Eaton purchased the Westinghouse Distribution and Control Business Unit in 1994, acquiring the Numa-Logic PLC line as
part of the acquisition. Eaton sold the Numa-Logic PLCs (along with the Accutrol and Vectrol products) to
Advanced Technology Services. Many of the original engineers and
experts are still around (albeit at different companies).
If you have a question about old Numa-Logic NL-300 (card logic), PC-400
(bubble memory PLC),
NL-500 (2-wire remote I/O system), PC-700 (bit slice PLC), PC-900, PC1100
(Z-80 based PLC), PC1200 (80188 PLC),
PC1250, HPPC1500
(bit slice CPU w/integral PS), HPPC1700 (bit slice CPU with separate PS) or the Westnet II Data Highway (2 Mbbs token passing
network with guaranteed 0.1 s updates), perhaps we can help to direct you to the right source. Send a request to
dgloucks at gmail dot com.
Also, many of the old manuals, schematics and technical documents are available on paper but
have not been scanned and placed on the web just yet. As we are able, they will be converted to PDF documents and placed on
the web.
In the meantime, the documents that are available are contained below:
Numa Logic Communication Overview
Includes information on 6-byte protocol, Westnet II Data Highway RS-232 Asynchronous protocol, HPPC asynchronous advanced program loader (APL) protocol,
PC1100/1200 Local Area Network protocol, PC500 and PC2000 (Siemens) program loader port protocols
NCMZ-1799 (also good for NCMZ-799)
NCMZ-798
Numa-Logic NL-300 (NL 3xx) Hardwired Card Logic
Numa-Logic PC1100 / PC1200 / PC1250 Programmable Controllers
