User manual

Installation and User Manual ADPRO FastTx by Xtralis
4 Doc 11949_06
2.2.1 Power Conditioners and Surge Arresters
The use of an Uninterruptible Power Supply (UPS) should be considered in situations where the
mains power is unreliable. A good UPS has the ability to remove interference, sags, and power
surges that can cause false alarms, equipment failure or even terminal damage. UPS are used
effectively on all major computer installations and the microelectronics used in many video and
alarm systems (including ADPRO FastTx) are similar, both in their functionality, and their
susceptibility to ‘dirty’ mains power.
Power line conditioners or surge arresters can help prevent mains distortion of voltage, current,
and frequency caused by load switching, large electric motors, and lightning. These distortions
can cause unreliable operation, false alarms, and equipment failure, damage or even total
destruction.
2.2.2 Interference Caused by Ground Loops
In some installations, where cameras or monitors are located at a distance from the ADPRO
FastTx rack, considerable ground loop currents can be generated and may cause interference.
Supplying power to different components of the ADPRO FastTx system may also cause ground
loop currents. For example, cameras, monitors and the ADPRO FastTx chassis may receive
power from different phases of a multi-phase supply. Wherever possible, source power to all
components of the system from a common phase of the supply.
Where ground loop currents cause a problem in a ADPRO FastTx installation, the installer may
reduce the effect by installing a video isolation transformer on each video channel affected.
2.3 System Wiring Considerations
2.3.1 Electromagnetic Compatibility (EMC) Issues and
Instructions
When a ADPRO FastTx system is installed in accordance with the recommendations and
procedures in this manual, it will meet the EMC requirements of:
• EN 55022 / AS3548 Class A, and FCC Part 15 Class A digital devices in respect to
emissions, and
• EN 50130-4 Alarm Systems Immunity.
To ensure EMC compliance for your system installation, make sure of the following:
• CAT-5 Unshielded Twisted Pair (UTP) Data Cable is used for the Network port connection,
• RG-59 coaxial 75 ohm Video cable is used for all composite video connections and the
cables are terminated with 75 ohm BNC connectors, and
• Where possible, all cables should be shielded (single or dual) twisted pair and the shield
itself, along with the associated drain wire, terminated at the ADPRO FastTx with a
connection to the chassis.
Note: The foil used in some shielded cable is only insulated on one side. Always check
the foil shield with an ohm-meter and make sure that the conductive side is in
contact with shield termination recommendations in this manual.