F&F BIS-411 2Z Impulse Relay 230V AC 8A 2NO

The F&F BIS-411 2Z is a bistable impulse relay engineered for 230V AC electrical systems, offering a robust solution for controlling lighting and various electrical devices. By utilizing momentary push-buttons, this relay enables users to toggle circuits on and off from multiple locations, making it an ideal choice for complex wiring setups in both residential and commercial environments. The unit features two normally open (2NO) contacts, ensuring reliable performance and seamless integration into standard electrical distribution boards.

Advantages

This impulse relay provides significant flexibility in electrical installation design by allowing the control of a single load from an unlimited number of points using simple parallel-connected push-buttons. Its bistable mechanism ensures that the relay maintains its state even after the control signal is removed, which contributes to energy efficiency and operational stability. The compact design facilitates easy mounting on standard DIN rails, while the 8A load capacity is sufficient for most standard lighting circuits and small appliance control tasks.

Suitable for

• Controlling lighting in hallways, staircases, and large rooms from multiple switches.
• Managing electrical appliances from various locations within a building.
• Modernizing existing electrical installations to support multi-point control.
• Residential and commercial automation projects requiring reliable bistable switching.

When it may not be suitable

This relay is not designed for high-power industrial loads exceeding its 8A rating, and attempting to use it with such equipment may lead to contact damage or failure. Additionally, it is intended specifically for 230V AC systems and is not compatible with low-voltage DC control circuits or specialized dimming applications.

Key specifications

• Supply voltage: 230V AC
• Maximum load current: 8A
• Contact configuration: 2 normally open (2NO) contacts
• Mounting type: DIN rail
• Control method: Momentary push-buttons

How to use

The F&F BIS-411 2Z is designed for installation within an electrical distribution cabinet on a standard DIN rail. Connect the phase and neutral wires to the supply terminals according to the wiring diagram provided on the device housing. The control circuit should be wired using momentary push-buttons connected in parallel to the control input. Each press of any connected button will toggle the state of the relay contacts, switching the connected load on or off.

What to consider before purchase

• Ensure the total power consumption of the connected load does not exceed the 8A limit.
• Verify that your existing wiring supports the use of momentary push-buttons.
• Confirm that the installation space in your distribution board is sufficient for the relay dimensions.
• Check that the supply voltage matches the 230V AC requirement.

Usage recommendations: For optimal longevity and safety, ensure all electrical connections are tightened securely during installation. It is recommended to use a qualified electrician for the setup to ensure compliance with local electrical codes and safety standards.