VESDA by Xtralis VESDA VLI Product Guide
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A+
A-
B-
Shield
Module 1 Module 2 Module 3
Module 5 Module 4
Shield
B+
A+
A-
B-
Shield
Shield
B+
A+
A-
B-
Shield
Shield
B+
A+
A-
B-
Shield
Shield
B+
A+
A-
B-
Shield
Shield
B+
(VLI-885)
Figure 3-11: Example closed loop VESDAnet network
The VLI-885 detector is shipped with the VESDAnet A and B terminals looped. Remove the A and B links prior
to connecting the detector to the VESDAnet. If the detector is not to be networked with other devices, then do
not remove the A and B links.
Note: For each VLI-885 detector connected on VESDAnet, ensure that the shield link wire (supplied) is
retained as shown by the dotted line in Figure 3-11. The link wires [A+ to B+] and [A- to B-] (not
shown in the figure but supplied for stand-alone operation) should be removed. On other VESDAnet
devices all the link wires are removed when connected on VESDAnet.
Figure 3-12: Closed loop for standalone detectors with VESDAnet capability
Note: Refer to the VESDA Communications Guide for further information.
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