My application is as follows.

I have 70 modules each having RS232 and RS485 drivers, 16C63, DAC 1220,  AD7705
and 24LC08. The modules control the current fed to a electro plating rectifier i
n
7 banks of 10 each.  The settable current is from 1 Amp to 50 Amps. The non
linearity of the rectifier responce is taken care by calibration and the values
are stores in the SEEPROM.

These 70 modules spread over 100 meters are connected to a master controller
based on Z80 which in turn is connected to a PLC.

The PLC sends group commands to the Z80 system and the Z80 in turn sends and
receives data to and from the 70 modules.
It is working well in the noisy field environment.

Now this module has become a building block for various industrial applications.

Pailoor

Tim Hamel wrote:

> In a message dated 7/26/99 1:38:09 AM Pacific Daylight Time,
> chiptech@VSNL.COM writes:
>
> > I use AD 7705 ( 16 bit, sigma-delta, 2 channel differential input ) with a
> > PIC to
> >  communicate with a PC. It works great :-)
>
> Ahh...but mine is more meant for the field than near a PC. If I had chosen to
> a TLC0832 (from TI), then I coud have differential inputs and two channels
> also. But...I wanna keep things as simple as possible yet still be able to
> learn from it.
>
> Tim Hamel

Website : http://business.vsnl.com/chiptech


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