F&F BIS-411BM Bistable Relay with Manual Control Button and Memory, DIN Rail Mount, 230V

The F&F BIS-411BM is a bistable relay engineered for the efficient control of lighting and electrical circuits. This device allows for the switching of connected loads from multiple locations using parallel-connected momentary push-buttons. Equipped with a built-in manual control button and a memory function, the relay ensures that the current state of the circuit is retained even after a power supply interruption, providing consistent operation in various electrical installations.

Advantages

The primary benefit of this bistable relay is its versatility in managing electrical loads through simple impulse signals. The integrated memory function eliminates the need for manual resetting after power outages, which enhances convenience and reliability. Furthermore, the inclusion of a manual control button directly on the housing allows for immediate local operation, making it an ideal solution for both residential and industrial automation systems that require robust and flexible switching capabilities.

Suitable for

• Lighting control in hallways and staircases
• Managing electrical circuits from multiple remote points
• Industrial automation systems requiring state retention
• Residential smart home electrical installations

When it may not be suitable

This relay is not designed for high-power industrial motors or loads that exceed the specified current rating. It is also not intended for applications requiring complex programmable logic or dimming functions, as it operates strictly as a binary switching device.

Key specifications

• Supply voltage: 230V AC
• Mounting type: DIN rail (TH-35)
• Control input: Momentary push-buttons
• Memory function: Retains state after power loss
• Manual control: Integrated button on the device

How to use

The relay is designed for installation on a standard 35mm DIN rail within an electrical distribution board. Connect the phase and neutral wires to the designated terminals according to the wiring diagram. Connect the momentary push-buttons in parallel to the control input terminals. Once installed, a short press on any connected push-button or the manual button on the relay will toggle the output state between on and off.

What to consider before purchase

• Ensure the total load current does not exceed the relay's maximum switching capacity
• Verify that the control circuit is compatible with 230V AC signals
• Confirm that the installation space allows for DIN rail mounting

Usage recommendations

For optimal performance and safety, ensure all electrical connections are tightened securely and the device is installed by a qualified professional in accordance with local electrical regulations.