A relay is a device for switching an electric circuit when changing input influences. The classic version is an electromechanical device that opens or closes contacts when passing through an electric current winding. Pulse relays for lighting control also have two states: on and off. But their distinctive feature is the switching state with a single pulse. After pressing the switch button, operating on the principle of an electric bell button, a short-term voltage pulse passes through the coil winding or control circuit, which serves to switch the power contacts. If the voltage remains on the ordinary relay after switching on, then on the pulse (bistable) it is removed. But at the same time, switching of the contacts switching the load still occurs.
The benefits of pulse relays
- No energy is consumed to maintain an on state. Energy is spent only on switching.
- Silent operation.
- Ability to connect any number of passage switches.
- Savings in wiring, as operational management requires a smaller cross section. In addition, two conductors are sufficient for each pass-through switch .
- Many options for use in everyday life and in electronic circuits.
Relay types
These electronic devices are made of several types:
- Electromagnetic The control is carried out by switching the contacts with an electromagnet. When an electric pulse passes through its winding, the switching mechanism is triggered by the generated magnetic field.
- Electronic. Depend on network performance. Leading manufacturers are approaching electromagnetic in quality.
Application of pulse relays
The ability to control light switching is used in stair switches. The built-in timer allows you to turn off the light in the entrance of the house after a set period of time. The pulse relay is installed in the luminaire itself, in the junction box or in the control panel. It can also be part of a BIS-403 ladder machine .
Bistable relays are also used to turn on and off the lighting from different places, providing a simplification of the electrical wiring diagram in comparison with passage switches.
Pulse relay connection for lighting control
The device contains 4 outputs:
- feeding phase;
- zero wire;
- exit to buttons;
- phase output to light bulbs.
The neutral is connected to the light sources separately.
The buttons connect the phase to the lamps. Their number can be no more than 10, otherwise false positives will appear. Usually their number does not exceed 2-4. You can install more than 10, if the control wires are located separately from the power and connect an additional capacitor.
Device and application
Pulse relays for lighting control are very easy to use. Despite the presence of electronics, the device is quite reliable in operation. It includes a sensor unit and an electric coil. Food is made from a network. The circuit contains control circuits and loads. The device works silently and remembers the previous settings.
Pulse relay RIO-1
The pulse relay control lighting RIO-1 contains the following contacts:
- Y - alternately turning the power circuit on and off with successive pressing;
- Y1 - inclusion;
- Y2 - shutdown;
- N is zero;
- 11-14 - normally open contacts.
Here, 2 On / Off buttons are connected for switching lighting from different places, but you can also install it by connecting in parallel to them. The lighting circuits are rated at 10 A. A circuit breaker is installed to protect them. The power contacts of the RIO-1 relay withstand a current of 16 A. If more power is required, the lighting is controlled by a pulse relay through the contactor.
If the lighting is off, then when you press any button switch, the signal is fed to input Y. In this case, the power contact 11-14 is closed, which supplies voltage to the lamps.
When you press the key of any switch again, the phase is again fed to input Y, but at the same time, the power contact 11-14, which turns off the light, is already open. The circuit is much simpler than using walk-through switches and is not at all complicated when connecting new ones in parallel.
To facilitate troubleshooting during short circuits, it is advisable to install a separate circuit breaker on the control circuit with a capacity of 6 A. Then it will immediately become clear which circuit is faulty, according to the protection that has tripped in it. In this case, a smaller wire (0.75 mm 2 ) is required on the control circuit.
Impulse relay ABB
If you need to install a pulse relay to control lighting, abb will do just fine.
Its advantages are as follows:
- The presence of additional findings for centralized management. Through them, you can forcibly turn on or off the lighting, regardless of what condition it is in. Then you can connect all the relays through them and control them simultaneously, for example, turn off all the lights when leaving home.
- Group module E250 GM for selective switching off of lighting on floors or immediately throughout the house.
- Immunity to Electromechanical ABB.
- The presence of manual control of the relay contacts using the lever on the device. This is convenient when automation fails.
- The ability to operate on direct or alternating current creates great advantages for a variety of applications.
Pulse relays for lighting control ABB also have disadvantages:
- the ability to install only in the panel on the DIN rails;
- high price.
Despite the price, many people purchase ABB impulse relays due to their high reliability and resistance to interference.
Legrand blocking relays
Analogs of ABB products are pulse relays for controlling Legrand lighting. Their advantages are as follows:
- a variety of useful functions that can be changed using additional accessories (alarm contact, additional control device, compensator, etc.);
- profitability and reliability;
- convenience of connections;
- independent connection of power and control circuits via separate terminals.
Legrand models also have high prices, but they justify themselves when used properly.
Conclusion
Pulse relays for lighting control allow you to create additional comfort in an apartment or house. When used correctly, they are economical and reliable. In addition, the models of leading manufacturers bring new features to the control of light, without which one can not do without.