System Sensor ISO-6 Six Fault Isolator Module

The System Sensor ISO-6 Six Fault Isolator Module is an intelligent signaling line circuit (SLC) isolation module designed to improve the reliability and survivability of addressable fire alarm systems. The System Sensor ISO-6 provides six independent Class B fault isolator circuits that automatically isolate short circuits on the communication loop while allowing unaffected portions of the SLC to continue operating. Therefore, it minimizes system downtime and helps maintain life safety protection during wiring faults.

System Sensor ISO-6 Function

The System Sensor ISO-6 continuously monitors each signaling line circuit for short-circuit conditions. As a result, when a wiring fault occurs, the affected circuit automatically opens and isolates the fault while allowing all remaining devices on the loop to continue normal communication. Once the short circuit is removed, the module automatically restores the isolated circuit without requiring manual intervention.

Six Independent Class B Isolator Circuits

The ISO-6 incorporates six independent fault isolation circuits, allowing multiple sections of an addressable SLC loop to be protected within a single module. Consequently, installers can reduce hardware requirements while improving overall system reliability. Moreover, the module supports up to 25 addressable devices between isolators, making it ideal for large commercial fire alarm systems.

Automatic Short Circuit Isolation

The ISO-6 functions as an automatic electronic switch that opens whenever line voltage drops below approximately 4 volts, indicating a short-circuit condition. Therefore, only the affected section of the communication loop is isolated while all remaining devices continue to operate normally. Furthermore, automatic restoration occurs immediately after the wiring fault has been corrected.

Individual LED Status Indicators

Each of the six isolation circuits includes an amber LED status indicator that flashes during normal operation and remains illuminated whenever a short circuit is isolated. As a result, maintenance personnel can quickly identify the location of wiring faults during troubleshooting. Additionally, removable plug-in terminal blocks simplify installation and future service.

Flexible Cabinet Mounting

The System Sensor ISO-6 is designed for cabinet installation using compatible mounting hardware. It can be installed individually or grouped within optional enclosures such as the BB-2 cabinet or BB-6 cabinet with CH-6 chassis, allowing multiple isolator modules to be housed in a single enclosure. Consequently, installers have flexibility when designing both small and large addressable fire alarm systems.

Technical Specifications

• Model: ISO-6
• Type: Six Fault Isolator Module
• Manufacturer: System Sensor
• Circuit Type: Six Independent Class B Isolator Circuits
• Operating Voltage: 15–32 VDC
• Standby Current: 450 µA Per Circuit (2.7 mA Total)
• Maximum Isolation Current: 17 mA Per Circuit (102 mA Maximum)
• Automatic Fault Isolation: Yes
• Automatic Circuit Restoration: Yes
• Fault Detection Threshold: Approximately 4 VDC
• Status Indicators: Six Amber LEDs
• Wiring Terminals: Removable 12–18 AWG Plug-In Terminal Blocks
• Operating Temperature: 32°F to 120°F (0°C to 49°C)
• Humidity: 10–93% Non-Condensing
• Dimensions: 6.8″ H × 5.8″ W × 1.0″ D
• Mounting Options: BB-2 Cabinet, BB-6 Cabinet with CH-6 Chassis
• Listings: UL Listed, FM Approved, CSFM Listed
• Application: Addressable Fire Alarm Signaling Line Circuit Protection

Applications

The System Sensor ISO-6 Six Fault Isolator Module is ideal for:

• Addressable fire alarm systems
• Signaling line circuit (SLC) protection
• Commercial office buildings
• Hospitals and healthcare facilities
• Educational institutions
• Hotels and hospitality properties
• Government buildings
• Industrial facilities
• High-rise buildings
• Large campus fire alarm systems

Reliable SLC Fault Isolation Solution

The System Sensor ISO-6 Six Fault Isolator Module combines six independent Class B isolation circuits, automatic short-circuit protection, LED diagnostics, and automatic circuit restoration in a compact cabinet-mounted module. Overall, it enhances the reliability of addressable fire alarm systems by isolating wiring faults while allowing the remainder of the signaling line circuit to remain fully operational, improving system uptime and life safety performance.

ISO-6