Allen-Bradley 1761-L32BWB MicroLogix 1000 Controller Processor

Description

The Allen-Bradley 1761-L32BWB is a compact and reliable MicroLogix 1000 programmable controller designed to handle small-scale automation applications and standalone machinery. Featuring an integrated power supply, embedded I/O channels, memory, and a communication interface, this controller delivers essential processing performance in a space-saving footprint. It supports both DIN rail and panel mounting options for installation flexibility within industrial control panels.

Equipped with DC inputs and relay outputs, the 1761-L32BWB facilitates seamless integration with operator interfaces, SCADA software, and programming terminals. Its built-in RS-232 communication port supports the DF1 protocol for efficient program uploading, downloading, and online monitoring, and it can interface with a 1761-NET-AIC module for connection to a DH-485 network.

Features

• Compact all-in-one design incorporating controller, power supply, and I/O channels
• Embedded RS-232 communication port supporting DF1 full-duplex, half-duplex slave, and radio modem protocols
• Includes 20 digital DC inputs, including one high-speed input, and 12 relay outputs
• Non-volatile EEPROM memory for reliable user program and data retention without requiring a battery
• Master Control Relay (MCR) output for enhanced system safety and machine shutdown control
• Flexible mounting capabilities supporting horizontal or vertical DIN rail and panel mount configurations

Applications

• Standalone industrial machinery and OEM equipment control
• Small-scale conveyor systems and material handling
• HVAC equipment automation
• Pump and compressor monitoring
• Lighting and environmental control systems

Technical Specifications

Connections / Interfaces

The 1761-L32BWB features removable terminal blocks for convenient field wiring of power, inputs, and outputs without disturbing existing cable routing. The 8-pin mini-DIN RS-232 port connects directly to programming PCs using standard communication cables or interfaces with industrial networks via network adapter modules.

Installation Guidelines

Mount the controller securely on a standard 35mm DIN rail or directly to a panel using mounting screws. Ensure a minimum clearance of 2 inches (51 mm) is maintained on all sides of the unit to allow adequate airflow and heat dissipation, regardless of whether the unit is mounted horizontally or vertically. Verify that power supply voltages are within specified operating limits prior to energizing the system.