Allen-Bradley 1762-IA8 MicroLogix 8‑Point AC Input Module

June 11, 2026 • 2 min read • wayne • Guide

Product Summary

The 1762-IA8 is a compact 8‑point AC input module from the Bulletin 1762 MicroLogix expansion series. It accepts 100–120VAC inputs and extends I/O capabilities for MicroLogix 1200 controllers. Its rackless design simplifies replacement and reduces inventory costs.

Theme A: Procurement & Buyer Guide

Engineers and procurement managers choose the 1762-IA8 to add reliable AC sensing to their MicroLogix 1200 system. This module provides eight digital inputs in one common group. It operates across a voltage range of 79–132VAC at 47–63 Hz. The module draws only 50 mA from the 5VDC bus (0.25 Watts). Its maximum inrush current is 250 mA.

The module’s compact dimensions (3.5 x 3.4 x 1.5 inches) and light weight (0.46 lb) allow flexible placement. It mounts horizontally on a panel or on a DIN rail. You can install up to six modules away from the host power supply. This distance rating simplifies cabinet layout.

All wiring uses a single group of eight inputs (0–7) with internally connected commons. The maximum On/Off signal delay is only 20 ms. This ensures fast response for machine control. The unit carries UL 508, C‑UL, and CE certifications. It suits dry, clean environments and Over Voltage Category II circuits.

Theme B: Step‑by‑Step User & Installation Guide

Mount the 1762-IA8 on a DIN rail or use two mounting screws for panel installation. Align the module horizontally. Ensure you place it at least six module widths from the main power supply. This spacing prevents electrical noise.

Connect the 100–120VAC field wiring to the input terminals. Each input shares a common return. Wire each sensor to the appropriate input point. The module accepts signals from 79 to 132VAC. Verify the frequency matches 47–63 Hz.

Power the module via the MicroLogix backplane. Check the bus current draw stays within the 50 mA limit at 5VDC. After wiring, power up the controller. Monitor the input status LEDs for each channel. The 20 ms delay ensures reliable filtering of noisy signals.

For maintenance, inspect connections annually. Keep the enclosure clean and dry. Never exceed Over Voltage Category II. Replace the module by sliding it off the DIN rail and swapping the wiring.