Table 4: Supported EOL and supervisory current
EOLR value Current
3.9 K ohm (0734-171) 5.7 mA
4.7 K ohm (0733-896) 4.8 mA
5.1 K ohm 4.4 mA
5.6 K ohm 4.0 mA
10 K ohm (Default) 2.2 mA
15 K ohm 1.4 mA
6.2.1.2 Wiring Class A NACs
To wire a Class A NAC, complete the following steps:
1. Use DIP switch SW3-4 to select the Class A configuration.
Figure 15: DIP switch SW3-4
2. Route the wire from the B+ and B- terminals of the system board to the appropriate inputs on a peripheral notification appliance.
3. Route the wire from the first appliance to the next. Repeat this step for each appliance.
4. Route the wire from the last appliance to the A+ and A- terminals on the same NAC circuit of the system board.
5. Do not T-Tap the wiring.
Figure 16: NAC wiring
6.2.1.3 Wiring Class B NACs
To wire a Class B NAC, complete the following steps:
1. Route the wire from the B+ and B- terminals of the system board to the appropriate inputs on a peripheral notification appliance
as shown in Figure 16.
2. Route the wire from the first appliance to the next. Repeat this step for each appliance.
3. Terminate the Class B circuits with a listed 10 k, 1/2W end-of-line resistor harness, part number 0733-894 or different value EOL
resistor. See the Selecting an end-of-line resistor section.
page 23 579-1402 Rev B
2004 Foundation Series Fire Alarm Control Unit Installation Guide
To Next Page
Loading...
