Drain Wire For Access Control Reader Tutorial

By Brian Rhodes, Published on Sep 23, 2020

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.

IPVM Image

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.

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

*** **** ****** **** by *** ****** *** the ********** ******* *** drain ****'* **********. *** analog ******* ** **-*** serial, *** ***** **** is ********. ** ** less ********* *** ******* OSDP.

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

*** **** ******** ** readers ********* *** *******, but ** *** ******* adoption ** **** *********, the ******** *** ** the ***** *** ****** less *********.

Identifying ***** ****

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

IPVM Image

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

Shielding Is *** *********

*** ***** **** ** installed ********* ** *********. ***********, *** **** is '**********' ** * screw ***, *** ******** cable **** *** *** easily ********* **** **** a ******** **** ****** is *********.

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

*** **** ** *********, check ***:********* *** ******* *** Video ********************.

Specified **********

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

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

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

IPVM Image

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

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

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

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

IPVM Image

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

  • *** #*: ********** *** ***** wire ** **** **** of *** ***
  • **** #* & *** #4: ********* ** *** reader
  • ****** #*: ********* ** *** controller
  • **** #*: *********** ***** ****, just **** ***** ****** be ********

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

*******, *** *** ************ call *** *** *** to ** **** ** the ******. ******, **** devices *** ******** **** grounded ********** ** *** board ** ** *** device's ******* *** ******** both **** ** ** connected.

Added ***** ****

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

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

Comments (9)

***! *** ********* ** the ***** **** ********** has **** ***** ** for **+ *****. * was ****** ** ****** at *** ***** *** float ** *** ******. Yet *****, *** ********** is ***** *************. * find ** **** ** believe **** ******* ** not ********** ********* (** pun ********).

******* *** **** ******** you *** ***** ** hooking **** ***** **** up ** * ******** grounded ******... * ***'* tell *** *** **** intermittent ** **** *******, keypads, ***. * ***** by ********** **** ****** wire.

* ****** ****** ** the *****, ******* *** in *** ***** ** was ******* ****** ** find * **** ******** to ****** ** **** was ***** **.

**** ****** **** * experience ***** * ******* drain **** ** ******** damage ** ******** ******* IP **** **** *** prone ** ****** ********* strikes? ** ** **** not *** ****** ******** for ** *******.

**** *** **** ** more ****** * *****/*** problem **** * ***'* believe * ***** **** will ***. *** ***** protection ** **** **** and *** ** **** helps. ** ******** **** getting ***** ** **** facility? ** ** **** PTZ's *** ** * parking ***? ** ** just *** ** * time ** **** ** take *** *** ****** and **** ***** ******* too?

******!

****** *** **** ****. No ***** **** *** damaged, **** * *** PTZs *** *** ********* didn't *** *** ******** they **** **, *** nearby.

*** ***** **** ***/** 61000-4-2 *** *****, *** it **** ***** ******* the *** *-****** *** damaged **.

** *** ********* ************ using ********* **** ***** for ********* **** *** a *** ** ************ activity?

***** ***** ********** - DTK-MRJPOEX

********, *** ***** *** to ** *** ***** on *****, **** ** have ****** **** ** the **** ** ******* the ***** ** *** pole *** ***** ** be *****, *** *** surge *********** ******* **** more ******* ********** ****** on *** ******. ******** I **** **** ***** suppressors ** **** ****, you **** **** ** ensure ****** ********* ** the ****** ****. ***** brings ** ** ** next *****, ** **** current **** ***** ******** properly? *** * ***** suppressor ** ****, ****** built ** ** *********, you **** **** ***** properly ********, *** **** that ***** ********** ** reroute **** ***** **** from *** ***********, *** to * ******.

**** ** *** ***** but **** **** * understand ***** ********* *** grounding *** **** ****** would ** ********* ** the ********** ****.

** ******* ** **** if *** ****** ** two ********* ********* *** introduce *** **** ** voltage ********* ***** ********** through ********** **** *** shield ***** ***** **** the **** ** *********** interference **** *** **** link ******* *** ********** and ******.

** ** *** ****** only ** *** **********, introducing ***** ** *** form ** ******* ********* would ** * ***-***** as ***** ***'* * circuit ******* **** **** one *** ** ******** and *** ******** *** is ********. *** *** type ** ************ ***** want ** ****** ****** ground ********* *** * float.

********* *** ***** ** both **** ***** ****** introduce * ******* ********* as **** **** ***** likely ** ******** ** 2 ****** ********* ********* and ********* ***** **** shield ******* *** *** ends ** *** ***** by ***** ** **********. In **** ******** ***** is * ******* ******* from *** *** ** the ***** **** ** the ******** *** *** then **** ****** *** back ** *** ***** end. **** ******* * path *** ******* ******* or *** ** **** through *** ******* ****** than * ***** ** ground.

*** ******* ** *** only ****** *** ***** at *** ****** **** could ** ********** ****** having ******* ** ********* locations ** **** *** cause ******* ******* **** can *** ** ******** noise. ** ****** ******* at * ***** ** different ********* ** **** practice. *** ** ***** there ** ** ****** link ******* *** *** ends ****** * **** for ***** ** ****.

