
LaserSCANNER Product Manual
VESDA
®
28
1.8
Power Source
There are two sets of power terminals on the termination card. Use one of the power terminals on
the termination card to connect to a 24 VDC power supply and if necessary loop out to another
device via the second set. The detector has reverse polarity protection to minimize the risk of
reverse power connection to the detector.
Note:
Regional differences in power supply may impact on power connection. Please
contact your Regional Vision Systems technical support for more information.
Note:
Operating the detector when DC supply voltage is outside the voltage range of 18
VDC and 30 VDC may cause damage to the device.
Note:
The LaserSCANNER detector will not operate when the supply is reversed.
Figure 21 - Wire connection details for power terminals on relays termination
card
1.9
Back Up Battery Power
The power supply for the LaserSCANNER is switched to a back up battery in the event of a
mains power supply disruption. The size of the back up battery is determined by local standards
and codes, the total power required by the system, back up time required, allowance for
reduction in capacity with age and expected temperature variations.
Note:
It is recommended that batteries be inspected and changed as per manufacturer’s
specifications or as per your local codes and standards.