Backup Power For Maglocks Guide

Author: Brian Rhodes, Published on Aug 20, 2018

When the main power fails, many believe maglocks must leave doors unlocked.

However, battery backed up maglocks are allowed according to IBC / NFPA code. It just needs to be done properly. We examine the five critical steps for using backing up macklock power correctly:

  • Understanding Codes
  • Calculating Power Budgets
  • Factoring In Power Source
  • Connecting Power Supply Fire Alarm Loops
  • Including The AHJ

In this note, we look at what the code actually says about power backups for maglocks, where they might be illegal, and how to do it right when allowed.

**** *** **** ***** *****, **** ******************* ***** ***** ********.

*******, ******* ****** ** ******** *** ******* ********* ** *** / **** ****. ** **** ***** ** ** **** ********. We ******* *** **** ******** ***** *** ***** ******* ** macklock ***** *********:

  • ************* *****
  • *********** ***** *******
  • ********* ** ***** ******
  • ********** ***** ****** **** ***** *****
  • ********* *** ***

** **** ****, ** **** ** **** *** **** ******** says ***** ***** ******* *** ********, ***** **** ***** ** illegal, *** *** ** ** ** ***** **** *******.

[***************]

Multiple *******

**** ** ***** ** ********** **** ********* ***** **** ***** unsecured **** ***** *****, ***** *** ***** ***** ************** ** make:

  • *****:************* *** ********** ***** *** *** **** ***** ** * building's *** ********** ** *** *********** *****.
  • ***********: *********** ***** **** ************ **** * ********* ******.
  • *** ***: ******* ******** **** *** ******** ********* ** *** ****, and ***** **** ******** ****** ** *** *******.

*****

********** ** ****, ******** ***** ** *** ****** *** *** of ******* ****** ** ********, ******* *** ******** '**** ****** **** ****** ** ********' theme. ** ***** ****** ****** ******* *******, ***** ********** *** made ** *** ***** *****. *******, ***** *** ** ******* if **** *********. **** * **** ** ***** ********, ******** the **** ***** ** ********** ******** ********** ** ********* ****:

  • **** *** (****) *.*.*.*.* (************ ********** ****** **** **********)
  • **** *** (****) *.*.*.*.* (******-********** ****** **** **********)
  • **** ** (****) **.*.* ************ ****** *****
  • *** ****.*.*.* (****)

(*** **** ****** ** ***** *********, ***:**** ****** ****, ***, *** *** ***** *** *********)

*** *********** ******** ****** ***** **:

**** ** ***** ** *** ****** ******** **** ************* ****** the ****.

*******, *** ****** **** *** ******** *** *** ** ****** power.*** ******** **** ** *** ********* ** ****** ***** ** connected ** *** **** ***** ****** *** ****** **** *** system ** ********* ** **** ***** ** ****.

*** ***** ************ *** **** * ********* ** ***** '***** codes' **** **** ********* ** *** *****, ** *********** ***** awareness ** ***** ******** ** ****** ***** ** **** ** a ******* ****, ***** ********** **** ******* *** ***. (*** the **** ******* ** **** ******.)

Calculating ***** *******

******* *** **** * ******* **** **** * ************* ** *******. *********** ********* **** ****** ******* **** *** ***** ********* ******* as *** ******* **** ** ********* **********, ****** ***** **** ***** **** **** *** ***** when *********.

******** ******* *** ***** *********** ******** ***** ** ** *** ** ***** ** *****:

****** * ***** ****** ****** ********* **** *** * *** hour ************* **** **** **** ********* ***** (*** **** ** ****** doors) *********. *** ***** ***** ******* **** *.** **** *** hour, ** **** * ** *** ******, ***** **** **** unlocked** **** **** ***** *****. ** ****, ********* ******* *** still ******* ****** ******** ********, **** ** ********** ************ ******* normally********* *****.

*********** **** ****** ** *********** ** ***** ******* **** **** also ** ******* ** *** ****** ******, ********* *** ***********, readers, *** **** **** *** ******* **** *** ****** *********. The ***** ****** ********** **** *** ****** ****** *** ******* shave *** ****** ***** ******** ** **** ******* ** * large ******, *** ***** ******** ** * ****** ** ******* design.

Designing ******* ****** - ****** / **** ********

**** ** ********* * ******* ****** ****** *** ** ************ specific (*********) ***** ** **** ******, *** ******* ****** (******) unlocked **** ***** *****. ** ******, *** ******** **** ******* with ******** ******** ********** *****, *** ** *** ******** ** maximizing ****** *** ******** *****, ****** *** **** ** ** excluded.

Factoring ** ********** ***** *******

*******, **** ** *** ********* ********** *********, * **** ********** may *** ******* ******* ********** ***** *** *** ****** ******* for ******* **** ** *****.

