32
Part No. 6-847684-00 Rev. D01
There are several methods of connecting
MEGA2 alarm panels to a building
automation system depending upon what
type of information is required and what
type of building automation system is
being used.
Multi-Signal Module Relays:
As an option, mutli-signal modules may
be ordered with five output relays, one for
each of five signals that multi-signal is
capable of monitoring. Each relay has a
set of dry, normally-closed contacts that
will open when an alarm is activated on
corresponding front panel signal. For
example, when an alarm condition
activates on top multi-signal front panel
alarm location (Signal 1), relay labeled
“Signal 1” 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. When alarm condition is
corrected, relay contacts will close. Relay
contact ratings are 2 A @ 30 VDC/0.5 A @
125 VAC. Refer to Schematic 5 (Pg. 18).
Digital Display Module High/Low
Relays:
Each digital display module is supplied
with two separate output relays. One
relay for high line pressure alarm and
another for low line pressure alarm.
Each relay has a set of dry, normally-
closed contacts that will open when an
alarm is activated on corresponding front
panel signal. For example, when a low
pressure alarm condition activates on
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.
Finish Installation
Building Automation System Wiring
When alarm condition is corrected, relay
contacts will close. Relay contact ratings
are 2 A @ 30 VDC/0.5 A @ 125 VAC.
Refer to Figure Schematic 7 (Pg. 19).
Annunciator Module General Fault Relay:
The annunciator module is supplied with
an alarm panel general fault output relay.
This relay has a set of dry contacts that
may be wired either normally open or
normally closed. The relay will activate
when ANY alarm on ENTIRE alarm panel
is activated. Relay will remain activated
as long as alarm condition is active, even
if audible alarm is silenced by MUTE
button. When alarm condition is
corrected, relay will deactivate. Relay
contact ratings are 2 A @ 30 VDC/0.5 A @
125 VAC. Refer to Schematic 6 (Pg. 19).
Annunciator Module Auxiliary Relay:
As an option, annunciator module may be
supplied with an additional auxiliary relay.
This auxiliary relay does not replace
general fault relay described above.
Auxiliary relay has a set of dry contacts
that may be wired either normally open or
normally closed. Like general fault relay,
auxiliary relay will activate when ANY
alarm on ENTIRE alarm panel is initiated.
Unlike general fault relay, auxiliary relay
will deactivate when audible alarm is
silenced by MUTE
button. If alarm
condition is still active when mute function
cancels, auxiliary relay will reactivate.
Relay contact ratings are 2 A @ 30
VDC/0.5 A @ 125 VAC. Refer to
Schematic 6 (Pg. 19).
