INTEGRITY VOICE ALARM ROUTING MATRIX
Integrity Voice Alarm Routing Matrix Installation & Maintenance Manual • Approved Doc. No. DCS0003214 Rev 0 (8/2/05) • Page 13
The DIP switches are used to select the audio input level to suit the outputs of different
classes of audio device and to provide a fixed routing trigger.
The connector has an open collector general fault output and allows up to four remote
unmonitored switches to be used to route the audio to different zones (subject to config-
uration).
Audio output cards
OP2 – Two zone audio output card
This card provides the connections for two zones on ‘Weidmüller’ connectors. That is, balanced
line level audio, control out/fault in and ground (technical earth) plus a programmable opto-
isolated output, typically used to trigger an override to third party sound systems.
Control card
CI-16
This card is usually used as a fire alarm interface that causes emergency messages to play,
but can be used to connect any normally-open switches in order to route any audio inputs
to audio zones. It provides sixteen pairs of trigger inputs, a reset pair, a general fault out-
put, an auxiliary fault output and a ground (technical earth). Triggers are normally
derived from fire alarm sounder circuits, which are reverse biased so that they can meas-
ure the presence of an end of line device (EOLD). This EOLD is usually connected across
each trigger pair at the rack terminations. In the event of an open or short circuit fault in
the trigger line, the fire panel will report a fault.
In order to ensure that a message, once triggered, does not stop unless it is positively
reset, the inputs will latch on and are only reset when a voltage is applied across the reset
pair. Individual inputs can be configured so that they do not latch if the application
requires this.
In some installations it is not possible to provide sounder outputs, in which case the auxil-
iary 24 V d.c. can be connected via normally open relay contacts to trigger the inputs.
Compliance with installation standards is usually achieved by installing the relays on a
detection loop that is physically connected to the equipment rack. The detection loop
itself is monitored by the fire detection system. Note that for maximum reliability, loop
isolators should be installed on either side of the relay interface.
Connecting the mainframe to a PC or printer
The lead shown below, which is normally used with SigNET’s LS system, is suitable for
connecting the mainframe to a PC or printer. However, a standard null modem cable,
which does not have the link between pins 7 and 8 may be used instead.
1
4
5
9
8
7
6
3
2
1
4
5
9
8
7
6
3
2
PC
Mainframe
9-pin female
9-pin male
