Drain Wire For Access Control Reader Tutorial

By: Brian Rhodes, Published on Sep 04, 2018

An easy-to-miss cabling specification plays a key role in access control, yet it is commonly ignored. The drain wire offers protection for readers and controllers, ensuring proper cable performance.

We examine the drain wire, the role it plays, and why it should not be ignored.

This tutorial covers:

  • Why the drain wire is needed
  • How to identify the drain wire
  • Why access readers make them mandatory
  • Why only one end is connected
  • How much drain wires typically cost

Drain Wire Purpose

The data exchange between reader and controller can be corrupted, subject to environmental interference from other sources or even building materials like steel studs and door frames.

Given that reader wire typically is run to devices installed outside buildings, but connected to controllers deep inside them, the length of cable connecting them can attract and trap potentially degrading electrical/ EM interference that corrupts analog Wiegand or RS-485 signals between devices.

Unless the conduit between reader and controller, or controller to head end is shielded, low-level problems are difficult to diagnose and troubles can result.

** ****-**-**** ******* ************* plays * *** **** in ****** *******, *** it ** ******** *******. The ***** **** ****** protection *** ******* *** controllers, ******** ****** ***** performance.

** ******* *** ***** wire, *** **** ** plays, *** *** ** should *** ** *******.

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

  • *** *** ***** **** is ******
  • *** ** ******** *** drain ****
  • *** ****** ******* **** them *********
  • *** **** *** *** is *********
  • *** **** ***** ***** typically ****

Drain **** *******

*** **** ******** ******* reader *** ********** *** be *********, ******* ** environmental ************ **** ***** sources ** **** ******** materials **** ***** ***** and **** ******.

***** **** ****** **** typically ** *** ** devices ********* ******* *********, but ********* ** *********** deep ****** ****, *** length ** ***** ********** them *** ******* *** trap *********** ********* **********/ EM ************ **** ******** analog ******* ** **-*** signals ******* *******.

****** *** ******* ******* reader *** **********, ** controller ** **** *** ** shielded, ***-***** ******** *** difficult ** ******** *** troubles *** ******.

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

OSDP *** ** ***** *****

*** **** ****** **** by *** ****** *** controller ******* *** ***** wire's **********. *** ****** Wiegand ** **-*** ******, the ***** **** ** critical. ** ** **** important *** ******* ****.

****'* ******* ****** ** more ******** ** *** interference **** *** **** Wiegand **********. *******, ******* most **** ******* *** function ** ******* ** RS-485 ***** ** ****, installation ************ ***** ******* using * ***** **** drain **** ** ****.

*** **** ******** ** readers ********* *** *******, but ** ******* ******** of **** *********, *** mandated *** ** *** drain *** ****** **** important.

Identifying ***** ****

*** ***** **** ** an ********** ******-*** ********* that ** ******* ** jacketed *******. ** *** image *****, *** ***** wire ** ********* ** it ********* ** ******** in *** *******.

*********** *** ***** **** provides * ********** ****** to ****** ***** *********, although *** **** ****** provides ********** **** ***** Frequency ************ (***) *** helps ****** *** ******** from *** *****.

********* Alone *** ********

*** ***** **** ** installed ********* ** *** ******. ***********, *** **** ** 'groundable' ** * ***** tap, *** ******** ***** runs *** *** ****** installed **** **** * shielded **** ****** ** available.

** **** *****, *** cable ***** **** ******* a ***** **** *** the ******* ** ********* the ****** ******.  *** even *** ***-******** *****, a ***** **** ***** may ** ********* ** order ** ****** *** cable.  

Specified **********

***** ***** **** ** specified ********** **** ******** supplies ** **** *** not ****** ******** ** standard *******. **** ** one ****** ****** *******, drain ***** *** *** always ******** (*** *** ******: *** ** *** *** Surveillance).

Access ******* ********* ******* *****

***** * '**** *****' specification, ***** ***** *** typically ******** ** *** devices **** **** *******, door ***********, *** ***** devices ***** **** ** exchanged. * ***** **** is ******** ******** ** the ******* ******** ** readers, *** *** *** of **** **** ** required ** ************:

reader drain wire

******* *** ********** ** not ****** ***********, ***** wire ************** *** ******** overlooked. ** * ******, when ***** ********* ** specified, ** ********** ** installed **********. *** ****** presence ** * **** jacket ** ***** ****** a ****** **** *** shield *** ***** ******* all ************ ****** ** is ******** ********.

One **** *** *********

*** **** ****** ******** asked **** ******* **** the ***** **** ** "Which *** ** *** wire ** ********, ** are **** **** *********?"

