Input Circuits - Honeywell Notifier SFP-2402 Instruction Manual

Input Circuits

2.3 Input Circuits
The SFP-2402 has two IDCs (Initiating Device Circuits) and the SFP-2404 has four IDCs. Each
circuit is compatible with System Sensor's i
when the detector becomes dirty and a separate supervisory 'freeze' signal when ambient
temperature falls below the detector rating. The maximum loop resistance limit for each IDC is
100 ohms. The field wiring for each zone is supervised for opens, shorts and ground faults (zero
impedance to ground). All conditions are visually and audibly annunciated.
Each circuit is configured for Style B (Class B) operation and will accept I
normally-open contact devices as well as conventional 2-wire or 4-wire, 24 VDC smoke detectors.
In addition, Zone 1 (IDC 1) on the SFP-2402 and Zone 2 (IDC2) on the SFP-2404 can be
programmed as combination supervisory and waterflow zones. Refer to the Notifier Device
Compatibility Document for a list of compatible devices.
SFP-2404 Initiating Device Circuits can be converted to Style D (Class A) by installing the
optional Class A Converter module. Refer to "CAC-4 Class A Converter Module (SFP-2404
only)" on page 24.
(refer to Device Compatibility Document for list of compatible relays)
Resettable 24 VDC
4-wire smoke
detector power
(500 mA maximum)
SFP-2402 & SFP-2404 Series Manual — P/N 51898:F3 8/6/2014
Class B Initiating Device Circuits (supervised and power-limited)
UL listed Power Supervision Relay
UL listed compatible 4-wire smoke detector
manual pull stations
heat detectors
Figure 2.4 IDC Connections
3 smoke detectors which generate a maintenance signal
4.7 K:, ½ watt resistor P/N:71252
Installation
smoke detectors, any
3
UL listed
compatible
2-wire smoke
detectors
Dummy load all
unused circuits - 4.7
K:, ½ watt resistor
(P/N: 71245)
Note: Zones 3 & 4 on
SFP-2404 only
19