Kidde | Analog Addressable SLC Fault Isolator Module for FX Series Fire Alarm Systems | FX-ISO

The FX-ISO keeps the SLC loop online when a wire-to-wire short would otherwise take down the entire circuit. It monitors line voltages continuously and opens the loop at the fault point, isolating the short between the two nearest isolator modules while the rest of the system stays fully operational. One address per module, set with a screwdriver on the front-face rotary switches.

Built for the fire alarm installer

Drop the FX-ISO into any Kidde FX Series intelligent fire alarm system using standard SLC wiring. No additional power supply, no special cable - the module draws directly from the SLC loop at 175 A standby. Address it via the rotary TENS and ONES dials, wire to P1 and P2 screw terminals, and mount on a standard 4" square electrical box. Compatible with all KIR detectors and FX modules on the loop. UL Listed.

Key features

• Automatic fault isolation: detects wire-to-wire shorts and isolates the faulted SLC segment without taking down the rest of the Class A loop
• Loop-powered operation: no auxiliary power supply required - draws directly from the SLC at 175 A standby, 200 A activated
• Rotary address switches: set TENS (0-12) and ONES (0-9) with a screwdriver for up to 127 addresses on a 1000-point panel
• Bicolor LED status: flashing green for normal operation, flashing red when actively isolating a fault
• Standard box mounting: fits 4" square x 2-1/2" deep 2-gang box or standard 4" square box 1-1/2" deep
• Universal FX compatibility: works with all KIR detectors and FX modules on the SLC loop

System requirements

Requires a Kidde FX Series intelligent fire alarm control panel (64-point or 1000-point). Install on a Class A SLC loop with maximum circuit resistance of 6 ohms between isolator modules. Wire with 12-18 AWG (16 and 18 AWG preferred) per NFPA 72 and CAN/ULC-S524.