********, *** ******* **** ** ******* ** **** ***** *** power **** ** ******** **/*** ** ********** ********. *******, ** cases **** **** ***** ***** ** *** ****** ******** ******** maglocks ** *****-******* *******, ***** *** **** ******** *** ****** through *** ********** ******. **** ***, **** ********** ******** *** not ******** ** ***** ** ******* *********** **** *** **** periods.

***** **** ******* *** **** ****** ******* ** ***** (**: 35mA - *****), *** **********'* ****** ***** ******** *** *** be ***** ** **** ******* ********** ******** ** ***** ******** (ie: ***** - *****+)

(****: ***** ******** ** ****** ** *** ******* **** ****** power **********.)

** ** ******* ** **** **********, *** *** *** **** codes ******* '****** ************' ** ***** ** ********, **** **** ******** *** **** ********* ***** * ******** linear ***** ******, *** ******* ** ****-**** ******** ** *** controller. ** ***** *** *********** ** ****-**** ***** ******, ********** those **** ***, ***** ******* ****** ******* ********.

Batteries ** *** ** **********

** ** ***** ****** **** ********* *** *** ****** *** only, ** **** ********* ******, ** ****** *****. *** ******* or *********, ** ***** ***** ****** ***** *** ******** *****, *** *** **** ******** *** ***** ********* ** ******, but *** ******** ** ****** * *******. ** * ******, especially ** ******** ************** ** ******** **********, *** ****** ******** may ** ****** ** ** * *********. ** **** ****, the ****** ** ********* **** **** *********** *** **** **** hundreds ** **** *** ****. ** ***** **********, *** *** length ** *** ****** ****** *** ****** *** ** * realistic *******.

Power ****** **** ***** *****

*** ***** *** ***** ** *** *********** *****: **** *** fire ***** *********, *** ***** ** ******* **** ****. **** typically ** *********** ** ***** *** ****** ***** ****** **** the **** ***** *** ** ***** ****. **** *** ***** is ******, ** ***** * ****** ** *** ****** **** it **** *** ***** ** ******** ****** ** ***** ** it.

**** ****** ***** *** ******* ************* ******* ***** ************, ******** they *** ********* ***** ** ******* ** *** ** ******* their ********** ** **** ** *******. ** **** *****, *** install ************ ***** '********* **** **** ********** ***/** ***** ****** ** **** ******* power **** ***** **** ***** ** *********', ** *******.*******, ********** ***** *** ***** **** *** *** **** ** accomplish ** ********** ***********.

*** *******, **** ******** ****** **************** **** ************* ***** **** ****** ********** ***********:

***** ** *** ******* ** ******** ****** ** * ****** power ******, **** ** **** ** ********* ** **** ***** when * **** ***** ** ******** ** *** **********. *************, the ***** ****** ****** *** ******* **** ***** ***** ******** instead ** ********** ** * **** **********. ************ *****, *******, **** ***** **** *** ***** ** ***** device ********* ** *** ******: *******, ***********, *** *** ****.

**** *** ***** *** **** *********, *** *** **** ********** of '******** ******' ***** * ***** ********** **** '******** ********'.*********, schematically ******** *** ***** **** ****** ** *******, *** ***** what ********** ****** ***** ** ********, ****** *** ** **************.

Including *** ***

**** ***** *** **** ** ****, *** ****** ***** ***** be "**". ** *** ************** ****** ************, ** ***, **** *** *******, *** **** ** ****. There *** *** ***** ******* *** ***** **** *** *** accept *** ****:

  • ***** ********* ******:**** ****** ** *** **** *** *********** **** ************ ****** enter * ******** ******* *** **** ** ******.
  • ****** ***********:*************, **** ********** ****** ** ******** ******* ** ******* ************** ************, *** ********* ***** *********** **** *** **** ****** and **** ******** ********* ****** * ********* ********.

** * ******, **** ***** ******** ****** ***** ****** ***** of ***** ***** ** **** ***** ** * ****** ** local ********* *** **** *** ******** *** ** *** ***** of ***** **********.

Proceed **********

***** ****** ******** *** *********** ***** ** ****** *** ********* ** **** **** ** many. ***** ***** ******** *** ** **** ********* ** ****** to ******* **** ***** ***** ** ******** *****, **** *** not ****** *** **** ******. ** *** ******* ****** ** too *********** ** ****** ** ****** ***** **** *****, **** backup ***** **** ** ******** ** **** ***** ******.

******* ******* * **** ********* ****** *** ******* ******** ** the *** ****** * ******** *** *** *** ****** ******.

[****: **** ***** *** ********* ********* ** ****, *** ************* revised *** ******* ** ****.]

Comments (1)

Something missing from the diagram above is that for a door in the path of egress using a maglock, it must have both a NFPA approved PIR and REX button in line with the maglock power. Simply the input from firealarm at the power supply is not enough. The REX is required to release for a minimum of 30 seconds while the PIR release is not required to be maintained. The PIR and REX can have additional outputs wired to the security panel to shunt the DPS triggerd forced alarm, but per code they must be able to physically break power.

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