Input Circuits
Installation
GF505 & GF510 Series PN 53164:A 3/26/2007
25
2.3 Input Circuits
The GF505 has five IDCs (Initiating Device Circuits) and the GF510 has ten 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 of approximately 45
o
F. The maximum loop resistance limit for each IDC
is 100 ohms. The maximum number of detectors per zone is 25. The field wiring for each zone is
supervised for opens, shorts and ground faults. 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.
Refer to the Gamewell-FCI Device Compatibility Document for a list of compatible devices.
Initiating Device Circuits can be converted to Style D (Class A) by installing the optional Class A
Converter module. Refer to "CAC-5X Class A Converter Module" on page 32.
Figure 2.5 IDC Connections
Class B Initiating Device Circuits (supervised and power-limited) 4.7 K
Ω
, 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 K
Ω
, ½ watt
resistor (P/N: 71245)
m
s-10U
Didc.cdr
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
