Reply
 
Thread Tools Display Modes
 
Old 08-14-2015, 10:31 AM   #1
Senior Member
 
Dune's Avatar
 
City: Coastal SC
Country: USA
Vessel Model: Viking 65 CP MY (run at trawler speeds !)
Join Date: Jul 2015
Posts: 370
Multifunction displays and cameras... does display turn on voltage to the cam, or ?

Situation is 2011 vintage Raymarine E120 W display. Have two analog video cams, Speco CNC-627M. When I go to video mode on the Raymarine one can choose 4 different cameras. I have 2 cameras, one in engine room, one aimed aft outside aft deck.

The one in engine room shows up fine on the display as camera 3. The other one...no signal. Yesterday found out "no signal" is because prior to my ownership of the boat someone pulled the cable out of the camera far enough that not only did it disconnect the wires from the connector internally, but as it pulled thru it caused the end terminals all 3 wires to end up touching each other !

So after separating the wires, I check voltage and get nothing...presume the touching caused a short somewhere.

The point of all this rambling is it would help to know how exactly these things are supposed to work to know where to look for a blown fuse or whatever. So the question is-

When you are in video mode on the Raymarine E120 and press, say, camera two....does the Raymarine turn on 12 volts to camera two....or do the cameras always have 12 volts "on" and the Raymarine only allows the signal wire activated for camera two ?
__________________
Advertisement

Dune is offline   Reply With Quote
Old 08-14-2015, 11:18 AM   #2
Guru
 
Codger2's Avatar
 
City: San Diego
Country: US
Vessel Name: "Sandpiper"
Vessel Model: 2006 42' Ocean Alexander Sedan
Join Date: Oct 2007
Posts: 5,420
Quote:
Originally Posted by Caladan View Post
When you are in video mode on the Raymarine E120 and press, say, camera two....does the Raymarine turn on 12 volts to camera two....or do the cameras always have 12 volts "on" and the Raymarine only allows the signal wire activated for camera two ?
My electronic guru says that the cameras always have power to them. I can't, however, confirm that! I also have two cameras, one that looks down on the cockpit and stern (handy for backing) & one in the ER. The cockpit camera is the most useful (IMO) as the ER camera doesn't give me much field of view.
__________________

__________________
Codger2

My passion for improving my boat(s) exceeds my desire to constantly cruise them.
Codger2 is offline   Reply With Quote
Old 08-14-2015, 12:35 PM   #3
Senior Member
 
Dune's Avatar
 
City: Coastal SC
Country: USA
Vessel Model: Viking 65 CP MY (run at trawler speeds !)
Join Date: Jul 2015
Posts: 370
Quote:
Originally Posted by Codger2 View Post
My electronic guru says that the cameras always have power to them.[B][I][U] I can't, however, confirm that!
It would make the most sense to me that the Raymarine display would not turn on the 12 volts but rather simply switches to the desired signal wire. But then again it seems a bit odd there would always be 12V on at the cameras even when not in use....so not sure what to think there.

However it is arranged, thank goodness the power wire short circuit in the aft camera didn't effect the entire video system.
Dune is offline   Reply With Quote
Old 08-14-2015, 03:52 PM   #4
Guru
 
psneeld's Avatar
 
City: Avalon, NJ
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 15,892
Quote:
Originally Posted by Caladan View Post
It would make the most sense to me that the Raymarine display would not turn on the 12 volts but rather simply switches to the desired signal wire. But then again it seems a bit odd there would always be 12V on at the cameras even when not in use....so not sure what to think there.

However it is arranged, thank goodness the power wire short circuit in the aft camera didn't effect the entire video system.

Why? I would think it typical that cameras are hotwired so you could view just by switching the video feed from them...as in surveillance cameras.

No need to wire some sort of switch at a remote camera location...especially if wireless.
psneeld is offline   Reply With Quote
Old 08-17-2015, 11:28 AM   #5
Senior Member
 
Dune's Avatar
 
City: Coastal SC
Country: USA
Vessel Model: Viking 65 CP MY (run at trawler speeds !)
Join Date: Jul 2015
Posts: 370
Quote:
Originally Posted by psneeld View Post
Why? I would think it typical that cameras are hotwired so you could view just by switching the video feed from them...as in surveillance cameras.

No need to wire some sort of switch at a remote camera location...especially if wireless.
Typical for security systems indeed but seems a little over the top to have a camera with voltage on 24/7 when one might be away from the boat. Still, apparently the cameras are designed with that in mind so I guess it's ok. Regardless I found the problem on Saturday... 12V input was disconnected deep in the bowels (space between flybridge floor and salon ceiling) of the boat.... a simple plug that required pulling 25 feet of wire to find....no clue how that happened.
Dune is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 10:23 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012