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4009 IDNet NAC Extender, Continued <br /> Hardware Components NAC(Notification Appliance Circuit)Outputs <br /> The 4009 IDNet system board provides 4 hardwired NACs. NACs 1 through 4 <br /> are Class B,reverse polarity Notification Appliance Circuits. Each circuit has one <br /> polarity for supervision state and the opposite polarity for alarm state. Field wiring <br /> terminations are provided for 12 AWG-18 AWG wire. Refer to the 842-068 <br /> Field Wiring Diagram for complete wiring,compatible appliances,current,and <br /> line distance information. Each circuit is capable of being independently <br /> controlled by the 4009 IDNet,as commanded by the host panel. <br /> The notification circuits use a l0k end-of-line resistor for supervision. The circuit <br /> is monitored for short and open circuit line faults when in the standby(not <br /> energized)condition.In the event of a short circuit,the 4009 IDNet will not <br /> activate the NAC while the short circuit fault is present. During coded signal <br /> operation,the 4009 IDNet checks for a short during each"off',and holds the <br /> circuit off if a short is detected. Short and open circuit faults are reported to the <br /> host panel via the command channel(either IDNet or hardwired,depending on <br /> configuration)and can be identified by a blinking trouble LED on the 4009 IDNet <br /> during supervisory state. <br /> The NACs are configurable as"Class A"circuits with the addition of an option <br /> card that plugs onto the base board. The option card also provides the additional <br /> field wiring terminations needed for Class A. The 4009 IDNet monitors for <br /> insertion of the Class A Option Card. The presence of the Class A Adapter Option <br /> Card must match the Hardware Configuration Switch(SW 1)for proper operation <br /> (see Table 1). <br /> In addition,when configured as an IDNet peripheral,each NAC has the ability, <br /> under software control,to disconnect its supervision,allowing earth fault <br /> isolation(this operation is also performed automatically as part of the power-up <br /> sequence). <br /> Battery Charger <br /> The battery charger charges lead acid batteries up to 18AH. Batteries are <br /> supervised for low/missing battery and depleted battery. The battery charger <br /> output remains disabled until a battery is sensed. <br /> Battery Cutout Module(Canadian Version only) <br /> The Canadian version of the 4009 IDNet NAC Extender includes a low battery <br /> cutout module and harness. The factory installed battery cutout module replaces <br /> the standard(US version)battery harness. The module disconnects the batteries <br /> if the terminal voltage drops below 19.3VDC during battery standby operation. <br /> Connection to the batteries is restored on resumption of AC power. <br /> Continued on next page <br /> 4 <br /> Technical Manuals Online! - http://www.tech-man.com <br />