General Information
P/N 06-237041-001 1-11 February 2011
1-9.1 Main Controller Board Features
The Main Controller Board, the main processing element of the FenwalNET 8000-ML system,
incorporates these features into its PCB design:
• SLC circuits: Two onboard signaling-line circuits (SLC) for CLASS-A, CLASS-B or CLASS-A,
Style 7 operation with a 255 intelligent-device capacity per SLC circuit.
•NAC circuits: Two onboard notification-appliance circuits (NACs) for CLASS-A or CLASS-B
operation of audible or visual notification appliances such as horns, bells, strobes, etc.
• Combination R-NAC circuits: Two onboard field-configurable outputs for notification
appliances (NACs) or solenoid-operated control heads and valves.
• Trouble Relay: One dedicated (non-programmable) Form-C relay for trouble conditions,
including failure of the Main Controller Board.
• Field-Configurable Relays: Three independently-driven, programmable Form-C type relays
which can change for all states of alarm, trouble and supervisory conditions.
• USB Ports: Two USB-style communications ports for connection to a PC (device port) and
printer (host port).
• RS232 Ports: Two RS232 ports for interfacing to a PC (for remote configuration) or an RS232
printer.
• RS485 Remote Control/LED Annunciator interface: A dedicated interface for communication
and control of the Remote Display Control Module and LED Annunciator Module.
• RS485 Expansion Card I/O interface: A dedicated interface for communication and control of
installed expansion cards, Power Management Unit (PMU) Board and peripherals.
• Nonvolatile memory: Onboard nonvolatile memory can store an Event Log of up to 10,000
events with ability to view and erase (password-protected) and can store system configuration.
• Real-Time clock with Battery Backup: A Real Time clock for time/date synchronization and
display.
• Degrade Mode operation: A user-selectable option whereby, in the event that the Main
Controller Board’s microprocessor fails, loop devices can activate one or both NAC circuits on
the MCB (in continuous mode) if they go into Alarm.
• Ground Fault indication: A Ground Fault can be identified to a single circuit (LED indicator
lights on the front display).
Refer to Section 1-13 for information on expanding the functionality of the FenwalNET 8000-ML
system with add-on cards.
1-10 POWER SUPPLY/PMU ASSEMBLY
The Power Supply/PMU Assembly, shown below in Figure 1-9, is comprised of:
1. one (1) or two (2) Power Supply Units
2. one (1) Power Management Unit (PMU) Board
Note: The Power Supply/PMU Assembly can be located in any tier, as desired. When the Power
Supply/PMU Assembly is located in the Top Tier, the Main Controller Board with keypad/
display fits over it in a hinged arrangement.
The PMU and Power Supply Unit(s) are packaged separately inside the FenwalNET 8000-ML shipping
carton. Refer to Chapter 2, Section 2-4.3 and Section 2-4.4, for instructions on how to install the
Power Supply/PMU Assembly.
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