Industrial control voltage is the voltage used in industrial automation control system, which includes the voltage required by various sensors, actuators, controllers and other devices. The choice of industrial control voltage is important for the stability, reliability and safety of the system.
First, the classification of industrial control voltage
Industrial control voltages are divided into two main categories: direct current (DC) and alternating current (AC) voltages.
1.Direct Current Voltage (DC)
DC voltage is a voltage in which the direction of the current does not change with time. In industrial control systems, DC voltage is mainly used to drive DC motors, relays, sensors and other devices. Common DC voltages are:
- 5V: Used for low-power devices such as microcontrollers and sensors.
- 12V: Used for medium power consumption devices such as relays, solenoids, etc.
- 24V: Used for high power consumption devices such as DC motors and servo motors.
- 48V: Used for large industrial equipment such as elevators and cranes.
2.Alternating Current (AC)
Alternating current (AC) voltage is the voltage at which the direction of the current varies periodically with time. In industrial control systems, AC voltage is mainly used to drive AC motors, transformers and other devices. Common AC voltages are:
- 110V: Mainly used for small industrial equipment, such as small motors, transformers, etc.
- 220V: widely used in household appliances and some industrial equipment.
- 380V: mainly used for large industrial equipment, such as large motors, transformers and so on.
- 660V: Used for high-voltage motors, high-voltage transformers and other equipment.
Second, the principle of industrial control voltage selection
1.Selection of voltage according to equipment requirements
Different equipment has different requirements for voltage, and the voltage should be selected according to the rated voltage of the equipment. For example, if the equipment requires 24V DC voltage, then the voltage of the control system should be selected 24V.
2.Consider the stability of the system
The stability of the system refers to the ability of the system to work normally in the case of external interference or internal failure. When selecting the voltage, the stability of the system should be considered to avoid too high or too low a voltage resulting in an unstable system.
3.Consider the reliability of the system
The reliability of the system refers to the ability of the system to fulfill the specified functions within the specified time and under the specified conditions. When selecting the voltage, the reliability of the system should be considered to avoid equipment damage or failure caused by too high or too low voltage.
4.Consider the safety of the system
The safety of the system refers to the guarantee of personal and property safety under normal use and failure of the system. When selecting the voltage, the safety of the system should be considered to avoid too high a voltage leading to electric shock accidents or equipment damage.
Third. Application of Industrial Control Voltage
Sensor
Sensors are important components in industrial control systems for detecting and measuring a variety of physical quantities, such as temperature, pressure, flow and so on. Sensors usually require DC voltage power supply, and common voltages are 5V, 12V, 24V and so on.
Actuator
Actuators are driving elements in industrial control systems, used to drive mechanical equipment, such as motors, valves, etc.. Actuators usually require higher voltages, such as 24V, 48V, 220V, etc.
Controller
Controller is a control element in industrial control system, which is used to receive sensor signals, process data and output control signals. Controllers usually require DC voltage power supply, common voltages are 5V, 12V, 24V, etc.
Communication equipment
Communication device is a data transmission element in industrial control system, which is used to realize data exchange between devices. Communication devices usually require DC voltage power supply, and the common voltages are 5V, 12V, etc.
Fourth. industrial control voltage safety measures
1.Grounding
Grounding is one of the most basic safety measures in industrial control systems. Through grounding, static electricity and leakage in the equipment can be directed to the ground to avoid electric shock accidents.
2.Overload protection
Overload protection is a measure to prevent equipment from being damaged by excessive voltage. By setting an overload protection device, when the voltage exceeds the rated voltage of the equipment, the power supply can be cut off automatically to protect the equipment.
3.Short circuit protection
Short-circuit protection is a measure to prevent equipment damage due to short-circuit. By setting the short-circuit protection device, when the equipment is short-circuited, the power supply can be cut off automatically to avoid equipment damage.
4.Leakage protection
Leakage protection is a measure to prevent the equipment from being damaged due to leakage of electricity or causing electric shock accidents. By setting the leakage protection device, when the equipment leakage occurs, it can automatically cut off the power supply to protect personal safety.
Fifth. the development trend of industrial control voltage
Low voltage
With the continuous development of electronic technology, industrial control voltage gradually to low-voltage development. Low-voltage can reduce energy consumption, improve system stability and safety.
Modularization
Modularization refers to the modularization of each function in the industrial control system to achieve independence and interchangeability between modules. Modularization can improve the flexibility and expandability of the system.
Intelligent
Intellectualization refers to the use of computer technology, communication technology, etc. to achieve automatic control and optimization of industrial control systems. Intellectualization can improve the efficiency and reliability of the system.
Greening
Greening refers to focusing on environmental protection and energy saving in the design and operation of industrial control systems. Greening can reduce the impact of industrial control systems on the environment and achieve sustainable development.