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  • Kidde | Intelligent SLC Fault Isolator Module for Class A Loops, Rotary Addressed | GSA-IM2
Intelligent SLC Fault Isolator Module for Class A Loops, Rotary Addressed
Kidde Commercial

Intelligent SLC Fault Isolator Module for Class A Loops, Rotary Addressed

SKU KD-GSA-IM2

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The Kidde GSA-IM2 Intelligent SLC Fault Isolator Module prevents a single wire-to-wire short from taking down an entire Class A Signaling Line Circuit. Install one between SLC segments and the module automatically isolates the fault - keeping the rest of the loop operational while you locate and fix the problem.

Built for the commercial installer

Rotary-addressed with dual rotary switches (TENS and ONES), the GSA-IM2 uses the same familiar addressing method as every other Kidde intelligent device on the loop. It draws just 175 µA in standby, mounts in a standard 4-inch square electrical box, and works with all KIR detectors and FX modules. Standard 12-18 AWG wiring - no twisted or shielded cable required.

Key features

  • Automatic fault isolation: monitors SLC line voltage and opens the circuit when a wire-to-wire short is detected, isolating the fault between the two nearest isolator modules
  • Protects Class A loop integrity: keeps the rest of the SLC operational during a wiring fault so other devices continue reporting to the FACP
  • Precise ground fault detection: pinpoints the specific module location where the wiring problem occurred, cutting troubleshooting time
  • Low SLC current draw: 175 µA standby, 200 µA activated - minimal impact on loop loading calculations
  • Standard mounting: fits North American 4-inch square x 2-1/2 in. deep 2-gang box or standard 4 in. square box 1-1/2 in. deep
  • Compatible with all KIR detectors and FX modules on Kidde intelligent fire alarm systems

System requirements

Requires a Kidde FX Series intelligent fire alarm control panel with an available SLC device address. Supports both 64-point (addresses 01-64) and 1000-point (addresses 01-127) panel configurations.

Specifications

SKUKD-GSA-IM2
BrandKidde Commercial
Form factorSLC loop isolator module, surface mount
CommunicationSLC (Signaling Line Circuit), rotary addressed
Power inputPowered by SLC loop (no external power required)
SLC current drawStandby: 175 µA / Activated: 200 µA
Communication line voltageMaximum 20 V peak-to-peak
Ground fault impedance10 kΩ
Max circuit resistance between isolators6 Ω
Module address range01-64 (64-point panels) / 01-127 (1000-point panels)
Wire size12, 14, 16, or 18 AWG
Compatible devicesAll KIR detectors and FX modules
Operating temp32°F to 120°F (0°C to 49°C)
Operating humidity0 to 93% RH, noncondensing at 90°F (32°C)
Storage temp-4°F to 140°F (-20°C to 60°C)
Mounting4 in. square x 2-1/2 in. deep 2-gang box or standard 4 in. square box 1-1/2 in. deep
Ship weight0.50 lbs (0.23 kg)

Documents and resources

FAQs

How does the isolator module protect the SLC loop?
Monitors SLC line voltage. On a wire-to-wire short, it opens the circuit between the two nearest isolator modules, isolating the fault. The rest of the SLC keeps operating and other devices continue reporting to the FACP.
How many isolator modules do I need on a Class A loop?
NFPA 72 requires enough isolators so a single fault doesn't disable more devices than your design allows. Common practice: one per floor or fire zone. Max circuit resistance between isolators is 6 ohms.
What control panels is the GSA-IM2 compatible with?
The GSA-IM2 works with Kidde FX Series intelligent fire alarm control panels. It supports 64-point panels (addresses 01-64) and 1000-point panels (addresses 01-127). Compatible with all KIR detectors and FX modules on the SLC loop.
Does the isolator module require external power?
No. The GSA-IM2 draws power directly from the SLC loop - 175 µA in standby, 200 µA when activated. No separate power supply or auxiliary wiring needed.
What wire gauge does the GSA-IM2 accept?
Standard 12, 14, 16, or 18 AWG wire. No twisted or shielded cable required. Uses the same wiring as the rest of your SLC devices.
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