Avatar

Please consider registering
Guest

sp_Registration Register sp_LogInOut Log In
sp_Search Search
Advanced Search
Search

— Forum Scope —




— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

sp_Search Search

Register Lost password?
sp_Feed sp_TopicIcon
How far can this run PoE?
sp_NewPost Add Reply sp_NewTopic Add Topic
Avatar
jake
Member
Members
Forum Posts: 6
Member Since:
May 31, 2014
sp_UserOfflineSmall Offline
1
June 23, 2014 - 1:41 pm
sp_Permalink sp_Print sp_QuotePost
sp_ReportPost

I recently bought this NVR for an 11 camera system I’m installing. I am looking at using these cameras and powering them via PoE. I looked at the voltage calculator and tried to fill it out.. not sure if I did it correctly though. With 11 devices, I was wondering what the max length of cable I can run – some cables will be shorter than 20 feet, some might be longer than 100. How would I calculate the maximum supported length?

The spec sheet says 15W/PoE port, but I didn’t see amperage.. and I’m not quite sure how to calculate it anyways. Any help is much appreciated

Avatar
Brad Besner
Boca Raton, Florida
Admin
Forum Posts: 203
Member Since:
March 9, 2013
sp_UserOfflineSmall Offline
sp_UserWebsite
2
June 23, 2014 - 1:48 pm
sp_Permalink sp_Print sp_QuotePost
sp_ReportPost

Hello,

The POE distance limitation is about the same as it is for Ethernet. Typically you can go up to 300’ft from the POE device to the camera. The POE output will be 48V not 12V. This allows for the greater distance taking into account voltage drop for 300ft distance on 23 or 24 gauge ethernet cable. 

Avatar
jake
Member
Members
Forum Posts: 6
Member Since:
May 31, 2014
sp_UserOfflineSmall Offline
3
June 23, 2014 - 1:50 pm
sp_Permalink sp_Print sp_QuotePost
sp_ReportPost

Thanks for the reply, I appreciate it. Could you point out where it says the output is 48V?

Avatar
Brad Besner
Boca Raton, Florida
Admin
Forum Posts: 203
Member Since:
March 9, 2013
sp_UserOfflineSmall Offline
sp_UserWebsite
4
June 23, 2014 - 1:54 pm
sp_Permalink sp_Print sp_QuotePost
sp_ReportPost

all POE output is 48V. There are two POE standards. 802.3af and 802.3at. The 802.3af is 48v 15.4watts and the 802.3at (also known as POE+) is 48v and 25.5watts. This is the industry standard. 

Avatar
Brad Besner
Boca Raton, Florida
Admin
Forum Posts: 203
Member Since:
March 9, 2013
sp_UserOfflineSmall Offline
sp_UserWebsite
5
June 23, 2014 - 1:56 pm
sp_Permalink sp_Print sp_QuotePost
sp_ReportPost

also, if you check the downloads tab of the NVR you purchased you will see specifications. On the second page it says:

16 ports (IEEE802.3af) This refers to the POE standard 802.3af I was referring to. 

sp_NewPost Add Reply sp_NewTopic Add Topic
sp_Feed
Go to top
Forum Timezone: America/New_York

Most Users Ever Online: 138

Currently Online:
34 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

Dan Maresca: 460

Techpro Security: 404

shockwave199: 179

tubac: 166

Jer7of9: 151

Gilberto: 150

MrDeepFreeze: 136

javajeff: 132

Night Hawk: 100

West Coast Jones: 66

Newest Members:

ramonaiy11

TheresaGrals

marionxj2

Paiffsar

jennyro4

Staceyvew

WilliamNit

Howardfonus

osman abouzeid

vernontn4

Forum Stats:

Groups: 5

Forums: 28

Topics: 1359

Posts: 5675

 

Member Stats:

Guest Posters: 105

Members: 9206

Moderators: 13

Admins: 4

Administrators: Damon Delcoro, Brad Besner, Jose Malave, Gabe Garcia

Moderators: Ryan, Zeke Richey, Jorge Nava, Heath Phillips, Brian Lee, Eric Wilson, Michael, Tonya Haley, LittleBrad, Ted, Matthew Ernst, Ariel Millard, Thomas Dapra