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The CAMAC Crate System Architecture

The centre piece of the architecture is the system crate (executive crate). It contains the following:

• Executive crate controller
• Branch couplers
• Computer modules (e.g. interface to VAX, Starburst)

A branch highway extents from each branch coupler. Each highway is connected to a number of crates (1 to 7).

Each crate contains the following:

• Crate controller
• Data-collecting modules (such as analog-to-digital converters).

Note that not every branch and every crate that is connected need be used. Each branch and each crate has an on-line/off-line switch. When a branch or a crate is off-line, then it cannot be used.

verbatim

CAMAC commands:

B -- branch

C -- crate

N -- niche

A -- address

F -- function

Figure 2 --- Block diagram of branch system architecture