It is a VME bus expander slave board can be used in combination with the Advme 1524 board (master board) to expand the number of VME bus slots.
It bridges the read/write cycle and interrupt acknowledge cycle of the VME bus on the master side to the VME bus on the slave side.
There is a bus arbiter function and a bus master function, so there is no need for a CPU board or similar component on the slave side.
It supports bus cycles for 16-bit data buses and 24-bit address buses, and is ideal when there is the need to expand the number of slots in a system that uses a large number of DI, DO, AI, AO and other I/O boards.
It can be used to expand the number of VME bus slots.
Daisy-chain connections can be created and this allows I/O boards to be distributed to multiple VME racks.
Daisy-chain connections allow overall cable length to be extended to 30m, and up to 16 slave boards can be connected to one master board.
Inserting an I/O board with an interrupter function into the slot on the slave side enables the execution of an interrupt process with the CPU board on the master side.
A setting can be specified so that only interrupt requests of a certain level are sent to the master board.