Inputs/Outputs For Video Surveillance Guide

By: IPVM Team, Published on Aug 24, 2018

While many cameras have Input/Output (I/O) ports, few are actually used and most designers do not even consider them. However, a good understanding of their flexibility can save hundreds of dollars on complex designs.

In this guide, we explain camera I/O and how it can be used to integrate devices and functions not supported out of the box in surveillance. Inside, we cover:

  • Input/output basics
  • I/O styles (on board vs. whip vs. removable)
  • I/O equipment: Cameras, modules, recorders
  • Common applications for inputs
  • Common applications for outputs
  • Form factor differences
  • VMS integration issues
  • ONVIF support issues
  • Camera capabilities vary widely
  • VMS multi-camera I/O integration
  • VMS support variance
  • I/O troubleshooting drawbacks

***** **** ******* **** Input/Output (*/*) *****, *** are ******** **** *** most ********* ** *** even ******** ****. *******, a **** ************* ** their *********** *** **** hundreds ** ******* ** complex *******.

** **** *****, ** explain ****** */* *** how ** *** ** used ** ********* ******* and ********* *** ********* out ** *** *** in ************. ******, ** cover:

  • *****/****** ******
  • */* ****** (** ***** vs. **** **. *********)
  • */* *********: *******, *******, recorders
  • ****** ************ *** ******
  • ****** ************ *** *******
  • **** ****** ***********
  • *** *********** ******
  • ***** ******* ******
  • ****** ************ **** ******
  • *** *****-****** */* ***********
  • *** ******* ********
  • */* *************** *********

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

Input *** ****** ******

****** ***, ****** *** outputs ****** ** ******* very *** ******* ** current ** ******* ** send ******* ******* (**** and ******). ******* ******* from * ****** (**** as * ********* ** PIR)** ** ************* ******* ** *** device, ***** ****** ** the ****** (*********, ***, or *******) *** ******* voltage ** ** **** **** ** ****** ** * ********* ****** such ** * ***** or ********* ********* ******.

*********, ***** ******* *** triggered ***** **** ********** of ***** ** *-** VDC. **** ****** *** use ****** ******** *** wattages ***** *** ******** able ** ***** **** peripheral ******* (**** ** PIR ****** *******), *** these *** ********. 

I/O *********

****** *** ******* ********* fall **** *** ** three ******:

  • ******** ** ******:*****, **** ******* ***** I/O ******** ** *** camera ******, **** ** the ****** **** ** this *** ****** *****. This ********* ** ****** on ****** **** **** dome/bullet ******* ***** **** space *** ***** ***********, but **** ****** ** compact ******.

  • ****** **** ****** ****:******, ******* ******* **** commonly ***** */* ** the ***** ****, ***** the ******** ** *** camera *** *** ** accessible ** ******** ** rating.

  • ********/********* ****:*******, ****** **** **** an ******** **** **** may ** ********* ** needed, ** ****** *** installed *** ** ***. This ****** ** ********** to **** ********** ******* of ****** *****, ***** I/O ** *** **** in **** ******** *** may ****** ** ******* for ****** ***** **********.

Other */* *******

** ******** ** *******, inputs *** ******* *** also ** ***** ** NVRs *** ****, ** well ********* ******* */* modules, ******* ***** ****** similarly ** ******* ** VMSes, *** ******* **** I/O *** ** *****.

***** ********** ******* *** typically **** **** **** cameras ** *** ******* I/O, ***** ******* *** more ****** ** ** mounted ***** ** *** device **** *** ********** or ***** ********* **. However, **** *** **** be **** **** *********** connection ** *********, **** as * ****** ** inputs *** ******* *********** an ********* ****, * common ******** */* ***********.

Input ************

***** *** ******* ****** applications *** ***** ****** in ************ *******, ******* from ****** ** *******.

**** ** *** **** common *******:

  • ********* ******* ** ***** recording:**** ********, ***** *** attach *** ****** ********* or **** ******** ** camera ****** ** ***** to ******* ********* ** event. ***** ********* **** provide * **** ******** detection ****** **** ***** video ****** ********* ** analytics, *** *** **** be ********** ********** ** logged ** *** ********, in ***** ** **** entries ** * ******** area ****** ** ****, for *******.
  • ********** ** ****** ***/***** status:**** ************* *** *** photocells ** ******* ***/***** switching ******* ** *** camera ************* ********* ***** on ***** *****. **** is ****** **** ***** IR ************ ** **** the ****** *** *********** are ************, *** *** also ** **** ** some ***** ***** ******* switch ***********, **** ** shaded ***** ***** ****** too ***** ** *** day.
  • *******/******** ** ******* ******:*******, ***** *** ******* buttons ** ******** ***** drive ******** ****** ** the ******, **** ** increasing ********* *** ******* emails **** * ***** button ** ******.

*** *** **** * few ******** ** ***** applications. *********** ******** **** can ******* * ******* closure *** ** **** to ***** ******.

Output ************

***** *** ******* ****** applications *** *******, ** well:

  • ****/**** *******:******* *** ******** ********* to ****** ******* ******* to ******* **** ******* for ******** ** ** open *****. ***** *** camera ** ******* **** these ******** *** ******* allows ****** ******* *** its *** ********* ** via *** ***, ** is ***** **** **** effective ** ******* ******* via ****** *******.
  • ******/********:******, ******* *** ** used ** ******* ****** or ******** ** *****, to **** ***** ********* to ******** ******* ** notify ****** *** *** not ** ******** *** camera's ***** ****. ***** may **** ******* ******* announcers ** **** ******** messages ** *****, **** as ******* ********* **** they **** **** ******** using ***** *********.
  • ********* ***********:*******, ****** ******* *** be **** ** ******* zones ** ** ********* detection ****** ** *********, such ** ***** *********, in ***** ** ******* a ****** *********** *** central ******* ********** ***** direct ** *********** ** not *********.

