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PACs combine programmable logic controller (PLC) ruggedness with PC functionality under an open, flexible software architecture.

D-tAcq's networked digitizer ACQ196CPCI captures nearly 100 simultaneous analog input channels in one slot & at the same time doubles as a PAC, controlling a variety of additional modules - analog output, digital IO, timing, and runs automation software including EPICS. Tailored to fit your application, every slot is a payload slot

The System Slot capability gives the controller the ability to use COTS expansion cards, for example cards we have integrated include:

• AO32CPCI - 32 channels AO, optional 64 channels DO, AWG capable.
• Third party high density 256 bit DIO card
• Third party timing card
• Third party comms cards. The card supports an embedded EPICS IOC -a controller providing access to each IO in the system as a network process variable, and supporting user-defined local sequences.
  
  The card includes a fully featured embedded Linux implementation, and there are a number of ways for users to leverage this, ranging from simple scripts to high performance customized C programs. All cards are supported by easy to use device drivers. D-TACQ welcomes enquiries about integrating additional COTS cards.
  
  In a typical application the ACQ196CPCI will be set to acquire AI data continuously to local memory at a fairly high rate - e.g. 100kHz/channel. While the capture is operating, the controller continuously monitors input data values and publishes them as averaged Process Variables at a lower update rate - 10Hz/channel typical. Concurrently, the output functions may be driven by stored data - AWG at high rate - up to 1MHz/channel, or updated dynamically at lower rates. Computation of dynamic values may be performed locally with low latency, or remotely, perhaps with more computation. Capture is terminated when a trip signal is received, capture then stops and full rate data is exported for post-mortem diagnosis, or if zero turn-around is required, capture can be immediately restarted and the data uploaded in the background while the capture continues.

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