Honeywell UCN 51304362-100 with Factory Sealed

Product Specifications

Brand/Manufacturer: Honeywell

Part Number: MU-PLAM02

Alternate Part Number: 51304362-100

Honeywell Background

More than 30 years have passed since Honeywell introduced the world's first DCS system, TDC2000, in 1975, and process automation systems have changed dramatically.

Review Honeywell company DCS change process, pay attention to Honeywell's new generation Experion PKS system, for us to understand the current DCS development trend, grasp the future development trend has a very positive sign.

TDC2000 system

Before Honeywell introduced the TDC2000 system in 1975, the process of industrial control was still in the era of automatic control of process instruments.

Electric instruments were used abroad, while pneumatic instruments were mainly used in China, and electric instruments were just tried at the beginning.

The production process has a relatively low requirement for automatic control, which is mainly to ensure production stability and a relatively safe operation.

It is impossible or difficult to realize complex control, let alone advanced or optimized control, with relatively low production efficiency, large energy consumption, and high product cost.

Although at this time there have been a variety of computer models, and many people tried to use the computer in process control, but because of the failure of the computer caused by the production loss and security problems, so can not really realize the computer in the production process control.

The important significance of TDC2000 is that the concept of distributed control is proposed and realized.

Centralized operation and management, to achieve more coordinated operation between each loop or equipment, to improve the stability and safety of production operation; Decentralized control to achieve risk dispersion and isolation, and easy to install and maintain.

More than 30 years of practice has proved that the concept of distributed control is a basic principle of computer process control.

This concept is not outdated today but will be a dominant line of control in the computer process industry for a long time to come.

According to the principle of distribution, the basic function distribution features of the whole TDC2000 are as follows: the control network adopts a single-layer redundant structure; the Operation station is responsible for operation and data storage; Different controllers implement different process controls, and so on.

This basic function distribution is still adopted by some control vendors' DCS.

TDC2000 produced many important achievements in the field of the control system at that time, such as now very common redundant controllers, DH-Data Hiway, human-machine interface, etc.

From the perspective of control function alone, TDC2000 mainly realizes the replacement of traditional instrument control with computer control, but it cannot realize advanced or optimized control.

Moreover, the control scale is still small, and it is only suitable for a set of production device control.

TDC3000 system

In 1982, Honeywell released the TDC3000 BASIC system, which added an LCN(Local Control Network) Network on the basis of TDC2000 to constitute the LCN+DH two-layer Control Network architecture.

And the operation and data storage management function will be moved to the LCN network, in the DH network only connected to the controller.

In 1986, Honeywell released the TDC3000 standard system, which added a UCN(Universal Control Network) Network to replace the DH Network.

The TDC3000 system we now commonly refer to is the system of LCN+UCN structure.

TDC3000 redivides functions and adds AM(Application Module) on LCN for advanced control.

Add the interface Module between PLNM (Plant Network Module) and VAX computer for optimization control; Separate the operation station and data storage management, adding HistoryModule HM(HistoryModule); The Universal Station US(Universal Station) introduced the famous PM series controller on UCN, and introduced the Safety system SM(Safety Manager) for the emergency Safety shutdown of the factory.

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