IS220PSVOH1B General Electric I/O PACK

IS220PSVOH1B

DISCONTINUED BY MANUFACTURER

GENERAL ELECTRIC

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Part No.: IS220PSVOH1B

Product name: module

Manufacturer: GE

Features: available

Inventory: 10 sets

Estimated delivery date: usually within 1-3 days

Shipping weight: 2 Kg

The first recognized PLC in the world was developed by Digital Equipment Company (DEC) in 1969. Limited to the component conditions and computer development level at that time, the early PLC was mainly composed of discrete components and small and medium-sized integrated circuits, which could complete simple logic control, timing and counting functions. Microprocessors appeared in the early 1970s. It was soon introduced into the programmable controller, which added the functions of calculation, data transmission and processing to the PLC, and completed the industrial control device with real computer characteristics. In order to facilitate the use of engineers and technicians familiar with relay and contactor systems, the programmable controller uses the ladder diagram similar to the relay circuit diagram as the main programming language, and names the computer storage elements involved in calculation and processing with relays. At this time, PLC is the product of the combination of microcomputer technology and conventional relay control concept.

In the middle and late 1970s, the programmable controller entered the stage of practical development. Computer technology has been fully introduced into the programmable controller, making its function leap. Higher operation speed, super small size, more reliable industrial anti-interference design, analog calculation, PID function and high cost performance have established its position in modern industry. In the early 1980s, programmable controllers have been widely used in advanced industrial countries. In this period, the development of programmable controllers is characterized by large-scale, high speed, high performance and product serialization. Another characteristic of this stage is that the number of countries producing programmable controllers in the world is increasing, and the output is increasing. This indicates that the programmable controller has entered a mature stage.