1756-L55 Allen-Bradley ControlLogix Processor

Allen-Bradley 1756-L55 ControlLogix Logix5555 Processor

The Allen-Bradley 1756-L55 is a ControlLogix Logix5555 processor module. This Series A controller comes without integrated user memory. It requires external memory modules for program storage in ControlLogix automation systems.

Product Overview

• Brand: Allen-Bradley / Rockwell Automation
• Model: 1756-L55 Logix5555 Processor
• Series: ControlLogix Series A
• User Memory: None included (requires external)
• Battery: 1756-BA1 lithium battery included

Electrical Specifications

• Backplane Current: 1.23-1.25A @5.1V DC
• 24V Current: 0.014A @24V DC
• Power Dissipation: 5.6-5.7 Watts
• Thermal Dissipation: 19.1-19.4 BTU/hour
• Isolation Voltage: 30V continuous, 707V DC tested

Physical Specifications

• Weight: 0.35 kg (12.5 ounces)
• Enclosure: Open-style design
• Installation: ControlLogix chassis slot
• Connections: Backplane interface standard
• Cables: 1756-CP3/1747-CP3 serial cable compatible

Environmental Ratings

• Operating Temp: 0 to 60°C (32-140°F)
• Storage Temp: -40 to 85°C (-40-185°F)
• Temperature Code: T4 IEC rating
• Standards: IEC 60068 compliant
• Protection: Basic insulation type

Communication & Interface

• Serial Port: RS-232 communication interface
• Backplane: ControlLogix chassis integration
• Insulation: Basic insulation, 30V continuous
• Testing: 707V DC for 60 seconds withstand
• Compatibility: ControlLogix platform standard

FAQ

• Q: What is 1756-L55?
  A: Allen-Bradley ControlLogix processor without user memory.
• Q: Memory included?
  A: No user memory, requires external memory modules.
• Q: Power requirements?
  A: 1.23-1.25A @5.1V DC from backplane.