Door Position Switches (DPS) For Access Tutorial

By Brian Rhodes, Published Dec 16, 2020, 10:46am EST

Door position switches are frequently ignored or forgotten, yet can solve major access control problems.

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Access 'control' itself relies on these switches to make the right logical decisions about sending alarms and locking doors. In this note, we look at how to choose the right set of contacts for your door and cover these details:

  • Sensor Function
  • DPS Importance
  • Sensor Types Available
  • Doors Impact Selection
  • Common Sensor Types
  • Common Sensor Mount Locations
  • Sensor Pricing
  • Controller Connection Location
  • Mitigating Magnetic Tampering Risks

Door ******** ****** ******** ********

*** ****** *******, '**** position ********', **** ****** 'DPS', '**** ********', ** 'door *******', ****** ******* a **** ** ****** or ******.

********* *** ****** ******* system ********** ** **** interface ****** ** ***** this ****** ** *********. The ****** ** ******* is ******: **** * door ** ****, *** circuit ** ********. *******, when *** **** *****, the ******* ****** ****, signaling ** *** ****** system *** **** ** not ******. ***** ***** cannot ** ****** ** 'secured' **** ******, **** sensor ********* ***** * facility ** **** **********.

Security *********, *** ***** *******

****** ******* ******* *** blind ** ******* * door ** **** ** shut ******* ******** ********. Because **** ***** ****** limit ******** ** ******* unauthorized ****** **** ******** an ****, *** ** the ******* *** *** system '*****' ******* ** not * **** ** secure.

**** ********** ** *** install *** ** ***** to '**** *****' ** otherwise ******** *** ********, but **** ******** ** a ******** *******. ******* DPS, ****** ******* ****** be ******** '**********' ** all, *** ********** *** should ** * ********* aspect ** ***** *******.

Broad *********

******* **** ******** ******** are **** ** * variety ** *******, ***** are ********* ** ******* available. ***** ***** *********, there *** **** ** six ***** ***** **** in ********** ******:

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**** ************* *** '********' ****** types ** ***** ********* and ******** **** ********* sporadic ***** ****** *** system ******* **** *****. Like ***** ****** **********, choosing *** ***** **** position ****** ******* ************* on *** **** - which **** ** **** it **, *** ***** it ** ****, *** even ***** ********* ** faces. ** ******* ***** factors ** ****** *****.

The ******* *******

***** ** *****, ****** selection ** ********* ***** on ***********, **** **** are ********* ** ***. Some ***** ** *** switches *** **** ********* to ******* **** ****** depending ** *** **** itself.

*** *******, ** * door ***** ** ********* into * ***** ******** or ******* ****, ******** enough ********* *** ******* wire ** * "*******" frame ***** **** ** difficult. *******, * "********" door-mounted **** ****** ** field ********* **** **** glass ** ********* *****.

****** ***** ***** ***** may *** ****** ** drilled ** *** "********" types, ****** *********** **** doors:

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Mounting ********

*** **** ****** ** consider ** ***** *** sensor ****** ** *********. There *** * ****** of ******** ********* ** choose ****, ***** ** the ***** *****:

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*** **** ** ******* once ***** ********** **** location. ***** **** *** physical **** ** ****, how ** ** **** and ***** *** ******* play * *** ****, including:

  • ********/********:**** **** ** ************* conditions ** *** ****** exposed **? ** ***-*********** office, ** ** ******* exposed ** ******* *******?
  • ****/***/****:** *** ******* ** thresholds ****** *** **** fail, **** *** ****** be ******* ** ********, mud, ** *****?
  • ******* *******:*** ***** ** *** door ******? **** *** shift, ** * ******* times *** ****?

****** * ****** ** the **** *** ********* how ** ** **** help ****** *** **** sensor ****, ********** **** we ***** ** *** sections *****:

****etic '******' *****IPVM Image

**** **** ** ****** is *** **** ******, usually ********* *** ***** piece ** ** ********* into *** *****, *** the ***** '******' ***** being ********* **** * drilled **** ** *** door.

** **** *****, **** type ** ****** ** hung ** *** '*****' side *** ** ******** during ************ ** *********/********* is *********.

  • ****: ****** '******' ******* are ********* *** ************* accepted ** **** **********. Installation ** ****, ********* a ******* ** ******** and **** *** **********.
  • ****: **** ***** ** alignment ******. *** ********* range *** ** **** precise, **** ******* ******* to ** ********* *********** adjacent ** **** *****. Vulnerable ** ***** ******, especially ** ***** *** buffeted ** **** ** vibrations.

Plunger *****

IPVM Image* **********, *** ********, style ** ******. **** the **** ** ****, the **** ******* * button, ********** *** *******. When *** **** *****, the ****** ** ********, signaling ** ****. ******* plungers *** **********, **** are *** ******* ** false ****** ****** ** wind ** *********. ********* plunger ***** *** ********* on *** ***** ****.

