Flex 402 & Flex 404 Instruction Manual — P/N 52194:D4 3/27/2015 19
Input Circuits Installation
2.3 Input Circuits
The Flex 402 has two IDCs (Initiating Device Circuits) and the Flex 404 has four IDCs. Each
circuit is compatible with System Sensor’s i
3
smoke detectors which generate a maintenance signal
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
3
smoke detectors, any
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 Flex 402 and Zone 2 (IDC2) on the Flex 404 can be
programmed as combination supervisory and waterflow zones. Refer to the Gamewell-FCI Device
Compatibility Document for a list of compatible devices.
Flex 404 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 (Flex 404 only)” on
page 24.
Figure 2.4 IDC Connections
Class B Initiating Device Circuits (supervised and power-limited)
4.7 KΩ, ½ watt resistor P/N:71252
UL listed
compatible
2-wire smoke
detectors
manual pull stations
heat detectors
Dummy load all
unused circuits - 4.7
KΩ, ½ watt resistor
(P/N: 71245)
Note: Zones 3 & 4 on
Flex 404 only
ms-4idc.wmf
UL listed Power Supervision Relay
(refer to Device Compatibility Document for list of compatible relays)
Resettable 24 VDC
4-wire smoke
detector power
(500 mA maximum)
UL listed compatible 4-wire smoke detector
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