OVERVIEW

Official designation: Allen-Bradley 1746-FIO4I (SLC 500, Fast Analog I/O Module)

The 1746-FIO4I is a high-speed analog module for the SLC 500, featuring 2 differential inputs and 2 current outputs. It is designed for applications requiring rapid input conversion times as low as 7.5 microseconds.

KEY SPECS SUMMARY

Power: 5V DC @ 150 mA, 24V DC @ 150 mA

Interfaces / Ports: Removable terminal block

Indicators: N/A

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: SLC 500, 1746 I/O chassis

Limit: 2 inputs (12-bit), 2 outputs (14-bit)

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the configurable input signal types and resolutions available on the 1746-FIO4I module?

A: It supports 0–20 mA or 0–10V DC inputs with a 12-bit resolution.

Wiring & Installation:

Q: Is external power required for the field devices connected to the 1746-FIO4I outputs?

A: Yes, external 24V DC power is typically required to drive the 0–20 mA current outputs.

Troubleshooting & Compatibility:

Q: What diagnostic feature does the 1746-FIO4I module use to report status since it lacks external LEDs?

A: Diagnostic information, including module faults, is communicated via status bits in the processor image table.

Replacement & Upgrades:

Q: Are there any direct replacements for the 1746-FIO4I module that retain its fast 7.5 microsecond conversion speed?

A: Refer to the latest manufacturer manual for the recommended replacement modules in modern platforms.