12 SFP-2402 & SFP-2404 Series Manual — P/N 51898:F3 8/6/2014
Product Description Controls and Indicators
Initiating Device Circuits - TB3
Alarm Zones 1 & 2 (SFP-2402 and SFP-2404)
Alarm Zones 3 & 4 (SFP-2404 only)
Power-limited circuitry
Operation: All zones Style B (Class B)
Normal Operating Voltage: Nominal 20 VDC, Maximum 27 VDC
Alarm Current: 15 mA minimum
Short Circuit Current: 40 mA maximum
Maximum Loop Resistance: 100 ohms
End-of-Line Resistor: 4.7K:, 1/2 watt (Part #71252)
Standby Current: 4 mA
Refer to the Notifier Device Compatibility Document for listed compatible devices
Notification Appliance Circuit(s) - TB2
1
One NAC on SFP-2402, two NACs on SFP-2404
Operation: Style Y (Class B)
Power-limited Circuitry
Normal Operating Voltage: Nominal 24 VDC, Maximum 27 VDC
Maximum Signaling Current: 2.5 amps total with standard transformer. 5.0 amps total (2.5 amp
VSHFLDODSSOLFDWLRQP$UHJXODWHGPaximum per NAC) with optional transformer on SFP-2404 only
Maximum Line Impedance: 1.5 volt drop end-of-line
End-of-Line Resistor: 4.7K:, 1/2 watt (Part #71252)
Refer to the Notifier Device Compatibility Document for compatible listed devices
Form-C Relays
Trouble Relay TB5 (fail-safe)
Alarm Relay TB6
Supervisory Relay TB7 (SFP-2404 only)
Relay Contact Ratings: 2 amps @ 30 VDC (resistive)
Resettable Special Application Power - TB1
Operating Voltage: Nominal 24 VDC
Maximum Available Current: 500 mA - appropriate for powering 4-wire smoke detectors
(see Footnote 1.)
Power-limited Circuitry
Refer to the Notifier Device Compatibility Document for compatible listed devices
Nonresettable Special Application Power - TB1 (SFP-2404 only)
Operating Voltage: Nominal 24 VDC
Maximum Available Current: 500 mA (see footnote 1 on page 12.)
Power-limited Circuitry
Refer to the Notifier Device Compatibility Document for compatible listed devices
1.3 Controls and Indicators
Front Panel Membrane Buttons
• Acknowledge
• Alarm Silence
• Reset
1. Total current for resettable power and one Notification Appliance Circuit must not exceed
3.0 amps for the SFP-2402. Total current for nonresettable power, resettable power and two
Notification Appliance Circuits must not exceed 6.0 amps for the SFP-2404 (requires
optional second transformer).
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