Overview
The Allen-Bradley 1766-L32BXBA MicroLogix 1400 is a sealed compact programmable logic controller designed for small-to-medium industrial automation applications. This 32-point controller combines integrated digital and analog I/O, multiple communication protocols, and a built-in LCD interface—making it well-suited for machine control, process automation, and equipment monitoring. The MicroLogix 1400 controller with catalog number 1766-L32BXBA is a compact Programmable Logic Controller (PLC) that is especially used in micro and small automation requirements.
Key Features
- Powered by 24VDC external supply with Twelve (12) Fast 24VDC, Eight (8) Normal 24VDC inputs, Two (2) Voltage inputs, Six (6) Relay outputs, Three (3) Fast DC, Three (3) Normal DC outputs and Two (2) Voltage output channels
- One (1) isolated RS232 / RS485 combo port, capable One (1) non-isolated RS232 communication port and One (1) Ethernet communication port
- Built in LCD display, RS-232, and Ethernet Port
- Embedded I/O channels may be expanded by installing up to Seven (7) 1762 I/O modules
- Integrated web server that may be accessed using a standard web browser
- Internal memory amounting to 20KB, with a replaceable battery back-up using the 1746-BA
Technical Specifications
- Digital Inputs: 12 Fast 24VDC (high-speed), 8 Normal 24VDC
- Digital Outputs: 6 Relay, 3 Fast 24VDC, 3 Normal 24VDC
- Analog I/O: 4 Analog inputs (12-bit), 2 Analog outputs (12-bit)
- Total I/O Points: 32 discrete + 6 analog
- Power Supply: 24VDC external, battery-backed RAM with replaceable 1746-BA battery
- Program Memory: 20KB internal
- Communication Ports: Ethernet (IP-based protocols), Isolated RS232/RS485 combo, Non-isolated RS232
- Supported Protocols: DF1 Full and Half duplex, DNP3, MODBUS RTU, ASCII and DH485 via serial; Ethernet supports MODBUS TCP, DNP3 and Ethernet I/P
- Display: Built-in LCD with backlight for configuration and status monitoring
- Mounting: DIN rail and panel mount
- Enclosure Rating: IP20
Typical Applications
It’s a standalone controller that excels in controlling machinery, processes, and production lines with precision and reliability. Common uses include:
- Machinery and equipment control with mixed analog and digital signals
- SCADA integration and HMI connectivity via Ethernet and serial protocols
- Production line automation requiring compact, cost-effective control
- Process monitoring with data logging and real-time clock functions
- Legacy device integration using Modbus RTU, DNP3, or DF1 protocols
Compatibility & Replacements
Compatible With
- PanelView Plus HMIs for operator control and visualization
- SCADA Systems for plant-wide monitoring and data acquisition
- RS Logix 500 programming software
- Other PLCs and Drives across your network
- Industry standard protocols: EtherNet/IP, Modbus TCP, Modbus RTU, DF1, DH-485, DNP3, ASCII
Replaces / Drop-In Replacement For
The 1766-L32BXBA is the Series C (latest sealed revision) of the MicroLogix 1400 32-point controller platform. Verify compatibility with your system integrator before ordering for your specific legacy or upgrade scenarios.
Works With
- RS Logix 500 and AutomationDirect LogicLadder (third-party compatible)
- Allen-Bradley 1762 series I/O expansion modules (up to 7 modules)
- PanelView operator terminals and touch panels
- Ethernet-based SCADA and MES systems supporting EtherNet/IP or Modbus TCP
- Remote monitoring via integrated web server
- Third-party devices via serial ports (barcode scanners, weigh scales, drives)
