D4BL-4CRA Datasheet/PDFSnap Action, Limit Switches
D4BL-4CRA is a snap action, limit switch from Omron, a well-known manufacturer of industrial automation and control components. The D4BL-4CRA is a single-pole, double-throw (SPDT) device with a built-in mechanical lever. It enables or disables a circuit when the lever moves from its normally-open position to its normally-closed position (or vice versa). The lever actuation is triggered by an external force, such as a magnet or a cam. The device has excellent electrical and mechanical specifications, which makes it suitable for a wide range of applications.
Application Fields
The D4BL-4CRA can be used in various industrial automation projects, such as for sensing the opening and closing of doors and windows, lights and motors, handling of material, and other applications where a non-contact signal is needed. It can also be used for detecting the limit position of a machine part, or for controlling the movement of mechanical systems. In addition, it is suitable for automatic control systems, such as for temperature control and sensing.
Working Principle
The working principle of the D4BL-4CRA is based on a magnetic reed switch. The switch is activated by an external magnetic field which causes the reed switches to close an electric circuit. When the external force (e.g. a magnet) is removed, the switch opens and interrupts the circuit. The switch is designed to provide a long operating life, with a high contact bounce resistance and low contact resistance.
The D4BL-4CRA is designed to provide a reliable, high-speed response, with a maximum switching frequency of up to 1 kHz. Furthermore, the contacts are constructed of adhesive-free materials to ensure reliable performance. The device has a working voltage of up to 250VAC, and is rated for a switching current of up to 5A.
Conclusion
The D4BL-4CRA is a reliable, high-performance snap action, limit switch from Omron. It is suitable for a wide range of applications, such as for sensing the opening and closing of doors and windows, lights and motors, handling of material, and other applications where a non-contact signal is needed. The device has excellent electrical and mechanical specifications, and is rated for a maximum switching frequency of up to 1 kHz.