Its called an End of Line resistor, because it goes at the End of the line..

When it comes to home security, burglar alarm systems are essential for protecting your assets. While these systems involve various components, one often overlooked but critical element is the end-of-line resistor (EOL resistor). EOL resistors are crucial for your burglar alarm system's effectiveness. End-of-line resistors serve two primary purposes:

Circuit Integrity Monitoring: EOL resistors monitor circuit integrity. They ensure that the wiring remains intact, and any breach, like an opened door or window, triggers the alarm by interrupting the circuit. This guarantees that wiring faults or tampering don't go unnoticed.

Simplified Troubleshooting: EOL resistors simplify troubleshooting. Any changes in resistance values signal faults to the control panel, making it easier to identify and fix issues quickly, ensuring your alarm system's efficiency.

EOL Resistors Enhance Security

EOL resistors significantly enhance security:

Tamper Detection: They detect tampering attempts, such as cutting or short-circuiting wiring, alerting the control panel and triggering an alarm.

Reliability: Continuous circuit monitoring ensures your alarm system remains reliable, crucial during emergencies when flawless performance is vital.

Faster Response: EOL resistors help pinpoint breach locations swiftly, enabling faster responses from security personnel or law enforcement.