VESDA VLI Product Guide
VESDA by Xtralis
20
www.xtralis.com
3.2
Wiring
The screw type terminals located on electrical terminals within the VLI detector will accept wire sizes
from 0.2 mm
2
to 2.5 mm
2
(30 – 12 AWG).
Refer to Codes and Standards Information for Air Sampling Smoke Detection on page iii for code
specific requirements.
Refer to the VESDA System Design Manual for cabling details.
Caution:
Electrostatic discharge (ESD) precautions need to be taken prior to removing the front
cover from the detector in order to prevent damage to sensitive electrical components
within the VLI.
3.2.1
Power Source
There are two sets of power terminals on the main board. Connect to a 24 VDC power supply to the
PWR IN socket, and if required loop out to another detector via the PWR OUT socket.
The detector will not operate if the power supply polarity is reversed.
Caution:
Operating the detector when DC supply voltage is outside the specified voltage range
may cause damage to internal components. For further information refer to the Product
Specifications on page 10.
Figure 3-6: Wire connection details for power terminals
Power to Multiple Detectors
Up to 8 detectors may be daisy chained to the same power supply by connecting the PWR OUT
power passthrough socket to the PWR IN socket on each subsequent detector.
Figure 3-7: Multiple Detectors powered by a single power supply
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