PoE Powered Access Control Tutorial

Author: Brian Rhodes, Published on Oct 12, 2017

Powering access control with Power over Ethernet, like for IP cameras, has become increasingly common.

However, the demands for access power are greater than cameras, and the problems can be significant. Consider that, in access control, many devices may need power (e.g., readers, locks, door sensors). Plus, since access control impacts life safety, special concern needs to be taken to ensure that mistakes are not made in powering.

In this tutorial, we teach:

  • Why PoE for Access Is Useful
  • PoE versus PoE+ Use For Controllers
  • Why 4 Doors Is Typically The Max PoE For Controllers
  • How To Calculate PoE Power Load For Access
  • How To Check Available Field Power
  • The Code Impact Of Using PoE
  • Cost Savings From PoE Powered Access
  • 4 Common Problem Areas When Using PoE Powered Access

We then conclude with a 7 question quiz on PoE Powered Access Control to test your knowledge.

Where PoE For Access Is Useful

PoE is useful in retrofit access control to bring power to the door, instead of installing high voltage electrical for the system first, an expense that can often cost hundreds of dollars per door.

Without PoE, power at the door involves extending or running new circuits from breakers to openings in new conduit with new outlets, power supplies, enclosures, and junction boxes, while PoE routes power through the same cable that connects door devices to an ethernet network.

******** ****** ******* **** ***** **** ********, **** *** ** cameras, *** ****** ************ ******.

*******, *** ******* *** ****** ***** *** ******* **** *******, and *** ******** *** ** ***********. ******** ****, ** ****** control, **** ******* *** **** ***** (*.*., *******, *****, **** sensors). ****, ***** ****** ******* ******* **** ******, ******* ******* needs ** ** ***** ** ****** **** ******** *** *** made ** ********.

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

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  • *** ****** ***+ *** *** ***********
  • *** * ***** ** ********* *** *** *** *** ***********
  • *** ** ********* *** ***** **** *** ******
  • *** ** ***** ********* ***** *****
  • *** **** ****** ** ***** ***
  • **** ******* **** *** ******* ******
  • * ****** ******* ***** **** ***** *** ******* ******

** **** ******** **** * * ******** **** ** *** Powered ****** ******* ** **** **** *********.

Where *** *** ****** ** ******

*** ** ****** ** ******** ****** ******* ** ***** ***** to *** ****, ******* ** ********** **** ******* ********** *** the ****** *****, ** ******* **** *** ***** **** ******** of ******* *** ****.

******* ***, ***** ** *** **** ******** ********* ** ******* new ******** **** ******** ** ******** ** *** ******* **** new *******, ***** ********, **********, *** ******** *****, ***** *** routes ***** ******* *** **** ***** **** ******** **** ******* to ** ******** *******.

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

PoE ********

******* ** ***** *** *** ******, *** *********** *** ***********, is ************* *** **** ***** ** *********.

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

  • ***.*** ******** ** ** **.** *** ** **** ** **** *** enabled ****** ***********.
  • ***.***,'****' ***, ******** ** ** **.** *** **** **** ** a ***** ******** ** ******** *********, ********* ***** ******** ** be **** ** ******* ******* ************. *******, '**' ** ********** with ********* ********** '**'.

** ****** *******, ***.*** *** ** *** ******, *** **** controllers *** ***** * ******* ***** ** *** ****** ****** or ****-**** ******* *** ******** **** ****** ***** ** *******. For *******,****** ****** * ***.*** **** ******** ****** *.**/*** ** ******:

*** **** ** ***, **** ** * ******* ******** *** a ************ ********, *** ****** ***** *** ** ***** *****************.

PoE **** ********** *** *** ** ****** *******

*** ******* ****** ************ ** *** *** ** ******** ***** the**** **********, **** *** ********** ******** ******** *** ******* ****** ******* devices **** ******* *** ** **** *****, *****. *** ********** consumes **** ** *** *** ***** ** ******** *** *** own *********, *** **** ****** ** ******** ** **** ** left ** ********* ******. ******* **** ***** ** ******* ** to *** ********* ***** ***** ** *** ****** **** ********* to **.

