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    Keith • 05/12/2024 at 23:28 • 0 comments

    VSP80 VMEbus 80-channel I/O

    The VSP80 is an 80 channel multi-function parallel I/O board with a comprehensive selection of features. Typical applications are machine control, counting and timing and process monitoring.

    All I/O lines can be input or output and can be de-activated at reset. They are brought out on the front panel via two Arcom standard 50-way I/O connectors, providing users with access to Arcom's Signal-Conditioning Bus boards. Forty I/O lines are open- collector TTL lines with pull-ups and read-back inputs.

    They are bit-programmable as input and output and are set by writing to latches. Two 8536 counter timer and parallel I/O (CIO) devices provide a further forty I/O lines. Sixteen of these lines are buffered by 8-bit wide buffers whose direction is controlled by jumpers. The remaining 24 are individually set as input or output by changing jumpers, and are open- collector TTL lines with pull-ups, protected up to 30 volts.

    The power of the 8536s comes from their ability to do much more than simple parallel I/O. They can be programmed to relieve the processor of much of the time consuming polling in applications needing to monitor many signals, by providing facilities such as level, edge, and pattern detection with priority encoding. There are a total of 6 counter timers on board, each of which can be clocked at up to a maximum of 2MHz, making the board. ideal for high-speed I/O-intensive applications.

    The VSP80 has a VMEbus slave interface and optional STEbus interface and can be controlled from both. With the STEbus interface installed, communication between the buses can take place through two 16- bit wide data latches which can cause interrupts when written to.

    VMEbus Interface:

    AD0, A16, D16, D08, (E0), D08(INT), ROAK/RORA, I(1-7).

    STEbus Interface:

    Slave interface in I/O space with non-vectored interrupts.

    Power consumption:

    Typ 1.8A @ 5V

    Features:

    • 80 I/O lines
    • TTL-compatible inputs and outputs 24 channels with on-board protection to 30V
    • 6 counters/timers up to 2MHz each
    • Level, edge and pattern detection
    • Arcom standard 50-way I/O connectors
    • VMEbus interface
    • STEbus interface (optional)

    Ordering Information:

    VSP80        VMEbus 80 channel I/O
VSP80ST      VMEbus 80 channel I/O with STEbus interface