Allen-Bradley 1764-LRP MicroLogix 1500 Processor Unit with RS-232 Port

Product Description

The 1764-LRP is a high-performance processor unit within the Allen-Bradley MicroLogix 1500 family. Unlike the standard base models, this advanced CPU features an additional isolated RS-232-C port, providing enhanced communication capabilities for complex networking and peer-to-peer data exchange.

Designed to be paired with a 1764-24AWA, 1764-24BWA, or 1764-28BXB base unit, the 1764-LRP (Ser A/B/C) acts as the intelligence of the controller. It offers a larger memory capacity (14 KB) compared to the LSP variant, supporting more extensive user programs and data logging. Its modular design allows for easy maintenance and hardware upgrades without disturbing the base wiring, making it a staple for scalable industrial automation projects.

Detailed Technical Specifications

• Model Number: 1764-LRP

• Brand: Allen-Bradley / Rockwell Automation

• Product Line: MicroLogix 1500

• Memory Size: 14 KB (approximately 10K words for user program/data)

• Communication Ports: Dual Ports (Port 0: RS-232 8-pin mini-DIN; Port 1: Isolated RS-232 9-pin D-shell)

• Protocols Supported: DF1 Full-Duplex/Half-Duplex, DH-485, Modbus RTU Slave, ASCII

• Expansion Capacity: Supports up to 16 1769 Compact I/O modules (depending on power supply limits)

• Data Logging: Configurable for up to 48 KB of data storage

• Recipe Storage: Supported via user-defined data files

• Clock/Calendar: Integrated real-time clock (RTC)

• Operating Temperature: 0 to 55 degrees Celsius (32 to 131 degrees Fahrenheit)

• Shock/Vibration: 30G shock; 5Hz to 500Hz vibration resistance

• Net Weight: 0.21 kg (0.46 lbs)

Primary Application Scenarios

The 1764-LRP is ideal for applications requiring simultaneous connection to an HMI and a secondary network, such as a SCADA system or a modem. It is frequently utilized in material handling, HVAC control, and water treatment systems where localized logic must be integrated into a broader factory floor architecture.

Technical FAQ

• Does the 1764-LRP require a separate battery?

  Yes, for long-term data retention during power loss, a 1747-BA lithium battery is recommended to support the integrated volatile memory.

• Is it compatible with 1769 series I/O?

  Yes, the MicroLogix 1500 system uses the same 1769 expansion I/O modules as the CompactLogix platform, allowing for highly flexible I/O configurations.