MicroLogix 1400 Controller Allen-Bradley 1766-L32BWA 32 I/O

Product Overview

The Allen-Bradley 1766-L32BWA is a MicroLogix 1400 controller. It offers 32 digital I/O points. These include 20 inputs and 12 relay outputs. The inputs split into 12 fast 24V DC and 8 normal 24V DC. The relay outputs handle various voltage levels. This controller integrates three communication ports. One combo RS232/RS485 port supports isolated communication. One RS232 port provides additional connectivity. One Ethernet port enables modern network integration. The controller runs on 100-240 VAC power. It includes 20 KB of user memory. A built-in real-time clock supports time-based control. The 1766-L32BWA supports up to seven 1762 expansion I/O modules.

Application Scenarios

This controller suits machine-level automation. It also works for small process control. The Ethernet port supports DNP3 and MODBUS TCP/IP. This makes it ideal for substation automation. The RS485 port can connect up to 32 MODBUS devices. Use it for power meter integration. The ASCII protocol reads barcode data in factories. The high-speed inputs handle fast switching at 100 kHz. This controller fits applications needing reliable sequencing and monitoring.

Technical Specifications

• Manufacturer: Rockwell Automation / Allen-Bradley
• Series: MicroLogix 1400
• Part Number: 1766-L32BWA
• Inputs: 20 digital (12 fast 24V DC, 8 normal 24V DC)
• Outputs: 12 relay
• Total I/O: 32 points
• Power Supply: 100-240 VAC, 47-63 Hz
• Power Consumption: 120 VA
• Memory: 20 KB user program/data
• Communication: 1 RS232/RS485 combo (isolated), 1 RS232, 1 Ethernet
• Protocols: DF1, ASCII, MODBUS RTU, DNP3 (serial and Ethernet), DH485, MODBUS TCP/IP
• High-Speed Counters: Up to 6 embedded (100 kHz)
• Real-Time Clock: Yes, built-in
• Expansion: Up to 7 x 1762 modules
• Mounting: Panel or DIN Rail
• Dimensions: 90 x 180 x 87 mm (3.5 x 7.09 x 3.43 in)
• Weight: 0.9 kg (2 lbs)
• Enclosure: Open type
• Operating Environment: Clean, dry, Over Voltage Category II

Installation & Maintenance Guide

Mount the controller on a panel or DIN rail. Use the provided slots. Ensure proper ventilation. Connect power to the 100-240 VAC terminals. Use wire size 22 to 14 AWG. Attach I/O wiring per the user manual. The Ethernet port uses standard cables up to 30 meters. For serial ports, use shielded cables. The controller supports online editing. You can insert or remove the 1766-MM1 memory module under power. However, the module will only be recognized after a power cycle. The battery-backed RAM retains data during power loss. Replace the battery as needed. Keep the environment within 0 to 55 degrees Celsius. Avoid moisture and dust.

Packing List

• 1 x Allen-Bradley 1766-L32BWA MicroLogix 1400 Controller
• 1 x User Manual (digital or printed)
• Mounting hardware and connectors