ALLEN BRADLEY 1756-LSP Used Working Processor

Product Overview

The Allen-Bradley 1756-LSP is a specialized Logix5550 Service Port Module, designed as a companion for the ControlLogix L1 processor series. This module provides a dedicated communication bridge, allowing for direct serial access to the controller for programming, configuration, and data monitoring without occupying a standard slot for general I/O. As a Used Working unit, it is an essential component for technicians and engineers maintaining legacy ControlLogix systems, offering a reliable point of entry for RS-232 serial communications (DF1 or DH-485 protocols).

Key Features

• Dedicated Service Port: Provides a point-to-point connection for programming tools and HMIs, ensuring the main controller remains accessible even when networked I/O is busy.
• RS-232 Serial Interface: Features a standard 9-pin D-shell connector supporting high-speed serial data transmission for local diagnostics.
• Seamless Backplane Integration: Designed to plug directly into any standard 1756 ControlLogix chassis, drawing power and data directly from the backplane.
• Protocol Versatility: Supports multiple Allen-Bradley serial protocols, including DF1 Full-Duplex, DF1 Half-Duplex, and DH-485.
• Status Diagnostics: Front-panel LED indicators provide immediate visual feedback on the health of the module and active serial communication (TX/RX).
• Hot-Swappable: Supports Removal and Insertion Under Power (RIUP), allowing for maintenance or replacement without shutting down the entire rack.

Item Condition (Used Working)

• Functional Status: Used Working. The module has been professionally pulled from a functional rack. The RS-232 serial port has been tested with a 1756-CP3 cable to verify communication with RSLogix 5000.
• Physical State: Clean industrial condition. The backplane connector pins are straight and the 9-pin serial port is free of debris. The locking tabs are fully intact.
• Technical Integrity: No internal faults detected. The unit is ready for immediate installation and will be automatically recognized by the Logix5550 controller upon insertion.
• Note: This module is typically used with early-generation ControlLogix processors. Please verify compatibility with your specific 1756-L1 series CPU.

Package Includes

1. 1 x Allen-Bradley 1756-LSP ControlLogix Service Port Module
2. Attached 9-pin D-sub mounting screws