Emerson A6220 Discrete Quantity Module

A6220 Digital quantity is a kind of physical quantity, their change in time is discontinuous, always occurs in a series of “discrete” moments, this kind of physical quantity is called digital quantity, that is, discrete quantity, refers to is dispersed, there is no intermediate value of the quantity.

The concept of the A6220 analog quantity corresponds to a digital quantity, but can be converted to a digital quantity after quantization. The analog quantity is a continuous physical quantity in time and quantity, and the signal it represents is an analog signal. Any value of the analog quantity in the continuous change process is a specific and meaningful physical quantity, such as temperature, voltage, current, etc. Continuous voltage, current and other semaphore, after sampling and quantization is a digital quantity.

A6220 switching quantity refers to the acquisition and output of non-continuous signals, including remote acquisition and control output. It has two states of 1 and 0, which is the switching nature of the digital circuit, and the power refers to the circuit on and off or the contact on and off. “On” and “off” are the most basic and typical functions of electrical appliances. General switching device through the internal relay to achieve switching output.