Edwards FX-ISO Analog SLC Fault Isolator Module

The Edwards FX-ISO Analog SLC Fault Isolator Module is an intelligent addressable module designed to protect Class A signaling line circuits (SLCs) from wire-to-wire short circuits. The Edwards FX-ISO Fault Isolator Module continuously monitors the communication loop and automatically isolates faulted sections when a short circuit occurs. Therefore, it helps maintain communication with unaffected devices and improves overall fire alarm system reliability.

Edwards FX-ISO Fault Isolator Module Function

The Edwards FX-ISO is specifically designed to prevent total SLC failure caused by wiring faults. As a result, a short circuit on one section of the loop does not disable the entire system. In addition, the module automatically opens the signaling line circuit when a short is detected and restores normal operation once the fault is cleared.

Class A SLC Protection

The FX-ISO protects Class A signaling line circuits by isolating faulted sections between the two isolator modules closest to the short circuit. Consequently, communication is maintained with devices outside the affected section. Moreover, this protection improves system survivability and helps ensure continued fire alarm operation during wiring faults.

Intelligent Addressable Communication

The module operates as an addressable device on compatible FireworX and Edwards analog fire alarm systems. Therefore, each isolator module is individually addressed using onboard rotary switches. Furthermore, addressable operation simplifies system diagnostics and maintenance.

Automatic Fault Isolation

The FX-ISO continuously monitors SLC voltage conditions. As a result, the module can rapidly identify and isolate wire-to-wire short circuits before they affect the entire loop. Additionally, automatic fault isolation reduces downtime and helps maintain system integrity.

LED Status Indication

The module includes a bi-color LED indicator for visual status monitoring. Consequently, technicians can quickly identify module operation during testing and maintenance. The LED indications include:

• Green Flashing: Normal Operation
• Red Flashing: Active / Fault Isolation Condition

This visual feedback simplifies troubleshooting and service procedures.

Easy Installation

The Edwards FX-ISO mounts in a standard 4-inch square electrical box and utilizes rotary address switches for simple configuration. Therefore, installation is straightforward for both new construction and retrofit applications. Furthermore, the compact design minimizes cabinet and wall space requirements.

Technical Specifications

• Model: FX-ISO
• Type: Analog SLC Fault Isolator Module
• Communication Line Voltage: Maximum 20.6 V Peak-to-Peak
• Standby Current: 175 μA
• Activated Current: 200 μA
• Maximum Circuit Resistance Between Isolators: 6 Ω
• Operating Temperature: 32°F to 120°F (0°C to 49°C)
• Humidity: 0–93% RH Non-Condensing
• Address Range:
  • 01–64 (64-point systems)
  • 01–127 (127-point systems)
• Mounting: Standard 4-inch Square Electrical Box
• Wire Size: 12–18 AWG
• Application: Class A SLC Protection

Applications

The Edwards FX-ISO Fault Isolator Module is ideal for:

• FireworX fire alarm systems
• Class A signaling line circuits
• Commercial office buildings
• Educational facilities
• Healthcare environments
• Industrial facilities
• Large addressable fire alarm networks

Reliable SLC Fault Protection Solution

The Edwards FX-ISO Analog SLC Fault Isolator Module combines automatic short-circuit isolation, intelligent addressable communication, and dependable Class A loop protection in a compact design. Overall, it enhances fire alarm system reliability by helping maintain communication and operation during wiring fault conditions.

FX-ISO Datasheet