Xtralis VESDA VLS Product Guide

VESDAVLSProduct Guide VESDA by Xtralis
26 www.xtralis.com
6.1.1 VESDAnet Terminals
VESDAnet is a bidirectional data communication network between connected VESDA devices. VESDAnet
cables are terminated at the VESDAnet A and B Terminals on the termination card. Communication wires
from another VESDA device are brought into the detector at one terminal and looped out to another device on
VESDAnet from the other terminal. It is necessary to maintain the polarity throughout the network. It is
recommended that RS 485 (Belden 9841 - 120 Ohm) twisted pair cables, or similar cables be used.
The VESDA VLS is shipped with the VESDAnet A and B terminals looped. If the detector is not to be
networked with other devices, then do not disturb this loop. Remove this loop to connect the detector to the
VESDAnet.
Shield
A-
A+
Shield
B-
B+
Figure 6-3: Stand -Alone VESDAnet Connection
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+
Figure 6-4: An example of the wire connection for VESDAnet (closed loop for illustrative purposes only)
6.1.2 Connections for GPI
10
1
1
GPI-
GPI+
-0V
+24V
Figure 6-5: Wire connection details (GPI)

Xtralis VESDA VLS Specifications

General

Brand	Xtralis
Model	VESDA VLS
Category	Smoke Alarm
Language	English