MPC-6000 / MPC-7000 / RND-2 INSTALLATION, OPERATION AND MAINTENANCE MANUAL
14
GENERAL DESIGN FEATURES
Environmental
All hardware is suitable for use in a dry, interior or protected location.
Power Limiting
The AC power and battery wiring are not power limited. All other circuits leaving the control
unit are power limited, provided the proper installation rules are maintained.
Ground Fault Detection
The control unit provides system ground fault detection and is annunciated as a trouble
condition on the system. In addition, each addressable loop circuit has its own ground
detection circuitry and indicator.
System (+) Ground Fault Threshold = 40K
Ω
System (-) Ground Fault Threshold = 300k
Ω
Loop Circuit Ground Fault Threshold = 20k
Ω
NAC Operation
The notification appliance circuits are commanded and controlled by a microprocessor to
provide more versatility than in a total hardware system
•
Output Sounding Patterns - The notification appliance circuits are operable in different
sounding patterns. Any circuit is selectable to any of eight software-generated patterns or
continuous sounding. For convenience, three of the patterns are preprogrammed for March
Time, Temporal, and Faraday SYNC Protocol.
•
Audible Silence Inhibit - In addition to designation of water flow zones, the entire control
unit may be programmed to inhibit audible silence for 0, 1, 3, or 6 minutes from the last
alarm. System reset may also be inhibited.
Transient Protection
Transient protection devices are provided to meet UL864 requirements.
Security Features
Processor control and addressing allow inclusion of several functions to assure security and
proper programming of the system.
Multi-level password protection of programming functions prevents unauthorized configuration
changes.
Device type supervision: If the type reported by an addressable detector or module does not
agree with the configuration, the system reports a trouble.
Device address supervision: The system checks that all configured devices on the addressable
device circuit and the Serial Interface Circuit responds to an address poll. If a configured
device is missing, the system reports a trouble. The system also polls unused addresses
periodically. If a device responds to such a poll of a non-configured device, the system reports
a trouble. Two devices addressed the same also cause a trouble to be reported.
