What would you like to do?

When do you need an end of line resistor in a burglar alarm?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

When do you need an end of line resistor in a burglar alarm?
he purpose of EOLR's is to allow the control panel to supervise the field wiring for open or short circuit conditions. How the alarm responds to each depends on the panel as well as system zone programming, but generally speaking, an alarm views an open circuit as a fault or alarm condition, and a short circuit as a trouble or alarm condition (if armed). The purpose of EOLR's is to allow the panel to differentiate between the two conditions by looking for a known resistance.
EOLR's should be installed at the last device on the loop, electrically speaking, and not inside the control, unless special conditions are met. The benefits of EOLR's on protective zones with all concealed wiring is commonly argued by professional installers, as well as EOLR's installed inside the control unit, negating their effetiveness, as well as disabling the EOLR feature and using NC (normally closed) loops for zone definitions. The use of EOLR's is recommended and is particularly important when the field wiring is subject to damage or compromise.
A fire EOLR should always be installed at the last device and never inside the control or across the zone defined as fire, as this is an inherent safety issue.
Some equipment supports Double End of Line Resistors (DEOLR) to further differentiate between conditions that may exist on the loop.


I've linked my source.
4 people found this useful
Thanks for the feedback!

Why do you need resistors?

  Resistors are used for a variety of purposes: to allow voltage levels to be reduced when in series circuits, to bleed off capacitors, to assert the output level of tri-s

How do you replace burglar alarm battery?

  If you're relatively handy, this is not a difficult task. The hardest part will be opening the enclosure the control panel sits in. A typical residential burglar alarm
What is the end of line resistor used for in fire alarm circuits?

What is the end of line resistor used for in fire alarm circuits?

An End of Line resistor is used to create a small constant load in a protective zone or loop. The control panel monitors the current in the loop to detect if the wires have
What are the Inputs and outputs of a burglar alarm?

What are the Inputs and outputs of a burglar alarm?

The Input is the alarm detecting movement in the required area. The output is the alarm making a distinctive noise to inform the owner of the premises

Input and output devices in a burglar alarm?

A security system, also known as a "burglar alarm," contains two  primary device categories. Sensors are the system inputs by serving  as its eyes, ears and even noses. Thes

Who invented the burglar alarm in 1911?

The burglar alarm was invented by a Boston inventor Augustus Pope in 1850 and developed commercially by Edwin Holmes and Thomas Watson. Their version was patented in 1858.

How can you build your own burglar alarm?

  An alarm consists of inputs, outputs, and some access method. An arduino microcontroller could make an excellent backend for a DIY alarm. You'd need sensors for doors,

What is a function of a resistor in a fire alarm circuit?

A resistor in a sensor circuit is used as a simple way to monitor the function of the circuit. The resistor has a calibrated and known voltage drop and current while the circu
Why are burglar alarms useful?
In Uncategorized

Why are burglar alarms useful?

Because the warn people of good standing that a burglary may be  occurring, allowing these people to do something about it and catch  the criminals.