Excellent PLC
Product Introduction
The Allen Bradley 1756-PLS is a ControlLogix Programmable Limit Switch (PLS) module designed to provide flexible monitoring and control of discrete inputs and outputs in industrial automation systems. This module integrates 16 DC inputs and 16 current-sourcing DC outputs into a single compact unit, allowing direct interface with sensors, limit switches, actuators, and other field devices.
The 1756-PLS is ideal for applications where discrete I/O logic must be monitored, processed, and controlled locally with precise timing or sequencing requirements. It supports programmable functionality that enables logic execution directly within the module, reducing latency and offloading simple control tasks from the main PLC processor.
With a compact form factor and robust design, the 1756-PLS can be installed directly into a ControlLogix chassis, providing reliable and efficient digital I/O handling in manufacturing, material handling, and machine automation environments.
Product Specifications
| Parameter | Description |
|---|---|
| Product Name | Allen Bradley 1756-PLS |
| Series | ControlLogix |
| Type | Programmable Limit Switch Module |
| Inputs | 16 DC discrete inputs |
| Outputs | 16 current-sourcing DC outputs |
| Input Voltage | 16–32 VDC standard |
| Output Current | 0.5–1 A per channel (typical) |
| Mounting | ControlLogix chassis |
| Programmable Features | Limit switch logic, sequencing, local I/O control |
| Protection Features | Overcurrent, short-circuit protection on outputs |
| Dimensions | 180 x 50 x 160 mm |
| Weight | 0.89 kg |
Applications
• Conveyor Systems — Monitoring end-of-travel sensors and actuating stops, gates, or diverters.
• Machine Automation — Local discrete logic processing for safety interlocks, limit switches, and actuator control.
• Packaging Lines — Synchronizing inputs from sensors and controlling outputs to actuators or signal devices.
• Material Handling — Monitoring position sensors and controlling solenoid valves or motors in automated handling equipment.
• Robotics and Assembly Machines — Precise local I/O handling to reduce processor load and improve response times.
Advantages
• Integrated Programmable Logic — Reduces PLC load by executing simple local control sequences.
• 16 DC Inputs / 16 DC Outputs — High-density I/O in a single compact module.
• Current-Sourcing Outputs — Compatible with a wide range of actuators and field devices.
• Robust Industrial Design — Designed for harsh industrial environments with reliable operation.
• Compact Footprint — Saves chassis slots while providing extensive I/O capabilities.
• Flexible Sequencing — Supports programmable limit switch logic for enhanced machine control.
