Modbus_RTU (RS485) fieldbus Remote Inputs/Outputs Modules system design based on GD32E231

Technology is developing at a rapid pace. Whether in life or in the office, we are exposed to a variety of electronic devices. When many electronic devices work together, they will also generate some signal sources. In order to better transmit and collect signals, industrial control products such as remote IO modules, signal transmitters, and signal acquisition modules have been developed. So, what is the use of remote IO module? What is its function?
In the past, when laying lines between ready-made and panel cabinets, people had to connect them one by one, which greatly increased the cost of cables and construction time. Moreover, if the distance was relatively long, they would also face problems such as voltage attenuation. The remote IO module effectively solves this problem. If your panel is 200 meters away from the site and you do not use remote IO, then each of your signal lines must be routed 200 meters away. Then installing the remote IO module on site can save you a lot of cables in terms of cost. money as well as reducing the complexity of construction. To put it simply, sometimes some IOs are set up in a centralized location of on-site equipment, far away from the central control, and then connected back to the central control room through optical fibers, in order to save cable procurement and construction. Sometimes, the logical "remote" is because the allowed number of "local IO" cannot meet the actual needs, and a "remote IO template" needs to be connected. The specific situation depends on the actual situation. In addition, the cabinet room is generally placed at the installation site. However, some control signals, such as emergency stop, bypass and other control signals, are implemented in the control room, so remote IO modules need to be used to send these signals to the control system in the cabinet room. Distributed remote IO modules are now used in many fields, and their role is huge. So, do you know about the characteristics of distributed remote IO modules?
1. Reduce the number of control panels.
Using distributed remote IO modules to monitor the metal temperature of boilers, turbines, generators and other equipment can reduce the number of control panels, reduce the area and space of the control room, make the control room neat and beautiful, and can Effectively improve the reliability and measurement accuracy of the viewpoint.
2. Reduce installation costs.
Distributed remote IO modules save more hardware equipment than DCS. Using distributed remote IO modules can reduce a large number of safety barriers, isolators, remote IO modules, field cables and terminal blocks, thus saving IO devices, as well as the cabinets and spaces in which they are installed, reducing installation costs.
3. Reliability  
The number of safety barriers, isolators, terminal cabinets, IO modules, field cables and terminal blocks of distributed remote IO modules is greatly reduced. On-site signals are transmitted digitally, which greatly improves the anti-interference ability of the system. These factors have improved the reliability of distributed remote IO modules!
4. Maintainability:
Due to the complete decentralization at the field level, safety barriers, isolators, I/O modules, field cables and terminal blocks are greatly reduced. Therefore, the distributed remote IO module greatly improves its maintenance performance.
5. Dispersion  
Compared with traditional DCS, distributed remote intelligent I/O embodies more complete decentralization. It uses independent power supply and CPU for each 20 channels of data acquisition and processing, so faults are also dispersed. Even if any one front end fails, it will not affect the normal operation of other front ends.
6. Environmental adaptability  
The distributed remote IO module has an ambient temperature of -20-70°C and a protection level of IP56, so it is suitable for places with harsh temperature environments such as the top of boilers.
This design is based on the design and development of the Modbus_RTU (RS485) bus Remote Inputs/Outputs Modules system of GD32E231.