What are the wiring methods for Festo FESTO solenoid valves in Germany

The wiring methods of the German Festo FESTO solenoid valve mainly include lead wire type and junction box type. According to the type of coil, the wiring method can be divided into single coil switch control type, single coil self holding type, and double coil self holding type. In addition, there are direct, normally closed, and normally open wiring methods.

As an important component in automatic control systems, the correct wiring of the German Festo FESTO solenoid valve directly affects the normal operation of the system. Below, we will provide a detailed introduction to several common wiring methods for solenoid valves.

1、 German Festo FESTO solenoid valves classified by wiring type

1. Lead wire connection

Lead wire connection is commonly used for waterproof and explosion-proof (explosion-proof) solenoid valves. The advantage of this wiring method is that the leads can be directly connected to the control system, reducing intermediate links. However, if the distance from the control system is far, additional wiring may be required, which may increase installation costs.

2. Box type wiring

Box type wiring is currently a widely used wiring method. It adopts DIN connectors, making the connection between the control system and the solenoid valve more convenient and reliable. No matter how far away the control system is, it will not be affected. In addition, there are no broken lines in the middle, reducing the number of fault points.

2、 German Festo FESTO solenoid valves classified by coil type

1. German Festo FESTO solenoid valve single coil switch control type wiring

This wiring method is common, whether it is lead wire or junction box, it is three wires. For direct current control, it is necessary to connect the positive pole, negative pole, and grounding wire; For AC control, it is necessary to connect the neutral wire, live wire, and grounding wire. It is worth noting that this wiring method does not distinguish between positive and negative poles or neutral wires.

2. Single coil self holding control type wiring

This wiring method is used in DC control systems. It has three wires, namely A, B, and C, where B is the common terminal. By using different wiring combinations, the opening or closing state of the solenoid valve can be achieved and maintained after power failure. This wiring method is commonly used in pulse control systems that operate for long periods of time and have insufficient electrical energy.

3. Dual coil self holding control type wiring

The control principle of this wiring method is the same as that of the single coil self holding type, but it uses switch independent coil control. It is equivalent to two sets of single coil switch controlled wiring, with each coil controlling one state. After a power outage, the valve will remain in its current state. This wiring method is commonly used for pulse control in the field of high-temperature and high-pressure solenoid valves.

In addition, there are direct, normally closed, and normally open wiring methods, which are mainly selected based on the working characteristics of the solenoid valve. In practical applications, the appropriate wiring method should be selected based on specific requirements and the characteristics of the solenoid valve.

Detailed explanation of the wiring method for the Festo FESTO solenoid valve controller in Germany

The wiring of the German Festo FESTO solenoid valve controller usually involves the connection of three key parts: power supply, output, and input.

1. Connect the positive pole of the 24V power supply provided by the switch power supply to the control power terminal, and connect the negative pole to the ground wire EG terminal. Meanwhile, ensure that the PE protective grounding terminal is securely connected to the ground wire.

2. Output wiring

Connect the solenoid valve or other electrical load directly to the DC+and Y output terminals to ensure normal operation.

3. Input wiring

Connect the switch signal directly to the X input of the input terminal and the ground wire EG terminal to achieve control function.

For sensors with power supply, the power terminal should be connected to the+E terminal or+24V terminal, the ground wire should be connected to the EG terminal, and the output terminal should be connected to the X input terminal.

In addition, the symbol for solenoid valves plays an important role in the design of pneumatic systems. It is a schematic diagram of the function of solenoid valves, commonly used in pneumatic system design and product identification, to help designers and users better understand the function of solenoid valves. In the design process, the pneumatic diagram is used to represent various solenoid valves with corresponding pneumatic symbols on the drawing, which is the application of solenoid valve symbols.

The attached figure shows different types of solenoid valves and their corresponding graphic symbols. From left to right, they are:

Direct acting solenoid valve: including three types: two position two-way, two position three-way normally on, and two position three-way normally off.

Pilot operated solenoid valve: also includes two position two-way, two position three-way normally on, and two position three-way normally off solenoid valves.

Two position five way single electric control and two position five way dual electric control solenoid valves: These two types of solenoid valves play an important role in pneumatic systems.

Three position five way sealing, three position five way releasing, and three position five way medium pressure solenoid valves: These types of solenoid valves have specific control functions.

In addition, the attached figure provides a detailed explanation of the symbols for solenoid valves, helping readers better understand and apply these symbols.

Several "refers to the number of working states of the German Festo FESTO solenoid valve. For example, in pneumatic systems, a square represents the valve body, and the number of arrows or T-lines inside it is the basis for" several ". The number of points on a square that intersect with the arrow line or T-line is referred to as the "number of connections". Through these explanations, we can better understand the graphical symbols of pneumatic solenoid valves.

4. The interpretation of magnetic valve graphic symbols is as follows:

The box represents the working position of the valve in the graph, and the number of boxes represents "how many positions".

The arrow is located within the box, indicating that the oil circuit is in a connected state, but it should be noted that the direction of the arrow does not always indicate the actual flow direction of the fluid.

The number of interfaces connected outside the box represents' how many connections'.

In graphics, the letter 'p' usually indicates the inlet/outlet port where the valve is connected to the system's oil or air supply circuit; And t (sometimes used as o) represents the return oil/air port that connects the valve to the system's return oil/air circuit; a. The letters' b 'are used to indicate the oil/air ports that connect the valve to the actuator. In addition, l is sometimes used to represent a leaking oil port on a graph.

The German Festo FESTO solenoid valve usually has two or more working positions, one of which is called the normal position, that is, the position it is in when the valve core is not subjected to operating force. In graphical symbols, the normal position of a three position valve is represented as the neutral position, while a two position valve that uses spring reset is represented as the normal position based on the passage state within the box near the spring. When drawing a system diagram, it should be ensured that the oil/air circuit is connected to the normal phase of the directional valve.