18.21.0.024.0300 Finder PIR 1pole 10A DC 24V output contact

Why Choose the Finder 18.21.0.024.0300 PIR Movement Detector?

The Finder 18.21.0.024.0300 is a compact PIR movement detector with a 24 V DC supply, designed for automatic control applications in building automation, industrial control and low-voltage electrical systems. Part of Finder's Series 18, it combines passive infrared movement detection with an output contact for switching compatible loads or providing an occupancy signal to a control system.

Operating from a nominal 24 V DC supply, the 18.21.0.024.0300 features one normally open output contact rated at 10 A. The potential-free relay output allows the movement detector to interface with suitable control circuits independently of its DC supply, making it useful for automation systems, relays, contactors and lighting control arrangements.

The PIR detector provides a wide 110° detection angle and incorporates adjustable timing and ambient light settings so that operation can be matched to the installation. Its compact surface-mounted design makes it suitable for locations where reliable automatic movement detection is required from a low-voltage DC-powered sensor.

Key Advantages

• 24 V DC supply is ideal for industrial control and building automation systems.
• PIR movement detection provides automatic switching or occupancy signalling.
• Single normally open relay contact provides a versatile switching output.
• 10 A contact rating for compatible electrical loads.
• Potential-free output contact separates the switched circuit from the detector's 24 V DC supply.
• 110° detection angle provides broad movement coverage.
• Adjustable switch-off timing allows operation to be tailored to the application.
• Integrated ambient light sensing enables movement-dependent operation according to surrounding light conditions.

Key Features

• Finder Series 18 movement detector.
• Passive infrared (PIR) detection technology.
• 24 V DC nominal supply.
• 1 normally open output contact.
• 10 A rated output contact.
• Potential-free relay output.
• 110° detection angle.
• Adjustable switch-off delay.
• Adjustable ambient light threshold.
• Designed for automatic lighting and building automation applications.
• Suitable for interfacing with compatible industrial control circuits.

24 V DC PIR Detection for Control and Automation

A 24 V DC PIR movement detector is particularly useful in industrial and building automation systems where low-voltage DC control power is already available. The Finder 18.21.0.024.0300 detects changes in infrared radiation caused by movement within its sensing area and operates its relay output according to the configured timing and light-level settings.

Because the detector provides a potential-free output contact, the relay output can be incorporated into an appropriate control circuit without being electrically tied to the detector's 24 V DC supply. This makes the device suitable for signalling PLC inputs or operating compatible relays, contactors and automatic lighting control circuits within the specified contact ratings.

Typical Applications

• 24 V DC building automation systems.
• Automatic lighting control.
• Industrial control panels and automation equipment.
• PLC occupancy and movement signalling.
• Corridors, access areas and passageways.
• Commercial and industrial building controls.