Allen-Bradley MicroLogix 1400 Controller 1766-L32AWAA

Product Overview

The Allen-Bradley MicroLogix 1400 controller model 1766-L32AWAA offers 20 digital 120V AC inputs, 12 relay outputs, and 4 analog inputs plus 2 analog outputs. It includes an Ethernet port with DNP3, web server, and email capabilities. Two serial ports support DH485, DF1, Modbus RTU, DNP3, and ASCII protocols. The controller has 20 KB memory for user programs and data. You can expand it with up to seven 1762 I/O modules. It runs on 120-240V AC power and includes a built-in real-time clock.

Application Scenarios

This controller suits clean, dry industrial environments with circuits not exceeding Over Voltage Category II. It works well for micro and small automation systems. Typical applications include machine control, material handling, packaging, and building automation. The built-in Ethernet and serial ports allow easy integration with HMIs and SCADA systems. The 1766-L32AWAA supports DNP3 protocol for utility and water/wastewater applications. It can also serve as a remote terminal unit (RTU) in distributed control systems.

Technical Specifications

• Manufacturer: Rockwell Automation
• Brand: Allen-Bradley
• Part Number: 1766-L32AWAA
• Product Type: MicroLogix 1400 Controller
• Number of I/O: 32 (20 inputs, 12 outputs)
• Analog I/O: 4 inputs (0-10VDC), 2 outputs (0-10VDC)
• Input Voltage Range: 79-132V AC
• Output Type: Relay (5-125V DC / 5-264V AC)
• Operating Frequency: 47-63 Hz
• Power Consumption: 100 VA
• Communication Ports: 1 isolated RS232/RS485, 1 non-isolated RS232, 1 Ethernet
• Supported Protocols: DF1, ASCII, Modbus RTU, DNP3, DH485 (serial); Ethernet/IP, DNP3, Modbus TCP/IP (Ethernet)
• Memory: 20 KB (user programs and data)
• Optional Memory Module: 1766-MM1 (384 KB additional memory)
• Real-Time Clock: Built-in
• Dimensions: 3.5 x 7.08 x 3.43 in
• Weight: 2 lbs (0.91 kg)
• Mounting: Panel or DIN-rail
• Operating Temperature: 0-55°C

Installation & Maintenance Guide

Install the controller on a DIN rack or panel using the provided mounting slots. Ensure the enclosure is open for proper ventilation. Connect the power supply (120-240V AC) to the designated terminals. Wire the inputs and outputs according to the wiring diagram. Use appropriate fusing for output circuits. The controller has a battery-backed RAM for retaining programs. Replace the battery every few years. For memory backup, insert the 1766-MM1 memory module into the dedicated slot. This module provides 384 KB for storing user programs and data. It supports hot insertion but requires a power cycle to be recognized. The module also offers write protection and auto-recovery after a fault.

Packing List

Each 1766-L32AWAA controller includes one unit, a quick start guide, and a mounting kit. The 1766-MM1 memory module is sold separately. Shipping is via FedEx, UPS, or DHL.