AAS 12

Analog Acquisition System, A/D 12 Bit

The board AAS 12 is a storage type A/D Converter structure, in format standard Single Eurocard 100x160 mm. It works directly with Abaco® Industrial BUS so it can be controlled through one of the several CPU or GPC® cards designed to work on this BUS.

AAS 12 can be considered in every respect a Digital Oscilloscope Storage type with a buffer capable to keep 64 K conversions and a vertical resolution of 12 bit. Its programmability of functions such speed, number of conversions and trigger source make it a sophisticated research instrument to freeze even very fast analog events .

Both reading and programming are performed through BUS. The AAS 12 board can capture very fast events, even using very comfortable but very slow languages, like BASIC interpreters, without any need to write specific machine language procedures.

In addition, the board is provided with it own local memory capable to store the conversions results, without subtracting memory to the CPU memory or diverting it from its activities.

The board is provided with a trigger circuitery that allows to syncronize the conversion with external signals or with internal signals generated by the board itself .

It is also remarkable the possibility to syncronize several AAS 12, one of which becomes the master unit while the other ones become the slave units.

• Interface to Abaco® Industrial BUS
• 1 A/D converter signal with resolution 12 Bit; 3 µs conversion time
• Input signal range selectable in the range: +10/-10; 0/+10V; 0/+5V or 4-20 mA
• Programmable input Amplifier with selectable gain: x1; x100; x200; x500
• software programmable sampling time by steps of 250 ns, from a minimum of 5 µs to a maximum of 16,384 ms. This means that running at the higest speed it is possible to store 320 ms of an event at a resolution of 5 µs, or more than 17 minutes at the lowest speed possible.
• The number of conversion is programmable and ranges from one to a maximum of 65536 (128 K of on board RAM)
• Software selection amongst internal trigger interno, external trigger or the same input signal as trigger
• Can work in Master/Slave lode when more boards are installed
• Sample/Hold with 1,5 µs sample time
• Possibility of interrupt management through BUS
• I/O mapping through Dip Switch in normal or extended mode
• 8 consecutive byte taken for addressing
• Unique supply voltage: 5 V; 900 mA

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