VESDA VLF-500 Product Guide
VESDA by Xtralis
14
www.xtralis.com
Legend
A
End of Line Resistor (2.7k)
B
External device (1 to N)
C
GPI Pin 1
D
GPI Pin 2
Figure 2-10: Triggering of GPI
2.7.3
Extra terminals (Terminals 3, 4, 5, 6 & 7)
Terminals reserved for future use.
Legend
3
Display Tx
4
Display Rx
5
Display Comm Gnd
6
Display Power -
7
Display Power +
Table 2-2: Terminal block display, spare power terminals
2.7.4
Power supply (Terminals 8, 9, 10 & 11)
Operating voltage:
24 VDC nominal (18 - 30 VDC)
Power consumption:
9.8 W nominal, 11.7 W in alarm
Current consumption:
410 mA nominal, 490 mA in alarm
It is recommended that the power supply be compliant with local codes and standards required by the regional
authority. For code-specific information, refer to Codes and Standards Information for Air Sampling Smoke
Detection on page iii.
Caution:
Check the product termination wiring label during installation and subsequent maintenance
visits.
Attention :
Vérifiez l'étiquette de câblage de terminaison à la pose et lors des visites de maintenance
ultérieures.
Legend
8
Power Return
0 VDC
From power
supply unit
9
Power in 24 VDC
10
Power Return
0 VDC
To next detector
(if more than 1
detector per
Power Supply
Unit)
11
Power Out
24 VDC
Figure 2-11: Terminal block display, power supply