Camera **** ****** ***********

************ ** */* *****, but *** ******, ******* on **** ****** **** factor ** ****. *** ******* most ***** ******* */*, regardless ** ****, ***** domes *** ******* **** depending ** *** ************ and ******.

***** ****, ******* ******* frequently ** *** ******* I/O, ***** ****** *** models **. *** *******, Axis *** ****** ***** include ** ****** ** outputs, ***** * ****** models ******* ********. *******, some *** **** *****/*********** series ********* ******* ******* I/O, ***** ****** ** not. ******* ** ****, I/O ******* ****** ****** be ********* **** *** manufacturer.

************, *** **** ****** Finder *** **** **** various ****** **** */*, such **:

VMS *********** ******

**** **** **** ******* a ****** ******** */* does *** **** ***** should ****** ***** ****** VMS ********** **. ***** often ********* ******** **** as *********, *************, *** motion ********* ******* *********** I/O ******* ** ** a **** ********** **** feature.

*/* ******* *** ********* be ***** ** *** VMS' ********* ******* ****, and **** ** ****** criteria ** ****** ** selecting ******** *************' ********* models. *** *******, ***** denotes */* ******* ** their ********* ******* ****:

*** ** ***** ** see ******** ************, ***** must ***** ***** ******** test *******, ***** ***** the ****** ** */* supported:

ONVIF */* *******

*/* ******* ** ******** via *****, *** **** commonly ******** **** ** direct ****** *******.***** ******* ********* **** ****** ******* be *********, *** *** inputs, ***** *** ** optional *******. ******* ** this, **** ******* * cameras' */* *** *** fully **********. *** *************** * *** ****** ****, *** is *** ******** ** be ******* ***** ****.

Camera ************* ******

******* **** ****** */* can ** **** *** varies **** ************ ** manufacturer *** **** ****** to ******. *** *******, Hikvision ****** ****** *********** allow ***** ** ******* a ***** (***-******* *****), send *****, ****** ** SD, *** ******* *** alarm ******.

*******, ******, **** ** the **** ****** ***** below, ***** *** **** actions ** ***** ******, such ** ******** ******* text, ********* ***/***** ****, sending**** ******* *** *************, *** switching ******* ******** ***** (WDR, *****, ***.).

VMS ************ ****

*********** */* **** ***** opens ** **** ******* actions **** ***** ******* alone, ***** ******** *******' inputs *** ******* *** be **** ********. *** example, **** ***** ***** the ***** ** *** camera ** ******* *** output ** *******, ***** below. **** ***** ***** a **** ** ******* a ********* ****** *** door ******* **** * reception **** ********* ** one ******, ***** ******** the ****** ** ******* camera **** ************ ******* near *** **** ** related ****** ******, ************* reducing ***** ************ **** compared ** * *******.

****** *** **** ** used ** ****** ******* VMS **********, **** ** changing **** ******* ** recording ***** ****, ******* audio ********* **/***, ********** cameras ** *******, ***.

*******, ***** ************ **** quite ************* **** *** to ***, *** ********* found ** *** *** not ** ******** ** another. ***** ****** ****** test ***** ******* ************* before ******** ** ** available.

I/O *************** *********

***** */* ** ******* devices ***** *** ********* of *********** ********** **** back **** *** ********. Instead ** *************** ************ supported ************, *** ********** is *************** * "***-***" custom ********. **** * feature **** *** ******** as ******** ** ***** working, *** ********** ** often ** ***** *** during *************** ***** ***********. Because ** ****, */* is ********* **** *** smaller *************. ***** ***** quantities ** *********** ******* devices ** *******, ***/*** software *********** ** **** often *********, ********** ***** supported ** *** ************(*).

Comments (5)

 

**** **** **** **** models ******** **** *** contacts, ***** ** **** are ******* ******* *** voltage ******. **** ***** Axis ******* **** *** closed ******* ****** *** 12v *******. ** **** of *** ***** ******* limitations. **'* ******** ** have * ****** ***** that's ******* *** * 5v ******, *** ***. 

 

**** *** **** **** play ***** * ****** was ***** *** ** on ** **** ******. The ***** *** ****** from * *** ******* relay ** * **** break ****** *** *** output *** ***, ***** triggered * **** ** drop. **** ****** *** only ******* ** ********* about ***** ** * recall *********. 

 

******* *** ******'* **** sheet **** **** *** if **'* * *** level ****** ** * dry *******.

 

 

**** **** **** **** models ******** **** *** contacts, ***** ** **** are ******* ******* *** voltage ******.  **** ***** Axis ******* **** *** closed ******* ******...

****’* * ******’* */* inputs ****** ***?

**** ** *** ******* are *** *** *** typically **** **** **** type ** *** ******* relay ** *** **** on *** ****** ** more **** *** **. So ** *** ****** say * ****** **** has * **** ** 250mA *** **** **** like **** *** *** internal *****. ***** *** some ** *** ***** cameras *** **** *** outputs. *** **** ********** here ** ** **** sure, "* ** *** last ****** ** *** Read *** ***** ******" but *** **** ** is *********. * **** to **** ** * speaker ** **** ******* and **** ***** ****** zones ** ******** *** output *** **** *** speaker **** *** ** the ***-******** ********. *** best *** *** * camera **** ****** ** a ******** *** **** the ********* **** ** they ***** **** *** dog ****. ****** **** at ***** *** ********** they ***** ****** ** out. ** ****** *** with ** ******** **** task ** ****** ******. See *****. **** ** for ** **** ******.

 

* **** *** ***** from **** ***** ** send * ***** ***** wen ** ***** ** down ** *** 

**** ******* ****!

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