1-2
MEGA3 NFPA Medical Gas Notification System
4107 9016 59.03
1.2.3 Area Alarm
Monitors up to 8 digital gas sensors.
Features:
• Digital pressure/vacuum read out with
Low/Normal/High indicators
• Rough-in box capable of holding 8 locally
mounted sensors.
• Customizable Gas ID labels with location
• General fault relay that activates on any
pressure/vacuum fault condition
1.2.4 Combination Alarm
Monitors a mix of normally closed dry-con-
tact switch signals, 6 digital gas pressure/
vacuum signals, and provides dry-contact
relay outputs.
1.2.5 Boards
B05 Power Supply Board
Features:
• Supplies 24VDC to all circuit boards in
the alarm
B06 Digital Gas Sensor Board
Features:
• Monitors the Pressure/Vacuum from the
pipeline, and provides a gas-specific digi-
tal signal for the alarm.
• Heartbeat indicator to indicate proper
operation.
• Embedded in gas sensor assembly.
NOTE:
I
=
4-20mA Inputs
X
=
Source Signal Inputs
Y
=
Dry-Contact Relay Outputs
D
=
Digital Gas Sensor Inputs
B10, B11 NFPA Signal Input Board
Features:
• Monitors up to 20 normally closed dry-
contact switch signals on each board
• Heartbeat indicator to signal proper op-
eration.
Figure 5: B10, B11 Signal Input Board
Figure 4: B06 Digital Gas Sensor Board
Figure 3: B05 Power Board
