Allen-Bradley 1771-IAD Digital AC/DC Input Module

Product Overview

The 1771-IAD is a discrete input module from Allen-Bradley. It belongs to the 1771 product family. This module accepts both AC and DC signals. It handles 120V AC or 125V DC input voltage. The module has sixteen input channels. It connects to pushbuttons, limit switches, and relays. The design is modular and space-saving. It uses a 1771-WH wiring arm for easy maintenance.

This module fits in many 1771 chassis. Examples include 1771-A1B through A4B. It also works with 1771-AM1 and AM2 chassis. The module provides 16 red status indicators. It has one green module active LED. The keying positions are between pins 10 and 12, and 14 and 16. This ensures correct slot placement.

Application Scenarios

Use the 1771-IAD in industrial automation systems. It interfaces discrete sensors and actuators. Common devices include pushbuttons, limit switches, and pilot lights. It also works with motor starters and annunciators. The module integrates into PLC-5 control systems. It supports 1/2, 1, and 2-slot I/O addressing. This flexibility makes it ideal for various manufacturing processes. Use it in assembly lines, packaging machines, and material handling.

Technical Specifications

• Number of Inputs: 16
• Voltage Category: 120V AC/DC
• Operating Voltage Range: 79-138V AC or DC
• Typical AC On Delay: 5 ms (+/- 3 ms)
• Typical DC On Delay: 3 ms (+/- 0.1 ms) or 10 ms (+/- 1 ms)
• Typical Off Delay: 25 ms (+/- 5 ms) for AC or DC
• Max AC Off-State Current: 2.8 mA
• Backplane Current: 195 mA at 5V
• Power Dissipation: 8.8W max, 1.0W min
• Thermal Dissipation: 30.1 BTU/hr max, 3.42 BTU/hr min
• Dimensions: 3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm)
• Wiring Arm: 1771-WH

Installation & Maintenance Guide

Install the module in a compatible 1771 chassis. Ensure keying bands are between correct pins. Use the 1771-WH wiring arm for field wiring. To replace the module, remove the wiring arm without disconnecting wires. This simplifies maintenance. The module supports series D and later. It works with 1/2, 1, and 2-slot addressing. Power down the chassis before insertion. Verify the backplane current does not exceed 195 mA.

For shipping, we use only FedEx, UPS, or DHL. This ensures fast and reliable delivery.

Packing List

Each order includes one Allen-Bradley 1771-IAD module. It comes with a 1771-WH wiring arm. No additional accessories are included. The package is secure for transit.