Kidde | FX-ISO Analog SLC Fault Isolator Module for Class A (Style 7) Loop Protection | GSA-IM

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SKU:: KD-GSA-IM

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The Kidde FX-ISO protects Class A SLC loops from total collapse when a wire-to-wire short hits the circuit. Instead of losing the entire loop, the module isolates the fault between the two nearest isolator modules, keeping every device outside that segment online and reporting. Rotary-addressed and compatible with all Kidde FX Series intelligent fire alarm control panels.

Built for the fire alarm installer

Drop the FX-ISO into any standard 4-inch square electrical box on the SLC loop. One device address per module, set via the familiar rotary switches on the front. The module monitors line voltages continuously and opens the SLC automatically when a short is detected - no panel programming needed to enable isolation. Ground fault detection pinpoints wiring problems down to the specific module location, cutting troubleshooting time on Class A (Style 7) circuits.

Key features

Automatic fault isolation: opens the SLC at the two nearest isolator modules when a wire-to-wire short is detected, preventing full loop collapse
Rotary switch addressing: set via screwdriver-adjustable TENS and ONES switches, supports addresses 01-64 (64 point) or 01-127 (1000 point panels)
Bicolor LED status: flashing green for normal, flashing red for active/isolated condition
Standard electrical box mounting: fits North American 4-inch square x 2-1/2 in. deep 2-gang box or standard 4 in. square 1-1/2 in. deep box
Low SLC current draw: 175 μA standby, 200 μA activated - minimal impact on loop power budget
Compatible with all KIR detectors and FX modules on the Kidde intelligent fire alarm system

System requirements

Requires a Kidde FX Series intelligent fire alarm control panel. Install on Class A (Style 7) SLC loops per NFPA 72 and CAN/ULC-S524. Accepts 12, 14, 16, or 18 AWG wire (16 and 18 AWG preferred).

Brand:

Kidde Commercial

Form factor:

SLC fault isolator module, rotary addressed

Communication:

SLC (Signaling Line Circuit), max 20V peak-to-peak

Current draw:

Standby: 175 μA | Activated: 200 μA

Ground fault impedance:

10 kΩ

Max circuit resistance between isolators:

6 Ω

Operating temp:

32 to 120°F (0 to 49°C)

Operating humidity:

0 to 93% RH, noncondensing at 90°F (32°C)

Storage temp:

-4 to 140°F (-20 to 60°C)

Mounting:

4 in. square x 2-1/2 in. deep 2-gang box or standard 4 in. square 1-1/2 in. deep box

Wire size:

12, 14, 16, or 18 AWG (16 and 18 AWG preferred)

Module address range:

01-64 (64 point panel) or 01-127 (1000 point panel)

Compatibility:

All KIR detectors and FX modules; Kidde FX Series intelligent control panels

LED indicator:

Bicolor - flashing green (normal), flashing red (active/isolated)

Kidde model:

FX-ISO

How many isolator modules do I need on a Class A loop?

Place one isolator module between each group of devices you want to protect independently. If a short occurs, only the segment between the two nearest isolator modules is isolated. Consult NFPA 72 and local codes for minimum placement requirements.

Does the FX-ISO work with all Kidde FX Series panels?

Yes. The FX-ISO is compatible with all Kidde FX Series intelligent fire alarm control panels, including both 64-point and 1000-point panel configurations.

What happens when the module detects a short circuit?

The FX-ISO automatically opens the SLC to isolate the shorted segment. The bicolor LED switches from flashing green to flashing red. All devices outside the isolated segment continue operating normally on the loop.

What electrical box does the FX-ISO mount in?

Standard North American 4-inch square x 2-1/2 in. deep 2-gang box, or a standard 4 in. square box 1-1/2 in. deep.

Does this module require its own power supply?

No. The FX-ISO draws power directly from the SLC loop at 175 μA standby and 200 μA activated. No external power source needed.

Spec Sheet

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