PoE *********** ********** ******* ** * ***** ** ****

*********** **** **** ** **** ******** ***** *** *** ********, for *** ****** **** **** ***** *** ********** ****** ** powered, *** ********* ****** ********* '****** ****' ** ***** ******* divide ** **** ********** ** *** **** ** ***** *** locks *** *******.

****** ** *******, ***** * ****** ****** ***** ***** **** a *** ******, **** ****** *******, *********** ********** *** *** just *** ***** ****** ** * *****. **** *** ******* power ** ********* **** **** *** ********** *** ******* ********* one ** *** *****. ** * ******, *** ******* *** common *** ****** ** ****** **** ** ***** *********** **** Mercury **-****, *** **** ***, *** *** **** *****.

Field ******** ******** *******

***** **** ***** ** ******* ******* ***** **** *** ********** - *******, ***** *** **** *******. *** **** ***** ***** devices **** ***** ** ******** ** *********** ******* *** **** be ********** *** **** *******.

  • *******: *** **** ****** ****** ********* ****** *****, **** ****** or **** ******* *** ********* ** ******* ** ****** ***** sourced **** **** *** **********.
  • *****: ********* ** **** *****, ***** ********** ****-******* ***** *** not ** ********. *** *******, ***** ******* *** ** **** to ******* *** ** *** ***** *******, ******** ********* ****** as **** **** ************* **** *******.
  • **** *******: ** **** *****, ***** ******* *** **** ***** **** a *** ******** ********** *** **** ******** ** **** ***, but **** ** *** ******** ****** ** ****.

** **** *****, *** ***** ***** ****** *** *** ***** devices **** ****** **** *** ** **** ** *******. ** a ******, ******** ** *** *** ********** ***** ************ *** reconciling ******* *** ******** ***** ** ******** *** ***** ********** opening.

Three ***** ** *********

*****, ***** **** **** ** *** *** **** ********** ******* (e.g., ***.*** ** ***.***). ****, ****** *** **** ****** ***** max *** ********** ********. **** ******* ** *** ***** ***** consumption ***** ** *** ******* ***** ***** **** *** *******.

******** ********

** *** ***** ******* *****, **** **** ****** ***** ** available:

* **** ** ********** ** ******** ******** **************** ***.*** ***, *** ******* ******* * *** ** *** mA ** ***** *******. ** **** **********, **** **** **** *************** * *** ** ** ** ** *****, *** **** **** ************* *** ** ** * ********** **** ***** *** ********* and **** *****.

*** ***** ***** ******** ** *** ****** *** ****** ** 315 ** **** *** **********, ******** ** *** ** ********, which ** **** **** ******.

****** ********

*******, ** **** ****** ******* *****, ****** *** ************ ***** is *********.

* **** ** ********** ** ******** ******** **************** ***.*** ***, *** ******* ******* * *** ** *** mA ** ***** *******, ** **** **********,*** ***** ***** *******(*** * **** **/**** *** ***********) ******* * *** *** mA ****, *** ******* **** ***-* ************* *** ** ** * ********** **** ***** *** ********* and **** *****.

*** ***** ***** ******** ** *** ******* *** ****** ** 970 ** **** *** **********, ********* *** ********* ***** ** over *** ** ******* ** ******* ** ********** ********* *********.

Available ***** *****

***** *** ************* ***** ** *** ********** ** ********* *** much ***** ** *********. *** *******, ******* ********** **** ********** *** ********* ***** ******:

********* ** **** *****, *** ******* ********* ***** ***** *** particular ******* **** ** ****. *** *******, *** '******' ********** offers ** ** *** ** *** * ****** ***** **.*****, or ***** *.**.

*** '*** *******', ** ******** **** ******* ****-**** ***** ** control * ****, ****** *** ****** ****** ******* ******* *** output ******** *** ******* ** * ******. ***** **** ********** controller ****** ****** ** ** ** *** ********** *******, *** all *********** **. ******* **** *** *********** ****** ** ** limit **** **** ***** ** * ********** ****. ** **** cases, *** ********** ******** *** ***** ******* ****** *** ****** ports, *** ***** *********** ****** ****** * ********** *** ***** power ****** *** *** *****.

