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This module is designed for 3500 series mechanical protection systems, supports EGD (Ethernet Global Data) communication, and can be integrated with EGD compatible controllers for real-time data exchange.

The 3500/91 also supports 10BASE-T and 100BASE-TX Ethernet standards, making it suitable for transmitting data monitored by the 3500 rack to PLC, DCS, or other control platforms.

Manufacturer Bently Nevada

Model 3500/91

Type EGD Communication Gateway Module

Protocol EGD 2.01, Ethernet UDP/IP

Ethernet standard IEEE 802.3, 10BASE-T/100BASE-TX

Power consumption 7.4 W typical

Working temperature -30 ° C to+65 ° C

Main module size 241.3 mm x 24.4 mm x 241.8 mm

Main module weight 0.79 kg

I/O module size 241.3 mm x 24.4 mm x 99.1 mm

I/O module weight 0.39 kg

Rack requirement: 1 full height front slot+1 full height rear slot

Application 3500 rack data communication, controller integration

Q1: What is the main function of 3500/91?

It is responsible for sending monitoring data and status from the 3500 rack to the external control system via Ethernet.

Q2: What protocols does 3500/91 support?

Public information shows support for EGD and Ethernet UDP/IP.

Q3: Do I need to use it in conjunction with other modules?

Yes, the information indicates that 3500/92M TDI is required for 3500/91 EGD to communicate with the monitoring module.

Definition of PLC

A programmable controller is a digital operational electronic system designed specifically for use in industrial environments. It uses programmable memory to store operational instructions such as logical operations, sequential control, timing, counting, and arithmetic operations inside, and controls various types of machinery or production processes through digital and analog inputs and outputs. Programmable controllers and their related peripheral devices should be designed according to the principles of easy integration with industrial control systems and easy expansion of their functions.

Programmable controllers are a member of the computer family designed and manufactured for industrial control applications. Early programmable controllers were called programmable logic controllers, abbreviated as PLCs, which were mainly used to replace relays for logic control. With the development of technology, the functions of this device have greatly exceeded the scope of logic control. Therefore, today this device is called a programmable controller, abbreviated as PC. However, to avoid confusion with the abbreviation of personal computer, the programmable controller is abbreviated as PLC.

Main features of PLC

(1) High reliability and strong anti-interference ability. Due to the use of large-scale integrated circuits and microprocessors, the number of system components is greatly reduced, and a series of isolation and anti-interference measures are taken in the hardware design and manufacturing process, making it adaptable to harsh working environments and highly reliable.

(2) Programming is simple and easy to use.

(3) Good universality and online modification capability. The PLC hardware adopts a modular structure, which can be flexibly configured to meet the requirements of different control objects, control scales, and control functions. And the ability to make online modifications can be achieved by modifying the software, so its functionality is easy to expand and has wide industrial applicability.

(4) Shorten the design, construction, and production cycle, and maintain capacity. At present, PLC products are developing towards serialization and standardization. Only the corresponding modules need to be selected for combination design according to the requirements of the control system. At the same time, software programming is used to replace the hard wiring of relay control, greatly reducing the wiring work. At the same time, PLC also has fault detection and display functions, which shortens the fault handling time.

(5) Small size, easy to achieve mechatronics integration.

2、 Functions of PLC

1. Logical control;

2. Timed control;

3. Counting control;

4. Step by step (sequential) control;

5. PID control;

6. Data control: PLC has data processing capability.;

7. Communication and networking;

8. Other: PLC also has many special functional modules that are suitable for various special control requirements, such as positioning control modules and CRT modules.

The above is the relevant information on the main functions and features of PLC, hoping to be helpful to you.

2. Classification of PLC

There are many types of PLC products, and their specifications and performance are also different. For PLCs, they are generally classified based on their different structural forms, functional differences, and the number of I/O points.

2.1. Classification by structural form

According to the structural form of PLC, it can be divided into two categories: integral and modular.

(1) Integrated PLC

Integrated PLC is a device that integrates power supply, CPU, I/O interfaces, and other components into a single chassis, as shown in the figure. It has the characteristics of compact structure, small volume, and low price. Small PLCs generally adopt this integral structure. The integrated PLC consists of basic units (also known as hosts) with different I/O points and expansion units. The basic units include CPUs, I/O interfaces, expansion ports connected to the I/O expansion units, and interfaces connected to programmers or EPROM writers; The expansion unit only has I/O and power supply, without CPU. The basic unit and the expansion unit are generally connected by flat cables. Integrated PLCs can generally be equipped with special functional units, such as analog units, position control units, etc., to expand their functions.

(2) Modular PLC

Modular PLC separates each component of the PLC into several separate modules, such as CPU module, I/O module, power module (some included in the CPU module), and various functional modules. A modular PLC consists of a frame or substrate and various modules, which are mounted on the sockets of the frame or substrate, as shown in the figure. The characteristics of this modular PLC are flexible configuration, the ability to select systems of different scales according to needs, and easy assembly, as well as ease of expansion and maintenance. Large and medium-sized PLCs generally adopt a modular structure.

There are also some PLCs that combine the characteristics of integral and modular, forming the so-called stacked PLC. The CPU, power supply, I/O interface, etc. of the stacked PLC are also independent modules, but they are connected by cables, and each module can be stacked layer by layer. In this way, not only can the system be flexibly configured, but it can also be made compact in size.

2.2. Classification by Function

According to the different functions of PLC, it can be divided into three categories: low-end, mid-range, and high-end.

(1) Low end PLC

Low end PLC has basic functions such as logic operation, timing, counting, shifting, self diagnosis, monitoring, etc. It can also have a small amount of analog input/output, arithmetic operation, data transmission and comparison, and communication functions. It is mainly used for single machine control systems with logic control, sequential control, or a small amount of analog control.

(2) Mid range PLC

In addition to the functions of low-end PLCs, mid-range PLCs also have strong functions such as analog input/output, arithmetic operations, data transmission and comparison, number system conversion, remote I/O, subroutines, and communication networking; Some can also add functions such as interrupt control and PID control, which are suitable for complex control systems.

(3) High end PLC

High end PLCs not only have the functions of mid-range PLCs, but also add signed arithmetic operations, matrix operations, bit logic operations, square root operations, and other special function operations, table making, and table transfer functions. High end PLCs have stronger communication networking capabilities and can be used for large-scale process control or to form distributed network control systems, thereby achieving factory automation.

2.3. Classification by I/O Points

According to the number of I/O points in a PLC, it can be divided into three categories: small, medium, and large.

(1) Small PLC

The I/O points of a small PLC are less than 256, with a single CPU and 8-bit or 16 bit processor, and a user memory capacity of 4KB or less. For example: Mitsubishi FX0S series.

(2) Medium sized PLC

The I/O points of a medium-sized PLC range from 256 to 2048, with dual CPUs and a user memory capacity of 2-8KB.

(3) Large PLC

The I/O points of a large PLC are greater than 2048, with multiple CPUs and 16 bit or 32-bit processors, and a user memory capacity of 8-16KB.

In the world, PLC products can be divided into three major genres by region: American products, European products, and Japanese products. The PLC technology in the United States and Europe was independently researched and developed in isolation from each other, so there are significant differences between PLC products in the United States and Europe. Japan's PLC technology was introduced from the United States and has a certain degree of inheritance from American PLC products, but Japan's main products are positioned on small PLCs. The United States and Europe are known for their large and medium-sized PLCs, while Japan is known for its small PLCs.

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