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Products
RE-BNCRJ1
Passive balun for video over twisted pair. Max. range 600 m. B/W, 400
m. Colour. Two baluns per camera required.
RE-BNCRJ1A
Passive balun for video/audio/DC power over twisted pair. Max. range 100 m.
RE-BNCRJ2L
Active balun for video over twisted pair.
Max. range 3000 m. B/W, 2400 m. Colour.
RE-BNCRJ2
Active balun for video+audio+RS485 BUS over twisted pair.
Max. range 2400 m. B/W, 1500 m. Colour.
Further information
Tutorial
Technical info
Prices
Price
list
Place an order
How to order
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RG59
coaxial cable
Twisted pair cable with 2 pairs
UTP
CAT5
Twisted
pair cable with 4 pairs
(recommended cable)
RE-BNCRJ1
Passive balun 400/600 m.
Video only
New "SLIM" casing for convenient side-by-side mounting
technical info
RE-BNCRJ1A
Passive balun 100 m.
Video+Audio+12VDC power
technical info
RE-BNCRJ2L
Active balun 2400/3000 m.
Video only
technical info
RE-BNCRJ2
Active balun 1500/2400 m.
Video+Audio+RS485
technical info |
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GENERAL INFORMATION
Coaxial cable
The type of cable most commonly used
in CCTV applications is coaxial cable, such as the cable shown here. The
most common type is called RG59 and it carries video signals a distance of
up to a few hundred metres, causing signal attenuation in proportion to the
length of the cable (for further details see the
tutorial on video
connections and
tutorial on signal attenuation)
Twisted pair cable
Twisted pair cable is now increasingly
used in place of coaxial cable for CCTV connections. Instead of a single
conductor cable (unbalanced transmission) a
cable containing a twisted pair of conductors is used, of the same kind
deployed in computer or telephone networks (balanced transmission).
THE BENEFITS:
 Longer
cable lenght
Twisted
pair cable costs less than coaxial cable
Two
or more cameras can run off a single cable
Existing
cabling can be used
Greater
protection from interference
In order to use twisted pair cable for
CCTV applications two converters or baluns are required: one positioned near
the camera (transmitter) and one at the other end of the cable (receiver).
These devices balance the unbalanced signal from the camera and unbalance it
at the other end. For this reason they are very often called BALUN (balanced-unbalanced)
What cable to use with DSE converters
The cable recommended
for use with DSE converters is the classic CAT-5 UTP non shielded network cable with contains 4 twisted pairs.
Up to 4 cameras can be run off a single cable.
It is also possible to use different cables, shielded or unshielded, and in
different materials, the only condition being that the conductors are
twisted into pairs. The use of alternative cables may mean less efficient
performance levels.
More details are provided in the tutorial
on twisted pair cables.
Passive and active converters
DSE range includes passive and active baluns. Active baluns gives longer transmission range but need DC power supply.
All DSE baluns come with high quality transient protection against electrical spikes
PASSIVE BALUNS
Passive converter - Video only
400/600 m. range
RE-BNCRJ1
The passive converter RE-BNCRJ1 is the most practical to use with twisted
pair cable as it does not require an external power supply. At one end it
has a BNC connector to connect to the CCTV device (camera and monitor). On the other side it has 2 screw terminals to connect one of the four pairs of the CAT5 cable.
Two converters are needed
for each camera at each end of the twisted pair cable. The device is in fact
reversible and functions as a transmitter when located near the camera and
as a receiver when positioned near the monitor.
The maximum length of cable possible
is 600 metres for transmitting a B/W signal and 400 metres for a colour
signal. This device does not carry audio signals.
Passive converter - Video+Audio+12VDC
100 m. range
RE-BNCRJ1A
The passive converter RE-BNCRJ1A is similar to the previous model RE-BNCRJ1 but besides video signal, can manage audio and 12VDC power as well.
This converter requires one CAT5 UTP cable per camera.
Unlike the previous model, the RE-BNCRJ1A is sold in pairs because transmitter and receivers are not the same.
The transmitter (camera side) has 1 BNC video input, 1 RCA audio input and 1 DC plug for the camera.
The receiver (monitor side) has 1 BNC video output, 1 RCA audio output and 1 DC jack to connect the camera power adaptor. UTP cable connects the 2 modules using the classic LAN plug RJ45.
Cable lenght cannot exceed 100 m. when 12VDC power transmission is used.
ACTIVE BALUNS
Active converter – Video only
2400/3000 m range
RE-BNCRJ2L
Unlike all passive converters above, the RE-BNCRJ2L, is an active converter, which means that is able to amplify the signal and extend the transmission range.
The max. distance between the camera and the monitor is up to 2400 m for color signals and up to 3000 m for B/W.
The product includes one transmitter and one receiver. Both need 12VDC power supply (RE-AL4S adaptor to be ordered separately).
Each module include a switch for setting the boost level according to the real cable lenght.
Active converter – Video+Audio+RS485 BUS
1500/2400 m range
RE-BNCRJ2
The active converter RE-BNCRJ2 is similar to the previous model RE-BNCRJ2L but besides video signal, can manage audio and one RS485 BUS for controlling speed dome cameras.
This converter requires one CAT5 UTP cable per camera.
Both transmitter and
receiver require a 12VDC power supply. (2 pcs. 220VAC adaptor included)
The maximum lenght of cabling is 1500 m for color cameras and 2400 m for B/W.
For better understanding of this product, here below are the connection details of all product sides
Transmitter input (facing camera):
BNC
input to connect up to camera
Audio
(RCA) input to connect to camera with audio
Terminal
board for 12VDC power supply for camera
Transmitter output (twisted pair cable):
Connector
for 12VDC power supply
Selector
for level of amplification (Low/Medium/High)
Terminal
board for connection to an 8 pair LAN CAT5 UTP cable (2 video terminals - 2
audio terminals - 2 D1+/- terminals for use for serial commands for a Speed
Dome camera - 2 D1+/- terminals for use for an alarm sensor
Receiver
input (twisted pair cable):
Microswitches
to select amplification for ranges from 300 to 2400 metres.
Trimmer
to adjust luminosity of image
Terminal
board to connect to transmitter
Receiver
output (facing monitor):
BNC
video output to connect to monitor
Secondary
BNC video output (eg. for video recorder)
RCA audio
output to connect to monitor speaker
Connector
for 12VDC power supply and earth terminal
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