the older ND-100 cpu card was used.

Note: computers upgraded with ND-110 CPU card may use the vacant slot, previously occupied by the CPU, for newer types of memory cards. The installation description manual contains the part- and ECO-numbers of the cards which will function in slot 1.

Placement rules
The first 1/0 card should be placed immediately to the right of the CPU card. There should never be empty positions between the CPU and the last 1/0 card. Expansion is from left to right.

Expansion
If there are not enough card positions, a new card crate may be added. Connection between the crates is done with the help of a bus extender card.