FM Systems ATU-2 User manual

ATU-2 \ ARU-2
ALARM TRANSMITTER \ RECEIVER UNIT
INSTRUCTION BOOK
IB6362-01
10-1-2002

TABLE OF CONTENTS
DESCRIPTION 1
MOUNTING INSTRUCTIONS 1
HOW TO CABLE THE ATU-2 2
HOW TO CABLE THE ARU-2 2
POWER SUPPLY INSTALLATION 2
SET-UP OF THE ATU-2 AND ARU-2 3
OPERATION 3
CARE AND MAINTENANCE 3
APPLICATIONS (WHERE TO USE THE SYSTEM) 3
ATU-2.ISB

DESCRIPTION
These devices transmit and receive alarm and control signals
encoded on video in coaxial cable or microwave. You can insert
your alarm and control signals anywhere a video signal is being
used including optical laser transmission. Two Alarm and control
signals may be carried over any distance by the video signal. One
of the contacts may be used for a signal integrity alarm.
The ATU-2 ALARM TRANSMITTING UNIT and the ARU-2 ALARM
RECEIVING UNIT together make up a 2 channel alarm and control
system which can provide up to 6 alarm and control channels on any
one video signal. The alarm and control signals are inserted into
the Vertical Interval of the video signal so that they will not
interfere with the picture. When the video signal is recorded, the
alarm and control information in also recorded and can be recalled
at play back. Alarm and control signals will be correlated with
the video events.
Each pair of ATU-2 / ARU-2 will transmit and receive 2
alarms. Three sets of units may be connected to any one video
channel, allowing 6 alarms to be transmitted on one coaxial cable.
One channel may be used as a system alarm that will operate
upon loss of power to either terminal or loss of transmission path
(coax cable cut). In the event of power failure to the ATU-2 or
ARU-2 the video thru-put is not interrupted.
Contact closures to the ATU-2 input will be repeated as
contact closures at the ARU-2 output.
The system is housed in a bone colored ABS enclosure that has
a UL flame rating of 94-VO and is powered by any 24 VAC or VDC
power supply (24 VAC is supplied with the units). The system has a
power on, video on LED for installation and trouble shooting of
the video system.
MOUNTING INSTRUCTIONS
The rugged one piece mounting structure allows you to mount
the unit firmly in place with two screws. Select a place to mount
the unit away from harsh or wet environments, indoors is
recommended. The ATU-2 should be located near your originating
signals and the ARU-2 near your alarm panel or the place you wish
to bring the signals to. Select a position that gives you the best
access to cable the system and reduces the labor in installation.
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HOW TO CABLE THE ATU-2
Connect the video cable you wish to use from the camera to
the "VIDEO IN" BNC connector and connect the cable going to the
ARU-2 to the "VIDEO OUT" BNC connector. It is not necessary for
power to be on at this time, the video path will only be
interrupted during the cable attachment. This system will function
with video from any kind of CCTV camera or any NTSC professional
video. Next attach the alarm or control wires for each station to
the green connector block marked A and B. Each pair of screw
terminals marked A and B are LOOP inputs. Attach your Dry Contact
Closures to these screw terminals. The current for loop sensing is
built into the ATU-2. Do not connect TTL signals to these
connections.
HOW TO CABLE THE ARU-2
Connect the video cable you are using to the "VIDEO IN" BNC
on the ARU-2 and the "VIDEO OUT" BNC goes to the monitor, recorder
or other video equipment. BE SURE TO TERMINATE THE END OF THE
VIDEO CABLE WITH A 75 OHM TERMINATION OR PROPERLY TERMINATED INTO
OTHER EQUIPMENT. Next attach the alarm or control wires for each
station to the green connector block marked A and B. These wire
can go to your alarm panel or control device. Each pair of screw
terminals marked A and B are relay contact closures. The outputs
from connector block A and B will duplicate the signals from the
ATU-2 inputs. A contact closure at A of the ATU-2 will result in a
contact closure at A of the ARU-2 and so on.
POWER SUPPLY INSTALLATION
The ATU-2 and ARU-2 are powered by two 24 Volt AC or DC wall
mount power transformers (24VAC included). Connect the 24 VAC
power transformer to the Green terminal block marked 24V AC/DC.
The ATU-2 can be powered by power sources as low as 9 volts AC or
DC. However the ARU-2 must be operated with 24 Volts AC or DC.
At this time you will see the Green LED turn on to indicated
power up, it will be on or be flashing on and off, depending on
the video status. Power on with no video will cause the LED to
light up and flash on and off. Power on with video input will
cause the LED to light up fully.
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SET-UP OF THE ATU-2 AND ARU-2
Both units can operate on 6 separate channels. The units are
shipped on the standard channel 10 and 11. If you wish to use the
units on a different channel or wish to operated more than one
unit on the same video signal, then it is necessary to program the
new channel. Programming the new channel is done with Jumper Jacks
on the inside of the box. Open the box by removing the 4 screws in
the outer most corners of the box. Lift up the lid and look for
the Black selection jumpers, there are 2 of them near the
selection table printed on the PC Board. Select the channel you
wish to operate on lines 10-15 and arrange the jumpers to select
that channel. You must select the same channel for both ATU-2 and
ARU-2 so they will work together. As many as 3 ATU-2 and ARU-2
units can be used on the same video signal by programming them to
different channels. When the ARU-2 is on the same channel as an
ATU-2 with the power applied and video on the Green LED on the
ARU-2 will stop flashing and stay on. This indicates that the
video is being received.
OPERATION
When the units have been installed and are operating you will
see that when a contact on the ATU-2 is closed and relay in the
ARU-2 closes. Through the video\data path the alarm sense is
relayed to the alarm panel or other equipment directly. If there
is a power failure the video path is not obstructed by the ATU-2.
If the power fails on the ARU-2 then both relays will open
regardless of the position of the ATU-2 contacts. If a system
alarm is desired to indicate a loss of communication between the
ATU-2 and the ARU-2, one set of the contacts at the ATU-2 can be
wired closed then the contact will serve as a system alarm
contact. This contact will open if power fails on either unit or
if the path between the two units is interrupted.
CARE AND MAINTENANCE
There is no routine maintenance or calibration required with
this equipment. There are no controls to adjust inside the box.
Open the box if necessary only to choose the desired operating
channel.
APPLICATIONS (WHERE TO USE THE SYSTEM)
This system can be used anywhere that a video signal on coax
cable or twisted pair exists. Some uses are in a CCTV camera
installation, LASER OPTICAL transmission, STL microwave
applications, Broadcast TV transmissions, Cable TV, Alarm and
Control and many others.
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