What Is a Rotary Switch?
Rotary switches can be used to replace the traditional rotary pulse generators of the analog resistance potentiometer. These rotary switches are usually used in the human-machine interface of the front panel of the instrument and the audio-visual control board. The rotary switches use orthogonal optical encoders instead of analog potentiometers These purely digital devices, these rotary switches are similar in appearance to traditional or resistive potentiometers, but the internal structure of these rotary switches is completely digital and uses optical technology. Similar to traditional incremental encoder products, there are two orthogonal output signals (channel A and channel B), which can be directly connected to the encoder processing chip.
- The rotary switch is mainly installed in
- Rotary switch is a switch that controls the main contact to open and close by rotating the handle. There are also two structural forms of rotary switches, which are a unipolar unit structure and a multi-pole multi-position structure. Single-pole unit rotary switches are often used together with rotary potentiometers in applications, while multi-pole and multi-position rotary switches are mostly used for switching the working state circuit.
- In a certain range, the resistance value is changed, and then there is a contact switch. This is the switch of the old TV and radio. There are several gears for the fan. Several sets of lead wires are connected to the fan winding. To change the speed, the principle is similar to that of a potentiometer.
- Common band switches and shift switches of multimeters are rotary switches. There are two types of structures: one is the BBM (Break Before Make) contact type, which is characterized in that the moving contact first disconnects the front contact when the position is changed. After the contact is turned on again, there is a state where it is disconnected from both the front and back contacts: the other is the MBB (Make Before Break) contact type, which is characterized in that the moving contact has a state that it is in contact with both the front and back contacts during transposition Then disconnect the front contact and maintain contact with the rear contact. In the circuit design, the appropriate rotary switch should be selected according to the purpose of the circuit and the safety of the circuit.
- Rotary switch, because of its use, uses a sealed structure as a whole, has a certain waterproof effect, and can basically reach the IP65 waterproof level.
- At the same time, it is necessary to use a relatively hard and durable metal material. There is a difference between 2 or 3 gears. Such as AS series:
- Rotary switch, because of its use, uses a sealed structure as a whole, has a certain waterproof effect, and can basically reach the IP65 waterproof level.
- At the same time, it is necessary to use a relatively hard and durable metal material. There is a difference between 2 or 3 gears. Such as AS series ( RIVERSUN (HONG KONG) LTD ):
- Electrical Ratings 1A @ 24VDC; 1A @ 125VAC; 0.5A @ 250VAC
- Dielectric Strength 2000Vrms min contact to contact
- Insulation Resistance 100M min
- Operating Temperature -25ºC to 55ºC
- Sealing Degree IP65 standard
- Storage Temperature -25ºC to 55ºC
- Electrical Life 50,000 cycles typical
- Contact Resistance 50m initial