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SKU: 1756-L62

Allen-Bradley 1756-L62 ControlLogix Logix5562 Processor

The Allen-Bradley 1756-L62 is a Logix5562 processor featuring 4 MB of user memory and 128,000 I/O capacity. This ControlLogix module supports 32 tasks and redundancy for high-availability industrial control. It remains a reliable solution for maintaining legacy factory automation systems.

The Allen-Bradley 1756-L62 belongs to the Logix5562 family of Programmable Automation Controllers. This processor manages demanding industrial applications within the ControlLogix ecosystem. It provides 4 MB of volatile user memory for logic and data storage. Although Rockwell Automation officially retired this model in 2017, it remains a vital spare part. Facility managers often use it to maintain existing legacy systems. The 1756-L72 currently serves as the recommended functional migration path for new installations.

Technical Performance and Connectivity

  • User Memory: 4 Megabytes
  • I/O Support: 128,000 total digital and 4,000 analog signals
  • Task Management: 32 concurrent tasks with 100 programs per task
  • Local Communication: Built-in RS-232 serial port
  • Supported Protocols: DF1, DH-485, Modbus, and ASCII
  • Network Compatibility: EtherNet/IP, ControlNet, and DeviceNet via bridge modules
  • Connection Capacity: Supports up to 250 logical connections
  • Chassis Compatibility: All 1756 ControlLogix chassis series

Operating Environment and Hardware

This processor operates reliably in temperatures ranging from 0 to 60 degrees Celsius. It features high physical durability with shock resistance rated at 50g. Internal thermal dissipation reaches 11.9 BTU per hour during peak operation. The module consumes 3.5 Watts of power from the backplane. Users must install a 1756-BA1 or 1756-BA2 battery to maintain memory during power loss. Furthermore, the unit supports full controller redundancy for mission-critical processes. This capability prevents system downtime during hardware transitions.

Integration and Maintenance

The 1756-L62 integrates seamlessly with RSLogix 5000 or Studio 5000 Logix Designer software. It allows for advanced diagnostic monitoring and real-time data acquisition. Maintenance teams can perform firmware updates to ensure compatibility with various I/O modules. While the module is compact, it occupies a single slot in the chassis. Its robust design supports vibration resistance up to 2g. Consequently, it performs well in heavy manufacturing and process automation environments.