3BP150.41 B&R
2005 backplane,15 slots,with backup battery
Estimated transportation size
Size:7.0″x 2.0″x 24.0“
(17.8 cm x 5.1 cm x 61.0 cm)
Weight:2 lbs 12.0 oz(1.2kg)
Warranty:One year
Contact information:+86-17735379951
Email:340565517 qq.com
A tree like topology system from top to bottom, where communication is the key.
It is a tree topology and parallel continuous link structure, with a large number of cables running parallel from relay stations to on-site instruments and meters.
Analog signal, A/D-D/A, mixed with microprocessor. It is composed of several computers and some intelligent instrument components, gradually replacing analog signals with digital signals.
One instrument is connected to the I/O line by line and connected to the local area network LAN by the control station.
DCS is a three-level structure consisting of control (engineer station), operation (operator station), and on-site instruments (on-site measurement and control station). The disadvantage is that the cost is high, the products of each company cannot be interchanged and interoperability, and the large DCS system is different from each other.
Used for large-scale continuous process control, such as centralized control of petrochemical and large power plant units
The structure difference between PLC system and DCS system is not significant, but only in terms of functional focus. DCS focuses on closed-loop control and data processing. PLC focuses on logic control and switch quantity control, and can also achieve analog quantity control.
The key to DCS or PLC systems is communication. It can also be said that the data highway is the backbone of the distributed control system DCS and PLC. Due to its task of providing a communication network between all components of the system, the design of the data highway itself determines the overall flexibility and security. The media for the data highway can be a twisted pair, coaxial cable, or fiber optic cable.
The characteristics of DCS are: (1) strong control function. It can achieve complex control laws, such as cascade, feedforward, decoupling, adaptive, optimal, and nonlinear control. Sequential control can also be achieved. (2) High system reliability. (3) The CRT operation station has a good human-machine interface. (4) The software and hardware adopt a modular building block structure. (5) The system is easy to develop. (6) Using configuration software, programming is simple and operation is convenient. (7) Has good cost-effectiveness.
