Programmable controller with expandable I/O interface circuitry
US4504927A · kind A · utility
75Cited by
17References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1982 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Sep 8, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/1107
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A programmable controller has eight I/O buses which will support a corresponding number of I/O modules. The I/O capacity of the programmable controller may be increased by replacing four of the I/O modules with an I/O address module and three I/O interface modules that drive I/O expansion buses. Up to eight I/O racks, each containing three I/O modules and one adaptor circuit, can be connected to the I/O expansion buses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.