Allen-Bradley 1756-L55M22 ControlLogix Programmable Automation Controller

Description

The Allen-Bradley 1756-L55M22 is a ControlLogix5555 programmable automation controller designed for high-performance industrial control and processing application tasks within a ControlLogix system chassis. The controller manages system execution, data logic, and communication functions across connected devices, utilizing nonvolatile memory capabilities alongside dedicated data and logic memory. Communication interfaces include an integrated RS-232 serial port for workstation connectivity and diagnostic interactions. Designed as part of the ControlLogix family, the 1756-L55M22 operates inside open-style chassis enclosures for process control, discrete control, and automated machinery installations.

Features

• Provides 750 KB of data and logic memory along with 208 KB of I/O memory.
• Supports nonvolatile memory functionality for program and data protection.
• Features an integrated RS-232 serial communication port for serial connection and programming.
• Mounts into any available slot of a ControlLogix chassis.
• Equipped with front-panel LED status indicators including RUN, I/O, FORCE, RS232, BAT, and OK.
• Features a three-position mode selection keyswitch (RUN, REM, PROG).

Applications

• Industrial process control systems
• Automated manufacturing machinery
• Distributed I/O control architectures
• Machine automation and monitoring

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Ensure backplane power is removed or the area is known to be nonhazardous prior to inserting or removing the controller or connecting cables.
• Discharge potential static by wearing an approved grounding wriststrap and touching a grounded object before handling the module.
• Mount the equipment inside a suitably designed open-type enclosure complying with appropriate flame-retardant ratings and accessible only with a tool.
• Connect the 1756-BA1 battery correctly prior to placing the controller in service.
• Align the module circuit board with top and bottom chassis guides and slide into the chassis slot until fully engaged.
• Limit custom serial cable lengths to a maximum of 15.2 m (50 ft) and attach the shield at both ends.

Compliance and Certifications

• UL Listed Industrial Control Equipment (UL File E65584)
• CSA Certified Process Control Equipment (CSA File LR54689C)
• CSA Certified Process Control Equipment for Class I, Division 2 Group A, B, C, D Hazardous Locations (CSA File LR69960C)
• European Union 2004/108/IEC EMC Directive (EN 61326-1, EN 61000-6-2, EN 61000-6-4, EN 61131-2)
• C-Tick Australian Radiocommunications Act (AS/NZS CISPR 11)
• European Union 94/9/EC ATEX Directive (EN 60079-15, Zone 2)