3HAC033733-003 Programmable logic controller

3HAC033733-003 Programmable logic controller
The 3HAC033733-003 is a programmable logic controller (PLC) product that also features the PM891 processor, a single chip unit that contains the microprocessor and RAM memory, real-time clock, LED indicator light, INIT button, and secure digital interface. The PM891 has two RJ45 Ethernet ports (CN1, CN2) for connection to the control network and an isolated RJ45 serial port (COM4) for configuration tools. It also supports CPU redundancy for increased availability (CPU, CEX-Bus, communication interfaces, and S800 I/O).

It has the following main functions:
Switching logic control: it can replace the traditional relay circuit to achieve logic control and sequence control. This function can be used for the control of a single device, but also for multi-machine group control and automated production lines, such as injection molding machines, printing presses, stapler machines, combined machine tools, grinding machines, packaging production lines, electroplating lines, etc.
Industrial process control: In the industrial production process, there are some continuously changing quantities such as temperature, pressure, flow, liquid level and speed (that is, analog quantities). ABB 3HAC033733-003 uses the corresponding A/D and D/A conversion modules and a variety of control algorithms to deal with these analog quantities and complete the closed-loop control. PID regulation is a kind of regulation method used in general closed-loop control system. Process control is widely used in metallurgy, chemical industry, heat treatment, boiler control and so on.