FF BIS-414I bistable sequential relay DIN-rail, 1-function, 230V or 24V AC/DC, 2×16A contacts, InRush 160A/20ms, 2×1P, screw terminals, 1 module

The FF BIS-414I bistable sequential relay is a compact DIN-rail module designed for one-function control in electrical installations. It accepts either 230V or 24V AC/DC control voltage and provides two single-pole switched outputs. The relay is built for panel integration with screw terminal connections and a one-module width that saves space in distribution boards. Its design includes high inrush handling for loads with significant startup currents.

Advantages

The device offers selectable coil voltage (230V or 24V AC/DC) to match different control systems and enables energy-saving bistable switching that keeps contacts in their last state without continuous coil power. Two independently switched single-pole outputs rated at 16 A each allow control of separate circuits from one module. High inrush capability (160 A for 20 ms) makes it suitable for switching inductive or capacitive loads such as certain types of lighting or motor starters. The screw terminals provide secure, serviceable wiring connections suitable for industrial and building automation environments.

Suitable for

• Lighting circuits and timed lighting sequences in residential and commercial panels
• Sequential switching of heating, ventilation or pump circuits
• Panel-mounted automation tasks where compact, bistable control is required
• Applications with high startup current devices that need short-duration inrush tolerance

Key specifications

• Control voltage: selectable 230V AC or 24V AC/DC
• Contact configuration: 2 × single-pole (2×1P)
• Contact rating: 16 A per contact at rated voltage
• Inrush capability: 160 A for 20 ms
• Mounting: DIN-rail, one-module width
• Terminal type: screw terminals for mains and load connections
• Function type: bistable sequential relay (one control function)

How to use

Install the relay on a standard DIN-rail inside the electrical panel, ensuring the module is aligned and clipped securely. Connect the control supply to the coil terminals according to the selected voltage (230V or 24V AC/DC) and wire loads to the two single-pole output terminals using appropriate conductor sizes and protective devices. Configure any sequence or control logic externally so that the relay receives the required pulse or control signal to change its bistable state. Verify correct polarity and tighten screw terminals to specified torque values before energizing.

Usage recommendations

Use appropriate overcurrent protection sized to 16 A per circuit and consider inrush currents when selecting upstream breakers or fuses. For reliable operation, install in a dry, vibration-free panel environment and perform periodic inspection of terminal tightness. Ensure compatibility of connected loads with the relay's inrush rating and contact type.