Allen-Bradley 1764-24BWA MicroLogix 1500 Base Unit

The Allen-Bradley 1764-24BWA is a robust base unit from the MicroLogix 1500 series. It offers modular housing for processors, memory modules, and real-time clocks. This unit becomes a fully functional PLC when paired with a compatible processor.

Key Features

Integrated I/O and Communication

The 1764-24BWA comes with eight standard 24V DC inputs, four high-speed 20 kHz inputs, and twelve relay outputs. It includes an RS-232 communication port supporting DF1 protocol in full or half duplex mode. This enables connections to devices like HMIs, SCADA systems, and gateways.

Expandable Design

This base unit supports installation of 1769 Compact I/O modules. Users can enhance functionality through direct module attachment or use an expansion rack with a 1769 expansion cable.

Power and Mounting Options

The unit operates with 85 to 265 Volts AC line power. It consumes 88 VA and delivers 24V DC sensor power at up to 400 mA. It can be installed using a DIN rail or mounting screws, requiring a two-inch clearance on all sides for proper ventilation.

Technical Specifications

• Manufacturer: Rockwell Automation

• Brand: Allen-Bradley

• Series: MicroLogix 1500

• Part Number: 1764-24BWA

• Input Voltage: 24V DC (sink/source)

• Outputs: 12 relay outputs (24-125VDC, 120-240VAC)

• Communication Port: RS-232 Serial

• Operating Frequency: 0 to 20 kHz

• Power Supply Voltage: 85-265 VAC

• Mounting: Horizontal (DIN rail or panel)

• Dimensions: 5.43 x 6.62 x 3.43 inches

• Temperature Range: 32 to 131°F (0 to 55°C)

• Maximum Expanded I/O: 512 points

• Compatible Processors: 1764-LSP, 1764-LRP

• Compatible Memory Modules: 1764-MM1, 1764-MM2, 1764-MM3, 1764-MM4

• Time Clock Compatibility: 1764-RTC or 1764-MM1RTC

Certifications

The 1764-24BWA is certified for CE, C-Tick, UL, c-UL, and Class I Division 2 Hazardous Locations. These certifications ensure safe and reliable operation across industrial environments.

Notes on Installation and Usage

The 1764-24BWA must be installed away from power lines to avoid electrical noise. It requires a compatible processor for operation and can be equipped with optional Data Access Tools (DAT) for simplified data handling.

Product Lifecycle Status

The Allen-Bradley 1764-24BWA is classified as Discontinued/Obsolete. Replacement units or compatible alternatives should be considered for new projects or system expansions.