** ** *** *** the ***** ** **** sure ** ** **** all *** ****** ***** the **** ****** ******** and *** ********* ** each ***** ** **** than *** ***** ******. And **** ******* ** the ******** ***** *** of *** ****** ****. Therefore ** ***** *** same ****** ******* *** drains, ******* *** ***********, any ******* ******* ** simply ******* ** ****** and **** *** ****** a ******* ******* *** ground (*********).

** ** *** *** logic ** * ****** loop **** ********, ** the **** ** ** give *** ****** *** best ****** ** ******** noise *** *********** **.

** ******* ***** ****** please ***** **. **** is **** *** *** I ********** ******.

***** **** ** **** important *** ********* ** carry **** ******.

**********... * ******* ******* caused ******* *** ************. must ** *** ******?

Read this IPVM report for free.

This article is part of IPVM's 6,592 reports, 889 tests and is only available to members. To get a one-time preview of our work, enter your work email to access the full article.

Already a member? Login here | Join now

Related Reports

Exit Devices For Access Control Tutorial on Aug 25, 2020
Exit Devices, also called 'Panic Bars' or 'Crash Bars' are required by safety...
Forced Door Alarms For Access Control Tutorial on Aug 17, 2020
One of the most important access control alarms is also often ignored....
Access Control Levels and Schedules Tutorial on Sep 29, 2020
Configuring access levels and setting up schedules is central to maintaining...
Keypads For Access Control Tutorial on Jul 28, 2020
Keypad readers present huge risks to even the best access systems. If...
AHJ / Authority Having Jurisdiction Tutorial on Aug 06, 2020
One of the most powerful yet often underappreciated characters in all...
Door Fundamentals For Access Control Guide on Aug 24, 2020
Doors vary greatly in how difficult and costly it is to add electronic access...
Ubiquiti Access Control Tested on Oct 21, 2020
Ubiquiti has become one of the most widely used wireless and switch providers...
Access Control and Video Integration Statistics 2020 on Oct 08, 2020
Video Surveillance and Access Control are two of the most common security...
The Insecure Verkada Access Control System on Jun 25, 2020
While Verkada touts the security of its system and that how their new door...
Mobile Access Control Usage Statistics 2020 on Sep 21, 2020
Most smartphones can be used as access control credentials, but how...
Gait Recognition Examined on Sep 14, 2020
Facial recognition faces increasing ethical and political criticisms while...
Monitoring Alarm Systems From Home - Innovation or Danger? on Oct 13, 2020
Remote monitoring by alarm companies since COVID-19 is bringing cost savings...
Access Visitor Management Systems Guide on Jul 22, 2020
"Who are you, and why are you here?" Facilities that implement Visitor...
False: Verkada: "If You Want To Remote View Your Cameras You Need To Punch Holes In Your Firewall" on Jul 31, 2020
Verkada falsely declared to “3,000+ customers”, “300 school districts”, and...
Verkada: "IPVM Should Never Be Your Source of News" on Jul 02, 2020
Verkada was unhappy with IPVM's recent coverage declaring that reading IPVM...

Recent Reports

ISC Brasil Digital Experience 2020 Report on Oct 23, 2020
ISC Brasil 2020 rebranded itself to ISC Digital Experience and, like its...
Top Video Surveillance Service Call Problems 2020 on Oct 23, 2020
3 primary and 4 secondary issues stood out as causing the most problems when...
GDPR Impact On Temperature / Fever Screening Explained on Oct 22, 2020
What impact does GDPR have on temperature screening? Do you risk a GDPR fine...
Security And Safety Things (S&ST) Tested on Oct 22, 2020
S&ST, a Bosch spinout, is spending tens of millions of dollars aiming to...
Nokia Fever Screening Claims To "Advance Fight Against COVID-19" on Oct 22, 2020
First IBM, then briefly Clorox, and now Nokia becomes the latest Fortune 500...
Deceptive Meridian Temperature Tablets Endanger Public Safety on Oct 21, 2020
IPVM's testing of and investigation into Meridian Kiosk's temperature...
Honeywell 30 Series and Vivotek NVRs Tested on Oct 21, 2020
The NDAA ban has driven many users to look for low-cost NVRs not made by...
Ubiquiti Access Control Tested on Oct 21, 2020
Ubiquiti has become one of the most widely used wireless and switch providers...
Avigilon Aggressive Trade-In Program Takes Aim At Competitors on Oct 20, 2020
Avigilon has launched one of the most aggressive trade-in programs the video...
Mexico Video Surveillance Market Overview 2020 on Oct 20, 2020
Despite being neighbors, there are key differences between the U.S. and...
Dahua Revenue Grows But Profits Down, Cause Unclear on Oct 20, 2020
While Dahua's overall revenue was up more than 12% in Q3 2020, a significant...
Illegal Hikvision Fever Screening Touted In Australia, Government Investigating, Temperature References Deleted on Oct 20, 2020
The Australian government told IPVM that they are investigating a Hikvision...
Panasonic Presents i-PRO Cameras and Video Analytics on Oct 19, 2020
Panasonic i-PRO presented its X-Series cameras and AI video analytics at the...
Augmented Reality (AR) Cameras From Hikvision and Dahua Examined on Oct 19, 2020
Hikvision, Dahua, and other China companies are marketing augmented reality...
18 TB Video Surveillance Drives (WD and Seagate) on Oct 19, 2020
Both Seagate and Western Digital recently announced 18TB hard drives...