***** *************, ***** ** no ********** ******. *****, we **** ******* ******** from ************ *******, **** some ************* **** ******** instruction ******* ******:

drain attachment instructions vary

*** ******** ***** ********** a ****** ** *******:

  • *** #*: ********** *** ***** wire ** **** **** of *** ***
  • **** #* & *** #*: ********* ** *** reader
  • ****** #*: ********* ** *** controller
  • **** #*: *********** ***** ****, just **** ***** ****** be ********

** ***** ** ** effective, *** ***** ****** be ******** ** *** end ** ***** ********* effects ** '*****' **** from *** *********. *** more ** ********** *********, see ********* *** ******* *** Video ************.

*******, *** *** ************ call *** *** *** to ** **** ** ground. ******, **** ******* are ******** **** ******** connectors ** *** ***** or ** *** ******'* pigtail *** ******** **** ends ** ** *********.

Added ***** ****

**** ***** ** *******, including ***** **** **** a ****** ****. ********* on *** ************ ****** specification, *** ***** ********* between **% ** **% per **** ****** **********/** drain **** ********. *** door, **** ********* **** about $** ** *** cabling *****.

***** *** *** **** involved, *** ********* ** installing *** ***** **** to **** *** ****** in ******* ****-**** ***** in ****** *************** *** unreliable *******.

Comments (0)

Login to read this IPVM report.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

Related Reports

Open Access Controller Guide (Axis, HID, Isonas, Mercury) on Sep 19, 2019
In the access control market, there are many software platforms, but only a few companies that make non-proprietary door controllers. Recently,...
Directory of 68 Video Surveillance Startups on Sep 18, 2019
This directory provides a list of video surveillance startups to help you see and research what companies are new or not yet broadly known. 2019...
Fingerprints for Access Control Guide on Sep 09, 2019
Users can lose badges, but they never misplace a finger, right? The most common biometric used in access are fingerprints, and it has become one...
Assa Acquires LifeSafety Power on Sep 04, 2019
Assa Abloy is acquiring LifeSafety Power, adding to their growing collection of access control brands like Mercury, August, Pioneer Doors, and...
Register Now - October 2019 IP Networking Course on Aug 28, 2019
Register now for the Fall 2019 IP Networking Course. This is the only networking course designed specifically for video surveillance...
Mobile Access Control Guide on Aug 28, 2019
One of the biggest trends in access for the last few years has been the marriage of mobile phones and access cards. But how does this...
ZK Teco Atlas Access Control Tested on Aug 20, 2019
Who needs access specialists? China-based ZKTeco claims its newest access panel 'makes it very easy for anyone to learn and install access control...
Suprema Biometric Mass Leak Examined on Aug 19, 2019
While Suprema is rarely discussed even within the physical security market, the South Korean biometrics manufacturer made global news this past...
Biometrics Usage Statistics 2019 on Aug 13, 2019
Biometrics are commonly used in phones, but how frequently are they used for access? 150+ integrators told us how often they use biometrics,...
ProdataKey (PDK) Access Company Profile on Aug 09, 2019
Utah based ProdataKey touts low cost cloud access, wireless controllers, and no dealer required national distribution availability. But how does...

Most Recent Industry Reports

ONVIF Suspends Huawei on Sep 20, 2019
Huawei has been 'suspended', and effectively expelled, from ONVIF so long as US sanctions remain on the mega Chinese manufacturer. Inside this...
Open Access Controller Guide (Axis, HID, Isonas, Mercury) on Sep 19, 2019
In the access control market, there are many software platforms, but only a few companies that make non-proprietary door controllers. Recently,...
Axis Perimeter Defender Improves, Yet Worse Than Dahua and Wyze on Sep 19, 2019
While Axis Perimeter Defender analytics improved from our 2018 testing, the market has improved much faster, with much less expensive offerings...
Directory of 68 Video Surveillance Startups on Sep 18, 2019
This directory provides a list of video surveillance startups to help you see and research what companies are new or not yet broadly known. 2019...
Uniview Prime Series 4K Camera Tested on Sep 18, 2019
Is the new Uniview 'Prime' better than the more expensive existing Uniview 'Pro'? In August, IPVM tested Uniview 4K 'Pro' but members advocated...
US Army Base To Buy Banned Honeywell Surveillance on Sep 17, 2019
The U.S. Army's Fort Gordon, home to their Cyber Center of Excellence, has issued a solicitation to purchase Honeywell products that are US...
Vivotek "Neural Network-Powered Detection Engine" Analytics Tested on Sep 17, 2019
Vivotek has released "a neural network-powered detection engine", named Smart Motion Detection, claiming that "swaying vegetation, vehicles passing...
Schmode is Back, Aims To Turn Boulder AI Into Giant on Sep 16, 2019
One of the most influential and controversial executives in the past decade is back. Bryan Schmode ascended and drove the hypergrowth of Avigilon...
Manufacturers Unhappy With Weak ASIS GSX 2019 And 2020 Shift on Sep 16, 2019
Manufacturers were generally unhappy with ASIS GSX, both for weak 2019 booth traffic and a scheduling shift for the 2020 show, according to a new...