Max ***** ******

******* *** ***** ** *** ***** ***** ****** ****** ***** on ***** ****** ****. ********* **** ***** *** *** *****, overall ********* ***** ** **** **** **** ** ******** **** separate *** ******* ***** ********:

**** **** *** ***** ***** ********* **** *** (*.**) ** 33% **** **** ***** (**.**) *** **% **** **** ***** (28.8W).

Code ******

**** ********* ***** ***** *** ** ***** ***** ********, **** if ******** ***** ****** ****** ** *********. ******** ***** *** complicate ***** *** *** *****. ******* *** **** ****** ***** is ***** *** "******* ** ****' *********** **** ******* **** locks **** *******. *** **** ********** ****, *** ****.*.*.*.*(****) *******:

"* ****** ********* ****** (**** ******)***** ****** ** ****** ************ ** ***** ** *** **** *********** ** *** ****** ******* ****** ***********. **** *** **** ****** ** ********, *** ***** **** remain ******** *** ** ******* *******. *** **** ****** **** include ******* ******* “**** ** ****” *** **** ** ******* 40” ** **” ********** ***** *** ***** *** ****** *’ of *** *****. ***** ****** **** ** ******** ** *** push ******."

**** **** ********* ********* *********** **** ***** ** *** ** contact ******* ** *** **********, *** ******** * ****** ***** in **** ***** ******* ************. ** *** **** *****, * push ****** **** ** ********* ** ****** ******* * *** source *** * **** ****, *** **** **** ****** **** to '**** ***** **** ** ******', **** ** *** ****** source ** ** ** ***** '*********** ** *** ****** ******* system ***********'.

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

Cost ******* ***********

***** *** ** ***** ***** ***** **** ~$*** - $*** per ****, ***** *** *********** ** ***** *****, ***** ********, and *****. *** *******, *** ***** *********:

  • ***' ** **/* ***** *****: $**
  • ** **/***** ***** ******: $**
  • ************ ***** *** *****: $** - $***

******** ** ** ******* **** **** ** ~$*,***, **** ******* can ** ***** ***********.

Potential *** *** ****** ********

**** **** ******** *******, *** *** ******* *********** ****** **** separate ***** ******** ** ***. *** *******:

  • ***-**** ****** ****: **** *** ***** *******, ********** ***** ******** *** *** use, *** ********** ** ************ ******* *** ******* **** **** power, **** **** ****** *** ****** ***** *******. ***** *** is *** *** **** ***** ** ***** ******, ******* ***** PoE ***** ***** ******* **** ******** ********** *** *** **** sensitive ** ******* ****.
  • ********: ******* ******** ******* *********** **** ***** *** *** ********** high-power *****, **** *** *********** *** *** ***** **** ******** rated *** ********** ***. ************** ******** ******* ** ********* *** within ****** ******, *** *********** ******* ******** ** ****** ****** are ***. ******** ******* ******** ******** ******** **** *** **********, by *** ** ***, *** ******** ******.
  • ****** ***** *****: ** ********, ** *** ** ****, *** ****** *** subsequent ***** ** ******* ******* *** ** ***********. ** *** doors **** ******** **** ***** **** ***, **** ******** ****-************ backup ***** *** ** **** ******* **** * ******* ******** used ******* ****. ** **** *****, ******** *** ****** ******* PoE ******* **** ***** ******* ********* ******* ** *** ******* for ****** ***** **********, *** ********** ******** ***** ******** *** simpler *** **** ****** ** ******.
  • ******/******** *** ****** ***** ***** ******: * ****** ******** "**** ***** * ****** ******** ******, PoE ***** ** ****. **** ** ** * ****** ******, the ************* ** ****** **** ***** ****** *** *******. **** it ** ****** ******* ******, *** ******* *** ** *************** unlocking ** ******* *****." *** ******* ** ****** ** *** ****** ******* **** during ******** *******, *** **** **** *** *********** *** again **** *** ****** ****** *** ****** **** **. ** mitigate *** ****,*** *** ********** ** *******, ***** *** ~$*** *** ******* ** ****** the '***** ***' ***** * ****** ** *********** *******.

