Early Microprocessors in Industrial Microcomputers

Jon Elson elson at pico-systems.com
Wed Mar 9 10:49:57 CST 2016

On 03/09/2016 09:28 AM, william degnan wrote:
> Not a lot is said about early use of microprocessors in industrial
> microcomputers.  Everything you read about is so home computing oriented,
> but I believe actual sales would have been greater in the industrial space
> 1974-77.
> I compiled a quick thread on my site about the earliest use of
> microprocessors in industrial microcomputers on my web site with links to a
> related article from EDN Microprocessor Design Series Volume II and scans
> of Process Computer Systems product brochures.  PCS was a pioneer in
> industrial micro-computing.
> If anyone has info to share / correct please let me know and I will add to
> the thread.
> http://vintagecomputer.net/browse_thread.cfm?id=631
Allen-Bradley had a 16-bit mini they called the 7300 
Industrial Processor.  They sold a lot of them in their 7320 
(and 7340, 7360) CNC machine tool controls.  (I have one 
here.)  See :

The row of red LEDs at the bottom of the pic is the front 
panel of the 7300 CPU.  They had an industrial control bus 
that allowed you to connect a wide variety of interface 
boards, like encoder counters, DACs, digital inputs and 
outputs, etc.  It used battery-backed DRAM, and was made 
around 1978.


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