A-B 1492-IFM40F-FS-2 Interface Module

Allen-Bradley 1492-IFM40F-FS-2 Interface Module (40-Point Fusible I/O Interface Module)

 

 

Product Description

The Allen-Bradley 1492-IFM40F-FS-2 is a PLC interface wiring module (I/O termination module) used to connect Rockwell PLC I/O modules (such as 1756 / 1771 / 1746 / 1794 systems) to field devices through a pre-wired, high-density 40-point interface system.

It is part of the Bulletin 1492 I/O wiring system, designed to simplify PLC cabinet wiring, reduce wiring errors, and improve maintenance efficiency.

Specifications

• Brand: Allen-Bradley (Rockwell Automation)
• Model: 1492-IFM40F-FS-2
• Series: Bulletin 1492 Interface Module
• Type: 40-point fusible interface module
• Contacts: 40-pin system interface
• Current rating: 12 A
• Mounting: DIN rail (35 mm)
• Function: PLC I/O wiring termination + fuse protection
• Connection type: Pre-wired cable system (PLC side) + screw terminal field wiring

What it actually does

This module is used as an intermediate wiring interface between PLC I/O cards and field devices.

It:

• Routes PLC I/O signals to terminal blocks
• Provides fuse protection per channel (depending configuration)
• Allows quick replacement without rewiring PLC I/O cards
• Reduces cabinet wiring complexity

System Role (Simple)

PLC I/O module (1756 / 1746 / 1771 etc.)
→ pre-wired ribbon cable
→ 1492-IFM40F-FS-2 interface module (this unit)
→ fuses + terminal points
→ field devices (sensors, coils, valves, etc.)

So it acts like a “wiring bridge + protection interface”.

Key Features

• 40-point high-density wiring interface
• DIN rail mounting for control cabinets
• Fusible protection design (FS version)
• Pre-wired cable compatibility (Rockwell I/O systems)
• Reduces wiring time and human error
• Modular replacement (no rewiring of PLC side)
• Industrial-grade terminal construction

Typical Applications

• PLC control cabinets
• Factory automation panels
• Motor control centers (MCC)
• Process control systems
• Packaging machinery
• Large I/O distributed wiring systems

Advantages

• Fast PLC I/O wiring installation
• Reduced maintenance time
• Improved wiring safety (fuse protection)
• Clean and organized cabinet layout
• Easy module replacement without disturbing PLC cards
• Standardized Rockwell wiring system integration

Important Notes

• Not PLC CPU ❌
• Not I/O module ❌ (it is a wiring interface only)
• Not power supply ❌
• Not communication module ❌
• It is a PLC I/O termination / interface wiring module ✔

Precautions

• Must match correct Rockwell I/O cable system
• Incorrect wiring can damage field devices or PLC I/O cards
• Fuse rating must match load requirements
• Ensure proper grounding and cable shielding in cabinet
• Not a standalone functional control device