Section I Descriptions
I-2
P/N 446613 Issue I Rev. A
Minimum Control Unit Configuration
The minimum configuration consists of the following components:
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Sub-Chassis
Assembly
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Chassis
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Main
Board
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Operator Interface Board
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Transformer
Assembly
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Enclosure
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Hardware
The basic control unit includes 4 Class B, Style B, initiating device circuits. All are
adaptable to accept smoke detectors, manual stations, or supervisory contacts and
zone 4 can be programmed to accept waterflow switches. All may be programmed for
alarm verification. Each zone may be individually disabled.
The minimum control unit configuration also includes 2 Class B, Style Y, notification
appliance circuits. Each is rated at 1.5A at 24VDC maximum, with a total of 2.25A at
24VDC available. Output pattern is steady. Each NAC may be selected for silencable or
non-silenceable operation.
As standard features, the minimum configuration control unit includes the following:
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General alarm operation
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Drill Test operation
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History
Recall
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Manual alarm silence with 0, or 1 minute inhibit function
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System Reset, Alarm Silence, Trouble Silence, General Alarm, History Recall, Lamp
Test, City Tie Disable, Zone/sig Disable and Quick Test switches
Also included in the minimum control unit are:
þ
Resettable and non-resettable power outputs for 4-wire smoke detectors, (maximum
.2 amps for resettable and non-resettable outputs combined)
þ
Non-resettable power output for auxiliary devices, (maximum .5 amps - must not
exceed 2.25 amps when combined with signal power)
Main Board
The Main Board is mounted in the sub-chassis assembly which mounts in the
backbox and provides the termination points for the power inputs and outputs,
status relays and the four initiating device circuits and two notification appliance
circuits. This board carries the main microcontroller, buzzer and the control unit
configuration. The power supply float charges the sealed lead-acid batteries.
The Main Board also contains the ground fault detection.
Operator Interface Board
The Operator Interface Board mounts on the back of the door and is connected to the
Main Board by a ribbon cable. The indicators are light emitting diodes (LED’s), visible
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