Allen-Bradley 1746-FIO4I SLC 500 Fast Analog I/O Module

Product Overview

The Allen-Bradley 1746-FIO4I is a fast analog combination I/O module for the SLC 500 family. It packs 2 differential input channels and 2 current output channels into a single-slot module, combining analog input and output functions where expansion space is limited. The module weighs approximately 0.2 kg (0.44 lb).

Technical Specifications

Accuracy Ratings

Analog input accuracy: ±0.440% of full scale at 25°C, ±0.750% at 60°C. Analog output accuracy: ±0.298% of full scale at 25°C, ±0.541% across 0–60°C. Maximum absolute input: ±7.5V DC or 7.5V AC RMS, 0–30 mA.

Engineering Advantages

Combining 2 inputs and 2 outputs in a single slot saves rack space in space-limited installations. Fast 7.5 µs conversion captures rapidly changing variables. The 7 kHz bandwidth handles dynamic signals beyond standard analog modules. At roughly 0.2 kg, the module adds minimal weight to the chassis. Screw-terminal connections accept up to 14 AWG shielded cable for noise immunity.

Technical FAQs

Q1: How many channels does the 1746-FIO4I provide?
A1: 2 differential analog inputs (0–10VDC / 0–20mA) and 2 current outputs (0–20mA).

Q2: What is the resolution and conversion speed?
A2: 12-bit input and 14-bit output resolution, converting in 7.5 µs every 512 µs.

Q3: What cable is recommended for wiring?
A3: Shielded Belden #8761 with wire size up to 2.5 mm² (14 AWG).