A bistable relay is a device that is designed to control contacts. The difference from the conventional wired model is that the modification is suitable for parallel pushbuttons. You can control the device from different points.
A standard relay includes a block of contacts, a modulator and a set of transistors. Capacitors in the relay are used in a negative direction, and they differ in capacitance. If necessary, you can independently assemble a relay for a simple switch.
Device with coil
The user is able to make a bistable relay with his own hands based on a wire resistor. In this case, the modulator is selected most often for three capacitors, and the expander is used with low conductivity. The bistable relay with a coil is controlled by the controller.
It is also worth noting that the assembly should begin with a thyristor blank. The coil is selected for 24 V. To overcome impulse noise in the circuit, only variable converters are used. The negative resistance of the relay must be at least 30 ohms.
Make an impulsemodification
Pulse bistable relay can be assembled on a simple wire resistor. The modulator will need an expansion type, and its resistance should be at least 40 ohms. Experts say that capacitors should be soldered in sequential order. When assembling the relay, special attention should be paid to the contacts on the end plate. Quite often, the modulator is selected with a lining. In this case, the conductivity of the resistor should not fall below 4 microns. Thus, the rated voltage in the device will be maintained at 50 V.
Model with microcontroller
Microcontroller devices are very common. They are suitable for pushbutton switches. The devices are also actively used in switches. Experts recommend using only capacitive resistors for assembly. In total, the relay will require three capacitors. The nominal voltage is 24 V on average. With a conductivity of 2 microns, the resistor should provide an overload of 10 A.
The modulator for the relay is allowed to use the string type. As a rule, modifications are produced for three outputs. The bistable relay (microcontroller) is controlled by a switch. It is also worth noting that there are devices with wired stabilizers. The resistance index of the elements should not exceed 45 ohms.
5V relay
The 5 V relay is assembled with an open modulator. The stabilizer for modification will require a wired type, and its overload should be about 4 A. On average, the resistance of a relay of this typedoes not exceed 50 ohms. Quite often, contactor expanders are installed. Dipole capacitors are well suited for generating signals. When assembling, it is important to prepare four filters. Coil apply low conductivity. Experts say that the lining should be at the beginning of the chain. The nominal voltage of the relay should be about 30 V.
10 V devices
10V relays are made for make contactors. Resistors for devices are suitable for an adjustable type with an overload of 2 A. If we talk about simple modifications, then the coil can be safely used with a lining. It should also be noted that only two capacitors are required to assemble the relay.
The conductivity of the elements should be at least 5 microns. If the rated voltage rises a lot, it is recommended to check the resistance. The extensions of the modifications are of the wave type. The negative resistance of the elements reaches a maximum of 55 ohms. In some cases, phase resistors are used. They have a low overload rating, but they do a good job of handling transients.
Modifications for 12 V
Bistable relay (12 volt, automotive) suitable for wire type contactors. It is often used in lighting control systems. Coils for modifications are suitable for different frequencies and diameters. If you trust the experts, then the resistors are allowed to select an operating type with an open lining. In this case, modulators are used only on the thyristor, and the conductivity of the element will be about 3 microns.
Transceiversunder the relay are selected negative direction. The rated voltage in devices can be greatly reduced. This happens due to an increase in the load on the capacitors. To increase the voltage parameter, tetrodes are used, which operate from converters. Filters under them are installed with a conductivity of 10 microns.
Devices for detectors
The bistable relay intended for detectors is often found on the market. Devices are controlled by the controller. Models for detectors can be made independently. For this purpose, only one resistor is prepared. The conductivity of the element must be at least 12 microns at an overload of 2 A. The operating frequency of this type of relay is approximately 20 Hz. If we consider a simple modification, then the expander is set to 13 V. The contactors are soldered behind the resistor. It should also be noted that you will need a transceiver circuit with a conductivity of about 5 microns.
If you use elements of high sensitivity, then there is a risk of voltage increase. In this case, it is more expedient to install switched thyristors. They are sold with and without insulators. Most often, the permissible overload level for the elements is 4 A. They work from dipole-type converters. Contacts will swing to install only in front of the modulator.
Motion sensor model
Motion sensor devices are very easy to make. Modules are allowed in this caseuse a wave type with a conductivity of 4 microns. In this case, the rated voltage should be about 30 V. Transceivers for devices are selected on wire resistors. If we consider a circuit with dipole conductors, then an expander is needed. It should also be noted that experts advise not to use conductive resistors with low sensitivity. They have a low conductivity threshold, they quickly overheat. Capacitors for the relay are selected at 4 pF. This capacitance is sufficient for fast pulse generation.
Device for light sensors
Bistable relay for sensors can be made on the basis of two high conductivity modules. First of all, when assembling, a resistor is prepared. Its nominal voltage should be 15 V. It is also worth taking care of a capacitor circuit with a high capacitance. Only one thyristor is needed. Experts say that you can improve the stability of the element by using variable blockers.
These devices are sold with and without covers. Their operating frequency fluctuates around 40 Hz. In this case, the resistance in the circuit does not fall below 55 ohms. Expanders are installed at the beginning of the circuit and must be in front of the contacts. A tester can be used to test conductivity.
Modifications with variable modulator
Bistable relay with a variable modulator is well suited for detectors of different directions. Majoritymodifications are available with open resistors. To independently assemble the relay, it is more advisable to use a phase expander. The modulator in the device is installed immediately after the contacts. It should also be noted that there are modifications on wired expanders. They have a low conductivity threshold. However, they can operate on AC circuits. The stabilizer for the relay can be selected on a conductor basis. The nominal voltage of the element must be at least 24 V.
Application of contact modulators
Bistable relays with contact modulators are used in DC and AC circuits. Many modifications are available with open-type resistors and conductivity at around 5 microns. At the same time, their nominal voltage is only 14 V. The modulator is installed in the device behind the resistor. It should also be noted that only one capacitor is required for assembly.
If we consider a simple relay, then it is more expedient to use an element of a capacitive type at 3 pF. Its conductivity should not be 15 microns. Stabilizers in devices of this type are installed with a phase switch. At a nominal voltage of 10 V, the model produces an average of 30 Hz.
Expanders are used in different frequencies. Experts say that only open filters with a conductivity of 5 microns can be taken. However, one must take into account the fact that they have high heat losses. Capacitors with these filters will be heavily loaded.
