While the primary purpose of EOLR is to offer electrical wires constant supervision, this semiconductor is used in other ways as well.
1. Fire prevention
Houses and buildings must have fire alarms installed. That effectively means fire systems are continually monitoring the fire zones.
These systems are open devices, which means that they don't have a current, but hold a specific voltage. That is because when the circuit is closed, it means a fire has broken out.
Therefore, a control panel will see a fire alarm under the same light as an emergency that requires the presence of the fire department. That is because it will see the system as open, which means it is compromised.
To avoid this problem, EOLRs are used to close the circuit and control the system.
2. Double check
Some manufacturers allow users to install two EOLRs. The purpose of the second resistor is to have an even more accurate understanding of the state of the wires in any given edification. In case anyone has forgotten, one EOLR differentiates between an open circuit, a closed circuit, and a shorted circuit.
The second resistor will allow the control panel to monitor and understand the difference between an open sensor and a broken circuit.
The usage of two EOLRs represents the maximum level of security this type of resistor can offer. No control panel will benefit from having more than two semiconductors monitoring the wiring at all times. So while the idea of having two EOLR sounds appealing, it should be left to situations that are deemed necessary.
So ask New York Engineers if you qualify for two EOLRs instead of one.
Lately, manufacturers have allowed control panels to have more than one zone of control interlacing each other. Each zone will have different voltages, which means they will require different resistors.
Luckily, modern EOLR can be calibrated to different voltages, which allows for more coverage without having to pay anything extra.