Oil and gas industry: Used to monitor and control various critical processes such as oil field extraction, refineries, gas processing plants, etc., to ensure safety, reliability and efficiency. It can monitor and control various parameters in real time to ensure the stability and safety of the process. In addition, it can be used to monitor and control key components such as generators, transformers and switchgear to ensure the stable and reliable operation of the power system. At the same time, key parameters such as mechanical equipment, conveyor systems, temperature and pressure can be monitored and controlled to improve production efficiency and quality.
Transportation and traffic field: Used to monitor and control rail transit systems, aerospace equipment, automotive production lines and other key facilities to ensure the safety, reliability and accuracy of transportation systems.
Brand :TRICONEX
Type :4211
Native place: The United States
Quality assurance :365 days
Color: New/used
Mode of transportation: Express
Module PLC, DCS, ESD system card, the card is vibration monitoring system, steam turbine control system module, Advantages gas generator spare parts brands are :Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft, etc. Various imported industrial parts of the company's products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, paper making, printing, textile printing and dyeing, machinery, electronic manufacturing, automobile manufacturing, plastic machinery, electric power, water conservancy, water treatment/environmental protection, boiler heating, energy, transmission and distribution and other industries.
The price of the I/O part accounts for more than half of the PLC price, and different I/O modules, due to their different circuits and performance, directly affect the application range and price of PLC, should be reasonable choice according to the actual situation.
1. Select the input module
The function of the input module is to receive the input signal from the field, and convert the input high level signal to the low level signal inside the PLC. Types of input modules: DC 5V, 12V, 24V, 48V, 60V, AC 115V, 220V. According to different circuit forms, it is divided into two types: junction input type and separated input type.
Note when selecting the input module:
(1) The choice of voltage. Should be considered according to the distance between the field equipment and the module, generally 5V, 12V, 24V is a low voltage, the transmission distance should not be too far. If the 5V module * is not more than 10m, the device that is far away should choose a module with higher voltage.
(2) The number of points connected simultaneously. High-density input modules (32 points, 64 points) at the same time on the number of points depends on the input voltage and ambient temperature, in general, the number of points connected at the same time do not exceed 60% of the input points.
(3) Threshold level. In order to improve the reliability of the control system, the threshold level must be considered. The higher the threshold level, the stronger the anti-interference ability, the further the transmission distance.
2. Selection of output module
The function of the output module is to transfer the PLC output signal to the external load, and convert the low level signal inside the PLC to the external output signal. The output module is divided into relay output, transistor output and bidirectional thyristor output according to different output modes. In addition, the output voltage and output current are also different.
Note when selecting the output module:
(1) Selection of output mode. The price of relay output is cheap, the applicable voltage range is wide, and the on-voltage drop is small. However, it is the original contact element, and its action speed is slow and its life is short, so it is suitable for the load that is not frequently on and off. When the inductive load is driven, the on-off frequency shall not exceed 1Hz. For inductive loads with low power factor and frequent on-off, contactless switching components should be used, that is, transistor output (DC output) or bidirectional thyristor output (AC output).
(2) Output current. The output current of the output module must be greater than the rated value of the load current. There are many specifications of the output current of the module, which should be selected according to the actual load current.
(3) The number of points connected simultaneously. The cumulative current value of the output module simultaneously connected points must be less than the current value allowed through the common end. Usually the number of points connected at the same time should not exceed 60% of the output points.
