System Q CON822 Instructions

SIDE A - 16/07/03 Doc X
CON822
CON822 RJ45 Passive - 4 RJ45 INPUTS 4 BNC OUTPUTS INSTRUCTIONS
It is possible to send video signals down one CAT5 cable. The CON822 is a useful balun for terminating 4 separate CAT5 radials from balun
types CON804 or CON805 in to one 4-way balun.
Whereas co-ax cables are classed as an "unbalanced" mode of transmission, CAT5 twisted pair is known as a balanced mode. In this balanced
mode, the two cores carrying the video signal are balanced to a particular reference point and the cable twists enable a uniform rejection of the
interference, effectively cancelling it out. To produce a balanced signal BALUNs are used, standing for BALanced to UNbalanced.
Baluns come in two distinct groups. Passive baluns require no power to operate and work up to distances of about 500M although if you are
using baluns to send video signals back to multiplexers, quads and DVR it is recommended not to use passive baluns over 200mtrs. Active
baluns require power for their "active" circuitry and can send video signals over 1Km down low-cost CAT5 cable. Most baluns do not allow
you to send power down the CAT5 cable so you will still need to power the camera locally or run another separate cable for power. The
CON822 is a passive type balun.
Using a video balun.
The balun requires one pair of cores for each of the video
signals.
The CON822 balun converts 4 separate RJ45 balun inputs in
to 4 standard BNC outputs. Each balun input receives its
video signal down a separate CAT5 cable. At the camera end
of the cable balun types CON804 (RJ45 connector) or
CON805 (terminal strip connector) can be used.
Because a continuous signal is required, baluns cannot send
the video through "hubs" or computer "switches" as they work
in purely analogue method rather than the digital "packet"
method of hubs or switches. This means that you cannot use
baluns to send video pictures through existing computer
networks that use switches or hubs.
Step 1– Run in your CAT5 cable. This needs to be run
between your camera and the rest of your CCTV equipment.
Step 2– Identify the various pairs within the CAT5 cable. Four
pair CAT5 cable has 4 easy to identify pairs. If you have used
the new type of CAT5 cable for CCTV then the pairs are even
easier to identify.
Step 3 – Put on your RJ45 plugs. If you use CON822 and
CON804 as a combination then put your RJ45 plug on as per
the diagram on the right for both cable ends. If you use the
CON805 (terminal strip balun) at the camera end please use
the diagram overleaf for the CON805 connections. The CAT5
cable needs to be prepared so that you can slide in the
individual cores in the correct order into the RJ45 plug. You
need to strip back about 1cm of sheathing to do this and then "fan" out the individual cores so that they will slide into the plug in the correct
order. There are two diagrams on the right. One is for traditional CAT5 cable; the other is for the new CCTV CAT5 cable. You must take
great care making sure you get the cores in the correct order, as this is where mistakes are easy to make.
Once you have the cores in the RJ45 plug, you need to use your crimping tool to make off the end. The crimping tool actually presses the pins
into the individual cores and also locks the plug on to the cable. TIP - make sure all the cores go to the end of the plug or they won't all be
crimped!!
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