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Finish Installation
Building Automation System Wiring
There are several methods of connecting When alarm condition is corrected, relay
MEGA2 alarm panels to a building contacts will close. Relay contact ratings
automation system depending upon what are 2 A @ 30 VDC/0.5 A @ 125 VAC.
type of information is required and what Refer to Figure Schematic 7 (Pg. 19).
type of building automation system is
Annunciator Module General Fault Relay:
being used.
The annunciator module is supplied with
Multi-Signal Module Relays: an alarm panel general fault output relay.
As an option, mutli-signal modules may This relay has a set of dry contacts that
be ordered with five output relays, one for may be wired either normally open or
each of five signals that multi-signal is normally closed. The relay will activate
capable of monitoring. Each relay has a when ANY alarm on ENTIRE alarm panel
set of dry, normally-closed contacts that is activated. Relay will remain activated
will open when an alarm is activated on as long as alarm condition is active, even
corresponding front panel signal. For if audible alarm is silenced by MUTE
example, when an alarm condition button. When alarm condition is
activates on top multi-signal front panel corrected, relay will deactivate. Relay
alarm location (Signal 1), relay labeled
contact ratings are 2 A @ 30 VDC/0.5 A @
“Signal 1” will activate opening its 125 VAC. Refer to Schematic 6 (Pg. 19).
contacts. Relay contacts will remain open
as long as alarm condition is active, even Annunciator Module Auxiliary Relay:
As an option, annunciator module may be
if audible alarm is silenced by MUTE
supplied with an additional auxiliary relay.
button. When alarm condition is
This auxiliary relay does not replace
corrected, relay contacts will close. Relay
general fault relay described above.
contact ratings are 2 A @ 30 VDC/0.5 A @
Auxiliary relay has a set of dry contacts
125 VAC. Refer to Schematic 5 (Pg. 18).
that may be wired either normally open or
Digital Display Module High/Low normally closed. Like general fault relay,
Relays: auxiliary relay will activate when ANY
Each digital display module is supplied alarm on ENTIRE alarm panel is initiated.
with two separate output relays. One Unlike general fault relay, auxiliary relay
relay for high line pressure alarm and will deactivate when audible alarm is
another for low line pressure alarm.
silenced by MUTE button. If alarm
Each relay has a set of dry, normally- condition is still active when mute function
closed contacts that will open when an
cancels, auxiliary relay will reactivate.
alarm is activated on corresponding front Relay contact ratings are 2 A @ 30
panel signal. For example, when a low VDC/0.5 A @ 125 VAC. Refer to
pressure alarm condition activates on
Schematic 6 (Pg. 19).
digital display module front panel, relay
labeled “Low Relay” will activate, opening
its contacts. Relay contacts will remain
open as long as alarm condition is active,
even if audible alarm is silenced by MUTE
button.
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Part No. 6-847684-00 Rev. E00