  • ****: **** *******, ******* lasting ******** ** ******. A '***-*****' ****** **** avoids ********* ******.
  • ****: ***** ** ******** because ** ****/*****. **** to ****** ** ****** with * **** ** screwdriver ****** ********* ** frame *** **** *********.

Surface ***** *****

IPVM Image**** ** ******* ** most ***** ** *****: wood, ******** ******, *** hollow-core *****. ********* ******** are ******** ********* **** a ****** ****** ****.

  • ****: ****** *** ********* resistant ** ******** ************* effects (****/****/****/****). ******* ************ skill ********.
  • ****: ******* *** ******* to *********. *********** ************ in *************** ********* *****.

Recessed *****

IPVM Image* ***** ****-******* ******, very ****** ** **** frame ********** ***** ********. Generally, **** *** **** is *****, ***** ** run ****** *** ***** side.

  • ****: *** ***** ** the ********* *************** ** plunger *****, *** ***** concealed.
  • ****: ********* **** ********* and **** ********* ** install **** ******* ******. Risk ** ******** **** or *** ****** ***** clearance ***** ** ********** until ****** ** ******* them.

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

IPVM Image* ********* ****** ******** for ***** **** ******** 'up' ****** **** *****. Overhead/roll-up ***** *** ********* to ******* **** *********** sensors, *** ** **** and ******** ** ********** features.

  • ****: **** ** *******, and ********* ******** **** a *********** ******** *** armored ******* *** *****-**** use.
  • ****: ***** *********** ** false ****** *** ** wind *********. ********** ** dirt, *****, *** ******** damage.

Sensor *****

*** **** ** *** sensors ** ********* *****, with ************ ***** ******* higher **** *** ***** of *** ****** ******. Most ***** *** ********* for ***** $**, **** only '**** ********' ** ruggedized ****** ***** **** expensive.

System ********** ********

**** ******** ******** *** connected ** ********* ******* **** ***************** ** *** *** of ******** ************ ******* for '***', ** ** the **** ** *** controllers *****, ** ******* inputs **** *** ********** for *** *** ** configuration *******:

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*******, ***** ****** *** simple '******** ******' ********, and ***** ***** ** typically *** ****** ** the ********** *** *** use.

Sensor **** ********* *****

***** ** *** **** type *** ************ ********, guidelines *** ****** **** selection ***:

  • ********* *****:*** ******* ** ******** Magnetic ******, ********* ** the '************' ***** ****.
  • ***** *****/**** ******:*** ******* ***** ** Recessed ****** ********* ** frame ********* *** **** frame ******** ****.
  • ******/********:*** ******* ** ******* Mount ******, ******* *** weather ** *** ******* an ******** ***** ************ ***** the **** ****.

Common *********

***** *** *** ******* trouble, *******. **** ****** to ******** ********* *********** issues ** ****** ******** them **** *******, *******, most *************' ******* *** best ********* ********* ***** use. ** *******, **** a ****** ******* * source ** ***** ******, one ** *** ********* situations ** *** *******:

*****/****** ********:******** ** ********** ******* are ****** ** ******, dirt, ** ***** *** so **** ****** ******** break *******. * ****** rag *** ***** ******* wipe *** *** *** problem, *** ********* ******** may ******* ******** ***********.

************:***** *** ****** **** over ****, ******* ****** use. ********* *** **** shifts ****** **** ********** the **** ** ********** up *** ****** *** be ********.

******* ******:******* ******** *** ***** magnets ** ****** **** sensitive **** ****, *** greater ****** ** ******* corrosion ** **** ************ can *********** *** ****** life. ************ *** ** required **** ********** ** exposed ***** **** ******.

Magnetic ********* ****

***-********** ******* ********* *** magnets ** ***** ****/***** state. ******* ** **** magnetic ***********, **** ******* make ** ******** ** 'fool' *** ****** **** staying ** * '****** state' ** * **** powerful, ******** ****** ** placed ******** ** *** sensor, **** *** ******* recessed **** ******.

****-******** ******* ******************* ** **** ** place ** ******** *** to ****** ** ******* against *** *******, ** using**** ****** ***************** *** ***** **** magnetic ******* ********, ******** those ******* ********* **** 30% - **% **** than ************ *******.

[****: **** ****** **** 2018 *** **** ************* updated ** ****.]

Comments (16)

***** ****** *****. ******* important ***** ** *** magnetic ***'* ** *** actual ******. *** ******** on ****** ***** ***** with *** ******* ** top ** *** ****. Often ***** *********** ***** place *** "*******" ****** in *** ******* *** not ****** ** **** glue ** *******. **** time *** ******* ******* and **** *** ****** moves. ******* ********** * customer **** **** ******* their **** *** *** being **** ** **** the ****, **** ****** they *** ** ****** granted ******* *** ****** thinks *** **** ** already **** *** ******* of *********** ******** *** door **-***** ***********.

**** *** **** ** the *** *******/**/********** ******* we **** ******* ***** Nascom *******. **** ********* than ****** *** ******* a **** *******. ***** "Shark" ****** ** *** ultimate *********** *** *** Squishy ****** *** *** don't **** ** ***** about ** ****** **** time.

