ALLEN-BRADLEY 1756-L63/B ControlLogix Controller

OverviewALLEN-BRADLEY 1756-L63/B is a Logix5563 processor module for the Allen‑Bradley ControlLogix platform, revision B. It is a high-performance PLC controller with 8 MB user memory, designed for large-scale sequential control, process control, and integrated motion applications. This module installs into any slot of the 1756 backplane chassis and works with ControlLogix I/O modules, communication adapters and power supplies. It supports multiple control networks including EtherNet/IP, ControlNet, DeviceNet and Remote I/O, and can manage up to 128,000 digital I/O points and 4,000 analog I/O points. This part was officially discontinued in June 2017 and is now circulated as aftermarket spare for legacy automation systems.

FeaturesALLEN-BRADLEY 1756-L63/B supports multi-task scheduling with up to 32 tasks and 100 programs per task. The ControlLogix Controller supports standard Rockwell programming languages: ladder logic, structured text, function block diagram and sequential function chart. It is equipped with one RS‑232 serial port for programming and local communication, and supports integrated motion control via CIP Motion. Built-in diagnostic LEDs indicate run, fault, force and communication status. It uses a replaceable lithium battery to retain memory during power loss. It supports producer/consumer communication model, controller redundancy and hot-swappable I/O. The module complies with UL, CE, CSA and relevant industrial control standards. ALLEN-BRADLEY 1756-L63/B is widely paired with 1756-ENBT, 1756-CNB and other communication modules to build distributed control systems.

SpecsALLEN-BRADLEY 1756-L63/B controller module. The ControlLogix Controller catalog number: 1756-L63/B. Series: ControlLogix Logix5563. User memory: 8 MB. Max digital I/O: 128000 points. Max analog I/O: 4000 points. Task count: up to 32 tasks. Onboard port: RS-232. Supported networks: EtherNet/IP, ControlNet, DeviceNet, DH+, Remote I/O. Current draw: 1.2 A @ 5 VDC, 14 mA @ 24 VDC. Battery: 1756-BA2. Mounting: 1756 series chassis backplane. Lifecycle: discontinued, spare stock only. It is stocked as ControlLogix CPU spare.

Operating ParametersALLEN-BRADLEY 1756-L63/B ambient operating temperature: 0℃ ~ +60℃. The ControlLogix Controller relative humidity: 5%~95% non-condensing. Isolation: basic insulation on RS-232 port. Protection class: open style, for cabinet installation. EMC: comply with industrial control IEC standards.

PrincipleALLEN-BRADLEY 1756-L63/B executes user control logic cyclically according to configured task schedules. The ControlLogix Controller reads input status from backplane or remote I/O, runs logic calculations, and writes output commands to field modules. It exchanges data with other controllers, drives and HMI through CIP-based networks. The internal battery preserves program and tag data when rack power is removed. CPU core failure, battery depletion, backplane communication fault or firmware corruption will cause ALLEN-BRADLEY 1756-L63/B to fault and stop control.

ApplicationsALLEN-BRADLEY 1756-L63/B is widely deployed in oil & gas processing plants, water treatment facilities, power plant auxiliary control, packaging lines, material handling systems and marine automation control cabinets. The ControlLogix Controller undertakes centralized logic control, motion coordination and data exchange, cooperating with ControlLogix I/O modules, communication cards, variable frequency drives and operator stations. ALLEN-BRADLEY 1756-L63/B is a preferred spare for legacy Rockwell ControlLogix system maintenance and replacement.