IBM 1712
The IBM 1712 Multiplexer and Terminal Unit was part of the IBM 1710 process control computer. The Terminal Unit provided the physical connections between factory wiring and the computer. The 1712 could support up to 300 separate wire pairs. Signal types supported included analog input, analog output, contact sense, contact operate, process branch indicators and process interrupts. Special terminal blocks supported thermocouple inputs. The Multiplexer would select which signal was connected to the IBM 1711 Data Converter. {{DEFAULTSORT:Ibm 1712 1712 In the Swedish calendar it began as a leap year starting on Monday and remained so until Thursday, February 29. By adding a second leap day (Friday, February 30) Sweden reverted to the Julian calendar and the rest of the year (from Saturday ...

IBM 1710
The IBM 1710 was a process control system that IBM introduced in March 1961. It used either a 1620 I or a 1620 II Computer and specialized I/O devices (e.g., IBM 1711 analog-to-digital converter and digital-to-analog converter, IBM 1712 discrete I/O and analog multiplexer, factory floor operator control panels). The IBM 1620 used in the 1710 system was modified in several ways, the most obvious was the addition of a very primitive hardware interrupt mechanism. The 1710 was used by paper mills, oil refineries and electric companies. See also * IBM 1720 *IBM 1800 References {{Reflist External links"Evolution of Small Real-Time IBM Computer Systems"(1.25 MB PDF file), from the IBM Journal of Research and Development. 1710 In the Swedish calendar it was a common year starting on Saturday, one day ahead of the Julian and ten days behind the Gregorian calendar. Events January–March * January 1 – In Prussia, Cölln is merged with Alt-Berlin by ... Comp ...
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Process Control
An industrial process control in continuous production processes is a discipline that uses industrial control systems to achieve a production level of consistency, economy and safety which could not be achieved purely by human manual control. It is implemented widely in industries such as automotive, mining, dredging, oil refining, pulp and paper manufacturing, chemical processing and power generating plants. There is a wide range of size, type and complexity, but it enables a small number of operators to manage complex processes to a high degree of consistency. The development of large industrial process control systems was instrumental in enabling the design of large high volume and complex processes, which could not be otherwise economically or safely operated. The applications can range from controlling the temperature and level of a single process vessel, to a complete chemical processing plant with several thousand control loops. History Early process control breakthr ...
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Thermocouple
A thermocouple, also known as a "thermoelectrical thermometer", is an electrical device consisting of two dissimilar electrical conductors forming an electrical junction. A thermocouple produces a temperature-dependent voltage as a result of the Seebeck effect, and this voltage can be interpreted to measure temperature. Thermocouples are widely used as temperature sensors. Commercial thermocouples are inexpensive, interchangeable, are supplied with standard connectors, and can measure a wide range of temperatures. In contrast to most other methods of temperature measurement, thermocouples are self powered and require no external form of excitation. The main limitation with thermocouples is accuracy; system errors of less than one degree Celsius (°C) can be difficult to achieve. Thermocouples are widely used in science and industry. Applications include temperature measurement for kilns, gas turbine exhaust, diesel engines, and other industrial processes. Thermocouples are al ...
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IBM 1711
The IBM 1711 Data Converter was part of the IBM 1710 process control computer. The 1711 contained an analog-to-digital converter that accepted signals from the IBM 1712 Multiplexer and Terminal Unit that were between -50 millivolts and +50 millivolts and converted them into signed, four decimal digit numbers that were stored in the 1710s core memory. The 1711 featured a real-time clock that could place the current hour and minute into storage, again as a 4 digit number. On the 1711's control panel, there was a bank of seven decimal digit manual entry switches that could be read by the computer. The 1711 also contained address circuitry for the IBM 1712 Multiplexer. Optional 1711 features included contact sense, contact operate, analog output, interrupt, and process branch indicators. While all this and more would fit comfortably on a single IC today, the IBM 1711 occupied a three section rack cabinet. See also *IBM 1800 References {{DEFAULTSORT:Ibm 1711 1711 In the ...
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