12V Normally Open Vibration-Activated Delay Relay Module with Alarm (Time-Adjustable Trigger Circuit)

Description

Description

The 12V Normally Open Vibration-Activated Delay Relay Module is an intelligent, standalone vibration detection and timed switching device designed for security systems, industrial equipment protection, and automation applications. Operating on a standard 12V DC supply—compatible with automotive systems, security panels, battery backups, and industrial control circuits—this module combines a high-sensitivity vibration sensor with a precision delay timer and a powerful built-in relay.

What sets this module apart is its Normally Open (NO) trigger design combined with an adjustable delay circuit. The module remains in a low-power standby state until vibration is detected. Upon detection, the relay instantly closes (activates) and remains closed for the programmed delay period—even if the vibration stops immediately. This “latch and hold” behavior ensures that alarms sound long enough to be noticed, equipment shutdowns complete properly, and notification signals are reliably transmitted .

The module features dual adjustment capabilities: a sensitivity potentiometer allows you to set the vibration threshold from light taps to heavy impacts, while a delay time potentiometer (or DIP switches on advanced models) lets you program the relay activation duration from as short as 0.1 seconds up to 1 hour or more . An optocoupler-isolated trigger input provides excellent noise immunity, preventing false triggering from electrical interference .

LED indicators provide clear visual feedback: a red LED shows power status, and a green LED illuminates when the relay is activated . The relay output is rated for 10A at 250V AC or 30V DC, capable of controlling alarms, sirens, lights, motors, contactors, or PLC inputs directly .

Whether you need to create a vibration-triggered burglar alarm for a safe or tool cabinet, detect tampering with industrial equipment, monitor conveyor belt jams, protect a workshop from unauthorized access, or build a seismic alert system, this 12V Normally Open Vibration-Activated Delay Relay Module delivers reliable, programmable protection without requiring microcontrollers or complex programming.

Key Features

• Normally Open (NO) Trigger Design – Relay remains open (inactive) under normal conditions; closes (activates) when vibration is detected. Ideal for alarm and notification applications.

• Adjustable Vibration Sensitivity – Onboard potentiometer allows precise threshold setting from light touch detection to heavy impact only.

• Wide Adjustable Delay Range – Programmable delay from 0.1 seconds up to 1 hour (selectable via DIP switches or potentiometer, depending on model) .

• 12V DC Operation – Compatible with automotive systems, security panels, industrial controls, and battery-powered installations.

• High-Power Relay Output – 10A / 250V AC or 10A / 30V DC contact rating controls alarms, sirens, lights, motors, and contactors directly .

• Optocoupler-Isolated Trigger Input – Provides excellent noise immunity and prevents false triggering from electrical interference .

• Anti-Reverse Protection Diode – Protects the module from damage due to accidental reverse polarity connection .

• Dual LED Indicators – Red LED indicates power ON; green LED illuminates when relay is activated (vibration detected + delay active) .

• Standalone Operation – No microcontroller, programming, or software required – works immediately after wiring and adjustment.

• Compact Form Factor – Small footprint (approx. 60mm x 44mm) fits easily into security panels, equipment enclosures, or DIY projects .

Technical Parameters