Product Introduction
The Allen-Bradley 1766-L32BWA is a MicroLogix 1400 Controller from the Bulletin 1766 family. Designed for small to medium automation tasks, this compact PLC combines integrated I/O with versatile communication ports. It replaces older MicroLogix 1100 controllers while adding enhanced features like an embedded real-time clock and expanded memory.
When upgrading legacy systems, the 1766-L32BWA offers seamless migration with its 20 KB memory, support for up to seven 1762 expansion modules, and multiple protocol support. Whether you need to modernize a machine line or deploy new control points, this controller delivers reliability and flexibility.
Technical Specifications Breakdown
The Allen-Bradley 1766-L32BWA provides 32 discrete I/O points: 20 digital inputs (12 fast 24V DC, 8 normal 24V DC) and 12 relay outputs. Key specifications include:
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Operating Power: 110–240V AC (100–240V AC input)
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Power Consumption: 120 VA; inrush current 25A at 120V AC for 8 ms, 40A at 240V AC for 4 ms
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Memory: 20 KB for user programs and data
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Communication Ports: 1 isolated RS232/RS485, 1 RS232, 1 Ethernet (supports Ethernet/IP, DNP3, Modbus TCP/IP)
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Weight: 2 lbs; Dimensions: 90 x 180 x 87 mm (3.5 x 7.087 x 3.43 in)
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Mounting: Panel or DIN Rail
The relay outputs handle various voltage categories, making the 1766-L32BWA adaptable to different loads. High-speed inputs support 100 kHz switching for fast devices.
Industry Applications
Ideal for machine-level automation, the Allen-Bradley 1766-L32BWA is commonly used in:
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Packaging Lines: Integrated high-speed counters for label registration and conveyor synchronization.
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Water Treatment: DNP3 protocol enables communication with remote telemetry units (RTUs) for pump control.
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Material Handling: Modbus RTU over RS485 allows daisy-chaining up to 32 devices like sensors and drives.
In each application, the 1766-L32BWA simplifies networking through its isolated serial port and Ethernet connectivity.
Installation & Setup Guidance
Mount the 1766-L32BWA on a DIN rail or panel using the integrated slots. Use wire sizes 22 to 14 AWG for power and I/O connections. The controller requires 100–240V AC at 47–63 Hz. For communication, connect the combo RS232/RS485 port to Modbus networks using twisted-pair cable up to 30 meters. The Ethernet port supports linear topology with standard patch cables.
When replacing an older MicroLogix controller, back up the existing program using RSLogix 500 software, then download it to the 1766-L32BWA after adjusting I/O mapping if needed.
Compatibility & Integration
The Allen-Bradley 1766-L32BWA supports multiple protocols: serial DF1, ASCII, Modbus RTU, DNP3, and DH485; Ethernet Ethernet/IP, DNP3, and Modbus TCP/IP. It integrates with Rockwell Automation's RSLogix 500 and Connected Components Workbench software. Expansion I/O modules (1762 series) add up to 256 additional I/O points. The embedded real-time clock (RTC) enables time-stamped data logging and scheduled tasks.
Selection Guide & Purchasing Advice
Before purchasing, verify your control system's power supply (110–240V AC) and I/O count (20 inputs, 12 relay outputs). The 1766-L32BWA is discontinued, so confirm stock availability. At UBEST Automation (ubest101), we offer tested surplus units with full warranty. Check compatibility with your existing 1762 expansion modules and ensure your programming software version supports the MicroLogix 1400 family. For replacement of obsolete MicroLogix 1100 controllers, this model provides a straightforward upgrade path.