1492-IFM20F-F24A-2 | Allen-Bradley 1492 Wiring System Fusible Interface Module

Product Description

The 1492-IFM20F-F24A-2 is a professional-grade digital interface module designed to bridge programmable controller I/O to field devices with integrated circuit protection. Part of the Allen-Bradley 1492 wiring system, this unit utilizes a 20-pin header to facilitate rapid, error-free connectivity. It features built-in fuse holders for each circuit, ensuring that individual field faults are isolated without compromising the entire controller rack.

Engineered for versatility, the 1492-IFM20F-F24A-2 supports a broad operational voltage range and includes nominal 2.4 mA indicator circuits for real-time status monitoring. The module's compact architecture is optimized for high-density DIN rail mounting, providing a robust termination point that simplifies troubleshooting and field maintenance.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 1492-IFM20F-F24A-2

• Wiring System Category: Fusible Digital Interface Module

• I/O Capacity: 20-pin connection interface

• Operational Voltage: 10 to 30 V AC/DC

• Current Rating (Per Circuit): 2 Amps maximum

• Current Rating (Per Module): 12 Amps aggregate maximum

• Status Indication: Integrated LED indicator circuit (2.4 mA nominal)

• Physical Profile: 7.02 cm x 11.00 cm x 8.31 cm

• Weight: Approximately 2.0 kg (Shipping weight)

• Mounting Type: Standard 35mm DIN rail

Engineering FAQ

What is the primary benefit of the "F" designation in the 1492-IFM20F-F24A-2?The "F" indicates that the module is fusible. Unlike standard feed-through modules, the 1492-IFM20F-F24A-2 provides per-channel overcurrent protection, which is essential for protecting expensive PLC output cards from field-side short circuits.

How does the indicator circuit assist in maintenance?The onboard indicators draw a nominal 2.4 mA to provide visual confirmation of circuit activity or fuse failure. This allows technicians to perform rapid visual inspections of I/O status without needing to probe terminals manually.

Comparison with 1492-IFM40F Series

While both series offer fusible protection, the 1492-IFM20F-F24A-2 is designed for 20-pin I/O configurations, whereas the 40F series handles higher-density 40-pin requirements. This 20-pin version is specifically tuned for smaller I/O groups or applications where modularity and physical separation of signals are prioritized.