Allen-Bradley 1756-L55/A SER. A ControlLogix 5555™ Processor Unit / Memory Expan

REFURBISHED Allen‑Bradley 1756‑L55/A ControlLogix 5555™ Processor Unit with 1756‑M14 Memory Expansion is a high‑performance industrial controller designed for multidiscipline automation systems requiring fast processing, large I/O capacity, and reliable operation. This module forms part of the ControlLogix platform, offering robust communication options and expandable nonvolatile memory. Technical Specifications: Manufacturer: Allen‑Bradley / Rockwell Automation — Manufactured in the United States Model: 1756‑L55/A (Series A) Controller Installed Memory Expansion: 1756‑M14 Product Family: ControlLogix 5555™ Memory Expansion Card Included: 1756‑M14 Backplane Current Draw (5.1 VDC): 1.23–1.25 A Backplane Current Draw (24 VDC): 0.014 A Power Dissipation: 5.6–5.7 W Thermal Dissipation: 19.1–19.4 BTU/hr Isolation Voltage: 30 V continuous (basic insulation) Operating Temperature Range: 0 to 60 °C (32 to 140 °F) Storage Temperature Range: –40 to 85 °C (–40 to 185 °F) Enclosure: Open‑style module, chassis‑mounted Communications: RS‑232 serial port (standard on L55) Supported I/O Capacity: Up to 128,000 digital I/O and 4,000 analog I/O (platform capability) Architecture Features: High‑speed processing, modular design, motion control support, redundant‑system compatibility (general L55 capabilities)