Frequently Asked Questions
How Do I Find the Serial Number on a Honeywell 5800PIR-RES?
The Serial Number for a Honeywell5800PIR-RES can be found on a sticker on the back of the sensor. It can also be found by programming it into a panel. Learn about the 5800PIR-RES.
Why Can't I Use Z-Wave Security Sensors With My Alarm System?
Alarm system manufacturers still deem Z-Wave security sensors to be too unreliable for general use. Z-Wave is best-suited for automation functions. Learn about Z-Wave technology.
What is AlarmNet?
AlarmNet is best known as the division of Resideo (formerly Honeywell) that manages Total Connect 2.0 and maintains the AlarmNet360 Servers. Learn about AlarmNet.
What Do the Buttons Mean on a Honeywell Alarm Key Fob?
A four button Honeywell Key Fob has designated buttons for Arming Away, Arming Stay, Disarming and Panic. But each input can be set individually. Learn about Honeywell Key Fobs.
Why Is My Honeywell L5100 Showing a Blank Screen?
The screen for a Honeywell L5100 will go blank whenever the system is not powered on. Restore power to restore the screen. Learn about the Honeywell L5100 Alarm System.
Honeywell 5881ENH vs Honeywell 5881ENM
The 5881ENH and 5881ENM are both wireless receiver modules for VISTA Panels. The difference between them is the number of zones they support. Learn about these wireless receivers.
Can I Program My VISTA 21iP To Use IP Only?
A brand-new VISTA 21iP comes with a built-in IP communicator for a wired ethernet connection. A cellular communicator will need to be added separately. Learn about the VISTA 21iP.
How Do I Program a Honeywell Alarm With No Master Code?
The Master Code is not required when programming a Honeywell Alarm System. Instead, the Installer Code is used. Learn about Honeywell Alarm Systems.
What Gauge Wire Should I Use for Door/Window Contacts?
Alarm Grid recommends using 18-gauge, 2-conductor wire for door and window sensors. But many DIY installers use 16-gauge or 22-gauge wire without issue. Learn about wired sensors.
Will an Encore FireFighter FF345 Work w/ a CO?
The Encore FireFighter FF345 is a life-safety sensor takeover module that listens for the unique temporal sound of an activated smoke or CO sensor. Learn about the FF345.
The Serial Number for a Honeywell5800PIR-RES can be found on a sticker on the back of the sensor. It can also be found by programming it into a panel. Learn about the 5800PIR-RES.
Added:
Why Can't I Use Z-Wave Security Sensors With My Alarm System?
Alarm system manufacturers still deem Z-Wave security sensors to be too unreliable for general use. Z-Wave is best-suited for automation functions. Learn about Z-Wave technology.
Added:
What is AlarmNet?
AlarmNet is best known as the division of Resideo (formerly Honeywell) that manages Total Connect 2.0 and maintains the AlarmNet360 Servers. Learn about AlarmNet.
Added:
What Do the Buttons Mean on a Honeywell Alarm Key Fob?
A four button Honeywell Key Fob has designated buttons for Arming Away, Arming Stay, Disarming and Panic. But each input can be set individually. Learn about Honeywell Key Fobs.
Added:
Why Is My Honeywell L5100 Showing a Blank Screen?
The screen for a Honeywell L5100 will go blank whenever the system is not powered on. Restore power to restore the screen. Learn about the Honeywell L5100 Alarm System.
Added:
Honeywell 5881ENH vs Honeywell 5881ENM
The 5881ENH and 5881ENM are both wireless receiver modules for VISTA Panels. The difference between them is the number of zones they support. Learn about these wireless receivers.
Added:
Can I Program My VISTA 21iP To Use IP Only?
A brand-new VISTA 21iP comes with a built-in IP communicator for a wired ethernet connection. A cellular communicator will need to be added separately. Learn about the VISTA 21iP.
Added:
How Do I Program a Honeywell Alarm With No Master Code?
The Master Code is not required when programming a Honeywell Alarm System. Instead, the Installer Code is used. Learn about Honeywell Alarm Systems.
Added:
What Gauge Wire Should I Use for Door/Window Contacts?
Alarm Grid recommends using 18-gauge, 2-conductor wire for door and window sensors. But many DIY installers use 16-gauge or 22-gauge wire without issue. Learn about wired sensors.
Added:
Will an Encore FireFighter FF345 Work w/ a CO?
The Encore FireFighter FF345 is a life-safety sensor takeover module that listens for the unique temporal sound of an activated smoke or CO sensor. Learn about the FF345.
Added: