VESDA VLC-400 Product Guide
VESDA by Xtralis
8
www.xtralis.com
2.3.1
Termination Card
The termination card provides the physical interface between the VESDA VLC-400 detector and the fire panel
and allows power, VESDAlink and other auxiliary wires to be connected to the detector.
The termination card is attached to the main enclosure by four screws (see Figure 2-2) and contains:
l
PC connector:
The DB9 connector provides the communications interface for programming the detector
using Xtralis VSC. See below.
l
Loop address DIP switch:
An eight-position DIP switch sets the loop address for the detector. The
address is set in binary. Refer to Section 7.10 on page 28 for further information.
l
Termination card wiring:
See below for a description of the termination card connectors.
l
Fuse:
The power protection fuse (1.6A) is replaceable and protects the detector’s electrical system
against short circuit or overload.
Legend
A
PC Connector
B
Address Loop DIP Switch
C
LED Card Connector
D
Aspirator Connector
E
1.6A Fuse
F
Power Connections
Two sets in parallel
G
Fire Relay Connections
H
Power Supply Monitor
Connections
I
External LED Connections
J
Loop IN/OUT Connections
Figure 2-3: Termination Card Layout
VESDAlink programming interface
The VESDAlink programming interface is via a standard DB9 connector on the termination card. This
connection provides a RS-232 serial communications link to a PC running Xtralis VSC enabling full
configuration and maintenance diagnostics of the detector.
Power supply and communication signal connectors
There are three wire terminal strips on the card to terminate the wires. The maximum wire size that can fit into
the terminal is 2.5sq mm (12AWG).
The 10-pin screw type connector provides field connections for:
l
Loop IN/OUT. Consists of LOOP IN-, LOOP IN+, LOOP OUT- and LOOP OUT+ and allows for multi-
drop connection of detectors.
l
External LED. Consists of LED- and LED+ and connects to an external LED.
l
Power Supply Monitoring. PSM- and PSM+ contacts provide a monitoring facility for the external power
supply and trips a fault condition if the 47kOhm End-of-Line (EOL) resistor is not sensed.
The 5-pin screw type connector provides a connection for:
l
Fire Relay. Consists of one set of changeover relay contacts (NC, C and NO).
l
Power 24VDC. Two parallel power connection points (one set on the 5 pin screw type connector and one
set on the 2 pin screw type connector) are provided for convenient loop-through wiring.
Figure 2-4 below shows the possible field wiring connections for the termination card.
