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ActiveX
Microsoft's toolkit for Web developers, using OLE and incorporating Sun's Java language. ActiveX helps in building software to integrate with Microsoft's Internet Explorer, or any ActiveX container such as programs written with Microsoft's Visual Studio.
Actuator
In a closed-loop control system, that part of the final control element that translates the control signal into action by the control device.
Analog Input Module
An I/O module that contains circuits that convert analog dc input signals to digital values that can be manipulated by the processor. By implication, these analog inputs are usually direct (i.e., a data table value directly reflects the analog signal value).
Analog Output Module
An I/O module that contains circuits that output an analog dc signal proportional to a digital value transferred to the module from the processor. By implication, these analog outputs are usually direct (i.e., a data table value directly controls the analog signal value).
ANSI (American National Standards Institute)
The American National Standards Institute (ANSI) has served in its capacity as administrator and coordinator of the United States private sector voluntary standardization system for more than 80 years. ANSI does not itself develop American National Standards (ANSs); rather it facilitates development by establishing consensus among qualified groups.
AS-I (Actuator-Sensor Interface)
A low-cost electromechanical connection system designed to operate over a two-2ire cable carrying data and power over a distance of up to 100m, or more if repeaters are used.
Automation
The condition of being automated; any system or method that uses self-operating equipment, electronic devices, etc. to replace human beings in doing routine or repetitive work actions.
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