On the flip side there are cases where extra protection is desired. Then again if between the control panel and the fire.

Designing A Fully Supervised Loop Fsl Eol Alarm System
Eol wiring diagram. When a sensor is wired with control panel end of line resistors are used in order to monitor alarm and tamper circuits. Once theres a raging fire its a little bit late to troubleshoot and fix the wiring issue. In past it was common to wire a sensor with double pole technique. Alarm systems are now categorized in different grades considering the risk or threat protected and the equipments in it to do sogenerally there are four grades named numerically from 1 to 4 with increasing risk factors. The circuit needs to be completed to pass the continuity testing electricity through all the wires of the class a or class b circuit. Eol is the end of line resistor wiring in burglar alarm installation.
There are however occasions when we may need to configure zones to operate without eol supervision. End of line resistors eols are very important for circuit and loop supervision. When you wire an alarm system whether it is addressable or conventional all wired devices as well as the loop or the conductors used in wiring must be supervised for operation and connectivity by the main panel through the eolthere are two ways to wire eols. It is always good practice to use end of line resistors eols in any type of security circuit. How to use eol wiring in alarm systems grades in alarm systems. How to wire security alarm zones.
An eol or end of line resistor is used to complete a circuit.