Time relay PO-405 with delayed dropout, contacts: 1NO, I=10A, connection lead

Time relay with delayed dropout – reliable circuit maintenance

The PO-405 time relay is a device designed to maintain the power supply to the receiver after the control voltage is lost. This solution is ideal for applications where short-term maintenance of device operation after the main power is switched off is required, e.g. in bathroom ventilation systems, corridor lighting or blind control. Thanks to the delayed dropout function, the relay ensures smooth and comfortable operation of connected devices.

Functionality and application

The PO-405 relay is characterized by a simple construction and easy installation. Its main task is to maintain the circuit's on state for a set time (1-15 seconds) after the control signal is lost. After this time, the circuit will automatically switch off. The reappearance of the control voltage before the end of the set time will restart the cycle. This makes the relay indispensable in applications requiring precise control of device operating time.

It will find application in:

• Ventilation systems: Maintaining the operation of a bathroom fan after the light is switched off.
• Lighting: Delayed switching off of corridor or staircase lighting for increased comfort.
• Home automation: Controlling blinds or roller shutters with a time delay.
• Control systems: Use in various industrial and building automation systems where delayed circuit disconnection is required.

Technical characteristics and construction

The PO-405 relay has been designed with reliability and durability in mind. Made of high-quality materials, it ensures stable operation even in difficult environmental conditions. It has switching contacts with a current of up to 10A, which allows control of most standard electrical receivers. Surface mounting simplifies installation and integration with existing electrical infrastructure. Screw terminals provide secure and safe connection of wires with a cross-section of up to 4 mm². Built-in LEDs indicate the on state and the presence of the supply voltage, which facilitates diagnostics and control of the device's operation. The adjustment of the holding time is done using a potentiometer, which allows for precise adjustment of the relay's operation to individual user needs.