Quadrature Incremental Decoder Interface for VMEbus

The VME323 is an Intelligent Quadrature Incremental Decoder VMEbus Board which can be configured for interfacing quadrature incremental encoders with or without an index channel. In index mode up to sixteen encoders with two quadrature channels and an index channel can be connected, and in non-index mode up to twentyfour encoders with two quadrature channels can be connected. The VME323 operates on two encoder input channels and decodes a pair of out-of phase signals in order to increment or decrement a counter.
This VMEbus board has a 6U form and is also available as 3U VMEbus board.

> Executes local firmware from ROM or custom firmware downloaded by the host
> Mailbox with polling and/or host interrupt, local interrupt mechanism
> Each encoder input is assigned to a 32-bit counter
> Index signals can be configured for detection of rising, falling or any edge
> Index can be used to load the corresponding counter with a preset value
> Counter value has one LSB uncertainty during movement and is accurate at ease

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