OVERVIEW

Official designation: Allen-Bradley 1492-IFM40DS24-4 (Bulletin 1492, Digital Interface Module)

Role/Application: A 40-point isolated digital interface module used for high-density, pre-wired connection between PLC I/O and field devices, featuring four terminals per output point.

KEY SPECS SUMMARY

Power: 10 to 60 V AC/DC range

Interfaces / Ports: 40-pin cable connector

Indicators: 24/48 V AC/DC LEDs

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: DIN rail mountable, 1756/1746/1771 I/O

Limit: 2 Amp per circuit, 12 Amp per module

Lifecycle: Current Product

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum current rating for a single circuit on this interface module?

A: The module supports a maximum continuous current of 2 Amp per circuit.

Wiring & Installation:

Q: How many terminals are provided for field-side wiring on each I/O connection?

A: The module provides four terminals per I/O connection, including isolated extra terminals for outputs.

Troubleshooting & Compatibility:

Q: What is the purpose of the 24/48 V AC/DC LED indicators on the module?

A: The LEDs provide field-side troubleshooting by indicating the on/off status of the output circuit.

Replacement & Upgrades:

Q: Is this interface module compatible with both Bulletin 1756 and Bulletin 1746 I/O platforms?

A: Yes, this module is broadly compatible with Bulletin 1756, 1746, and 1771 I/O modules.