Mircom MIX-100X Fault Isolator Module

The Mircom MIX-100X Fault Isolator Module is designed to protect compatible Mircom addressable fire alarm systems against wire-to-wire short circuits on the analog loop. When installed between groups of addressable sensors or modules, it helps isolate a fault while allowing unaffected portions of the loop to continue operating.

As part of Mircom’s MIX-100 Series Alpha devices, the MIX-100X provides an important layer of circuit protection for addressable fire alarm installations. Its loop-powered design, low current consumption, and automatic short-circuit isolation make it suitable for commercial and institutional fire alarm systems.

Short-Circuit Fault Isolation

The primary function of the Mircom MIX-100X is to detect and isolate short circuits on an addressable loop. Modules can be positioned between groups of sensors or other addressable devices to limit the portion of the circuit affected by a wiring fault.

If a short circuit occurs between two isolator modules, the isolators switch to an open-circuit condition. As a result, the devices located between those isolators are separated from the remaining loop.

Maintains Loop Operation

One of the main advantages of the MIX-100X is its ability to help keep unaffected devices operational during a short-circuit condition.

When properly configured in a Class A / Style 6 circuit, a short between isolators can be separated from the rest of the loop. The remaining devices can then continue operating normally.

This capability is especially valuable in larger addressable fire alarm systems where a single wiring fault should not disable the entire signaling loop.

Key Features

• Fault isolator module for addressable fire alarm loops
• Automatically isolates wire-to-wire short circuits
• Helps unaffected loop devices remain operational
• Low 35 µA current consumption at 24 V
• Maximum line current of 1A
• 16–28 VDC operating range
• White polycarbonate construction
• Designed for compatible Mircom addressable systems

Low Current Loop-Powered Design

The Mircom MIX-100X is loop-powered and has a specified current consumption of only 35 µA at 24 V. Mircom also specifies a maximum line current of 1 amp and line resistance of 0.2 ohm for the module.

The MIX-100 Series documentation lists an operating voltage range of 16–28 VDC. Therefore, the module integrates directly into compatible addressable fire alarm loop configurations without requiring a separate operating power supply.

Isolator Placement and Capacity

Proper placement of fault isolator modules is important for maintaining circuit protection. Mircom documentation specifies that the total address-count value of devices located between isolators cannot exceed 20. In addition, up to 40 isolator modules can be installed on the addressable loop.

These requirements should be considered when designing or servicing a compatible Mircom addressable system.

Compact Module Design

The MIX-100X has a compact footprint suitable for professional fire alarm installations. Mircom specifies dimensions of approximately 4.0 inches wide × 4.0 inches high × 1.3 inches deep, with a weight of approximately 3.0 oz. (85.8 g).

Its white polycarbonate construction provides a clean appearance while matching other devices within the MIX-100 Series.

Commercial Fire Alarm Applications

Typical applications may include office buildings, schools, healthcare facilities, hotels, commercial properties, and institutional buildings.

By separating groups of addressable devices with fault isolators, system designers can reduce the number of devices affected by a single loop short circuit.

System Compatibility

Before using the MIX-100X, technicians should verify compatibility with the specific Mircom fire alarm control panel and addressable loop configuration. The isolator is polarity sensitive, so correct loop wiring is important for proper operation.

Therefore, availability and compatibility should be verified when sourcing the module for an existing system.

Overall, the Mircom MIX-100X Fault Isolator Module provides effective short-circuit protection for compatible Mircom addressable fire alarm loops. Its automatic fault isolation, low current consumption, and ability to help maintain operation of unaffected devices make it a useful component for maintaining addressable loop reliability.

MIX-100X Datasheet