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*'** ***** ***** ** those '*******' *****, *** what *** ******* ***** (terrible!) *****. ******!

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***** * ********** ***** with **** *******, **** customers *** ***** "****** control" ** * ******* entry ******, ******* ****. They ***'* **** ***** door ******** ** *** motion. ***** ** ****** run * **** *** of ******, ***** * composite ***** ** *********, seldom ** ** ******* any ******** **** ** not ***** ****. **** applications *** ****** ** avoid ******* *** ***** keys. ***** *** *********** product *** ************ ** the ***** ** *** customer *** ***********.

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********* ********* ***’* **** what **** **** ***** all ********* *** *********. Of ******, ****’* **** many ***’* ******* **********.

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** *** **** **** position ** * ******** of ********** ******* **** the **** ******** ****** should ** ********** **** the ******* ******, ** it ** ******** ****** or * *** **** or ********. ***** ******* door ********** ******* *** show **** *** **** is *** **** '******' as * **** ****** does, *** **** **** typically **** *** **** lock ** *******.

**** ********* ******** ******* have * *******, *** that ***** *** ****** is ******* ** *** strike & *** **** shows *** ****** ** in *** ****** ********.

*** ***** ***** **** a **** ***** ****** which **** ******** **** the **** ** ********* & *** ******** ***** is ******** ******** ******* the ****, ** **** is ******** ***** **** closed.

*** ******* ***** ***** rate ** ********* *** / ****, * **** BS ** **** *** fitted *********. *** ******* location *** ***** ** approx */* ** */* of *** *** ******* the ***** **** ** the **** **** *** strike ****. ****** ****** 100s ** *** ***** of ***** ** **** way * *** ******** say **** ***** ***** rate *** ** **** movement *** ** **** or ****** *******.

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* ** ****** **** to *** **** *******. It *** **** ** contention *** ****** *** that *** ******** *****'* pay ****** ********* ** the ***** ***** **** door ********.

** ** ***** *** granted **** **** *** needed *** **** ** installed *** ** *** ever **** ** ********* the ******** ** ********* of ****.

***** ** ****** **** improvements ** *** **** operate. ** *** ******* in *** **** *****, you *** ********* ** contacts ******* **** *** regulated. ***, *** ***** other ******** ***** *** rarely ************ ** ******** other **** ** **** one.

*********** ****** * ********* technology. **** ***'* *** reed ********, *** *** balanced ******** ********. * don't **** ** *** other ******* **** *** tried ***/** ********* ** coming ** **** * better ******* ** * different **********. * ***** be ********** ** **** from ****** ** ***** options. **** **** ***** more **** **** **** security ********, **** ***** standard ******** ** ******* mount ******** ** ****.

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*** ********** ******...*** *** of **** **** ******** switches. *** ******** ******* for *** ****** ******* system *** *** *** the ********* ******. ******* the ****** ** ******* on *** **** *** and **** *** ***** of *** ****** *** being ** *** ******* swing *** ** *** door.

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***** ****** ** *****. Have *** **** ******** the ******** ***** *** biased ****? * ******** use, ******** ********, ****** magnetic ******** ******** ** the **** *****. ***** normally *** ** "*****" the ******* ****** **** a ******** ****** *** having * ****** ******** makes ** **** ********* if *** ********* **********. The ****** * **** recommend ****** ****** ******* on * **** ******** installation **** ********* *******.

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Funny

**** ********* **** ** see *** ***** ** using * *** ** a ***-**** ****** "**** only" ****. *****-**** ********* like ** *** ***** of * ****** ** office ******** ****** **** every **** *********, *** just *** **** **** card *******. * ****** find ******, ******, ** other ************ **** ********* that **** ***** ****.

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Funny: 1

** * ******* ****** project ** ***** **** 6 ***** **** *** access ******* *** *** more **** **** *** DPS ***** *** ** a ***** ***** . Old ****** *** ********* a ***** ** ***** it *** *** ***** and ** ******.

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******** ******. ** ***** the ******** ************ **** is *** ****** ***........******'* be ** ****** ******* issue ** ** ****'* ;-)

** ****** '*****' ** a **** **** ******* for **** ***** *****.

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*** ******* ***** ****** Brian!

**** = *****

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Disagree: 1
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***** ** **** ******** on *** ******* ** your ****, ****, ****** or ******* **** ***** is ** **** ******* of ******* ***** ** the *********** ****** ********.

*****: **** ******, ** grows ** *** **** subs *****/*******/********** *** ********* of **** ******.

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Unhelpful: 1
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**** ****** ** ***** to ** **** *******?

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** *** **** ****** control *** ***’* **** a **** ************* ** the *** *** **** Status ********** *** ********, learn ****.

**** ********** *** *** percentage ** *** ***** willing ** **** *** additional **** ** ********* them.

****, ****’* **** ** experience ** *****.

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