Quiz ********

**** ****** ******* ****** ******* ****.

[******: **** ******** *** ********** ********* ** **** *** ************* revised ** ****]

Comments (10)

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

** ** ****** ****** ** *** ** ********* ***** ***** PoE ** * ***** ******, ** *** *** *** (****** or *******) ** *** **** ** ********* ** *** **** standard (**********), ***** *** *** ***** *** ****** ****** ***-*********.

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

*******, ** *** ** ****** ** *** ********** *******, ******* notes, ** ****** *** ** *** ***** ******* **** *****.

****** ********* ******* *** *** ***** ********** ** ****** ***** for **** ***** ** ***** ****** *** **** ************* *****. (specially ** ** *** ********* *********). **** ***** ** ** difficult ** ******** ******** ** *** ******** ***** *** ***** as **** ******** **** **** *** * **** *** *** controller ******* ****** * **** ******** ****** ??

** ********* ******* **** ** *** *** ******* *** ***** (upto *** *** **** ***) ***** ***** **** *** ****** doors (****** ***** *** ****** *****).

******** ** ********* ******* *** ***** *** ****.

** *** **** **** *** ******** *** ******* *** ***** details ***** ***** **** **** ****** *****.

*****,

********* **** **** ** **** **** ** *** ****** ****** power.

** ****** ******* ******* **** **** ******* *** **** ******. i.e. *** ****** *** **** (**.** ** *** ***.*** ********)

***** ****** ***** ** *** ******= *** **** ****** ***** x **. ** **** ** ******

* **** ******* **** *** ******* *** *** *** *** recommending ******** ******** *** *** ** *** ******* *** ******* I'd **** * ***** **** **** ***** ** ****** ***, we ********* ***** ******* **** * ******* ***** ** ******* powered *** ** ** **** ********* (**** ***). ***** **** over * ******* ****** **** **** *** ********** **** ********* fine. * ***** ** **** ******* *** ********* **********, *** it's ****** ** ****** ** ***** ** **** ** *** power *********** ** *** ******* *****'* ****** *** ********* ******.

** *****,

** ***** ** ***+ ****** ***?

** ** *** ***** ***** ***** *********** ** ****** *** reader ********* **** **********.

*** **** ***** ****** ** ******* ******* ?

* ****** ***** ** ********* * ********* **** ** *** with ****** **** ****** ******** ** *******:

******* ***** ** *** ****** ** *** ************* ** *** powered ****** ******* ******. **** *** ** ********** **** * switch ******** ******, *** ***** ** ****. **** ** ** a ****** ******, *** ************* ** ****** **** ***** ****** the *******. **** ** ******** ******* ******, *** ******* *** ** *************** ********* ** locking *****.

* ******** ** ***** ** ****-**** *** **** ** ****** ** ****** **-*******.* ** **** ***** *** ****** ** *** ******, *** these **** ********** ***********.
**** *****, ********* ****** ******* ***** ****** ***** ******* ************* with ** ******. *** ******* ***** ** * *** ******* of *** **** ************ ****** ** ********** *** *****!

* ******* *** ******* ** *** *** *** ****** *** reference ** *** *******.

** *** **** *** ********** ** ********?

** **** * **** / ********** ** ***** ******* ****** up. * ******* ***** ******* **** **** ****, ** ***** results **** ******* **** ****.

* ****** ********* **** ** ***** * **** ******** ** his ********** ***** ****.

***** **** ** * **** **** *******, **** ** *** problems *********** **** **** ******** ** ****, ** ***** ****** for *** ** ****** *******. ** *** ** ** *********** power ****** *** ***** *** ****** ******* *** ***** ****** can ****** *** ******* ****** ********** **** *** ***** *** strikes. **** **** **** ******** **** ** ********* *** ** years.

...******** ** ****, ** ***** ****** *** *** ** ****** control...

****'* *** ******# ?

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