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5.0 Module Settings
5.1 Main Fire Alarm Module (MD-871A “N” Version Main Chassis)
This main board has one addressable loop and network capability.
JW1 Jumper is removed if a PR-300 or UDACT-300A is installed.
JW2,JW4 Jumpers are Factory Set and should not be changed.
JW5 Normally un-installed, add jumper to silence on-board buzzer.
JW6 Normally installed, remove jumper to enable external power supply supervision.
P1,2 Factory connection to Bridge Rectifier.
P3 Black RS-485 Connector connects to the Adder Loop ALCN-4792MISO if used
(Address Loops 3 and 4) or ALCN-960MISO (Address Loop 3 and 4)
P4 Connector for PR-300 Module or UDACT-300A.
P5 Connector for next 8 Conventional Hardwire Circuit Adder Modules (Loop 1).
P6 Connector for first 8 Conventional Hardwire Circuit Adder Modules (Loop 0).
P7 Ethernet jack.
P8 Power Connector for Adder Modules.
P9 RS-232C for Printer or “CRT” Monitor.
P10,11 Connection to 24 VDC Battery. Observe Polarity.
P14 Connector for Display Module.
P15, J1 Connectors for Factory Use.
P16 High speed RS-485 audio link to ANC-4000 Audio Network Controller Module.
When connected provides ARCnet or Fiber Optic audio and telephone
communication
P19 Connector for FNC-2000 Fire Network Controller Module.
SW2 DIP Switch for node address.
NAC PWR 24V FWR input terminals for additional power for signal adder modules.
F1 20 Amp slow blow non-replaceable fuse.
Note: To enable communication from the Main Module to all of the Adder Modules, it is necessary to add a
Continuity Jumper on the last Adder Module in a chain (see the appropriate Module Settings section to
verify the location of the Continuity Jumper on a particular Circuit Adder Module). Only the last circuit
adder module should have a jumper plug on its continuity jumper; all others must be left without a
jumper plug.
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