AFP-100/AFP-100E Instruction PN 51010:C1 02/06/2002
77
DC Power for Output Circuits
Three types of DC power circuits (power-limited) are provided (TB4) as listed below.
Wire Requirements
Overview
T-tapping of the SLC wiring is allowed for 2-wire (Style 4) configurations. The total resistance of any
branch cannot exceed 40 ohms. The total wire length of all branches cannot exceed 10,000 feet
(3,000 meters).
Connecting external system accessories to the AFP-100 main circuits must be carefully considered to
ensure proper operation. It is important to use the correct type of wire, wire gauge and wire run length
for each AFP-100 circuit. Reference the chart on next page to specify wire requirements and limitations
for each AFP-100 circuit.
Note:
If the SLC is to be run in conduit with Notification Appliance Circuits, the risk of encountering problems can be
greatly reduced by exclusively employing electronic sounders (such as MA/SS-24D) instead of more electronically
noisy notification appliances such as electromechanical bells or horns.
Four-wire smoke detector
24 VDC (nominal)
Maximum ripple voltage: 10 mV
RMS
Maximum standby current: 50 mA
Up to 300 mA is available for powering four-wire smoke
detectors
1
2
1. Total current for special purpose power, nonresettable power, four-wire smoke power, and the two NACs,
must not exceed 6.0 amps. Total external system current in excess of 3.6 amps requires the XRM-24
transformer (XRM-24E for 220/240 VAC applications) and 12 AH or 18 AH batteries, not 7 AH batteries.
2. Total current for resettable four-wire smoke detector power and nonresettable power must not exceed
600 mA.
Nonresettable, filtered
24 VDC (nominal)
Maximum ripple voltage: 10mV
RMS
Maximum standby current: 150 mA
Total DC current available from this output is up to 300 mA
1 2
Nonregulated special purpose
24 VDC (nominal)
Operating voltage range: 18 VDC to 30 VDC
Total DC current available for powering external devices is 2.5
amps
2
Note:
This power is not to be used for AFM, LDM or LCD-2x20
annunciators
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