Allen-Bradley 1785-L60B 3072 I/O Enhanced Programmable Controller

Allen-Bradley 1785-L60B PLC-5/60 Enhanced Processor Module Series C

Product Overview

The 1785-L60B is a high-performance, enhanced programmable controller within the legacy Allen-Bradley PLC-5 family. Engineered for large-scale industrial applications, the 1785-L60B Series C provides robust processing power and extensive memory capacity to manage complex logic, advanced math functions, and large-scale distributed I/O networks. This processor is a cornerstone for systems requiring high reliability in process industries and factory automation, offering seamless integration with Universal Remote I/O (RIO) and Data Highway Plus (DH+) networks. As a modular CPU, it installs directly into the leftmost slot of a 1771 I/O chassis, serving as the central intelligence for distributed control architectures.

Technical Specifications

The 1785-L60B is characterized by its high-density I/O support and deterministic communication capabilities.

• Manufacturer: Rockwell Automation / Allen-Bradley

• Model Number: 1785-L60B

• Series: Series C

• Controller Type: PLC-5/60 Enhanced Processor

• User Memory: 64K Words (SRAM battery-backed)

• Total I/O Capacity: 3,072 Maximum (Any mix of inputs/outputs)

• Max Number of I/O Racks: 24 Racks

• Communication Ports: 1 x RS-232-C / 422-A / 423-A; 2 x DH+/Remote I/O (Universal)

• Backplane Current Load: 3.3 Amps @ 5V DC

• I/O Scan Time per Rack: 10 ms @ 57.6 kbps; 7 ms @ 115.2 kbps; 3 ms @ 230.4 kbps

• Program Backup: Optional EEPROM (1785-ME16, -ME32, -ME64, -M100)

• Battery Module: 1770-XYC Lithium Battery

• Operating Temperature: 0°C to +60°C (32°F to 140°F)

• Thermal Dissipation: 57.4 BTU/hr

• Weight: 3.13 lbs (1.42 kg)