The 1756-L55M16 is a high-performance programmable logic controller (PLC) processor module belonging to Allen-Bradley’s ControlLogix product family. It serves as the core of industrial automation systems, enabling centralized control, data processing, and real-time communication for complex manufacturing and process applications.
- Brand: Rockwell Automation (Allen-Bradley)
- Product Series: ControlLogix 1756
- Processor Model: L55 (mid-range performance tier for ControlLogix)
- Memory Configuration: 16 MB user memory (expandable via optional memory cards)
- Form Factor: 3-slot width, designed for seamless installation in 1756 ControlLogix chassis
- Power Supply: Draws operating power from the ControlLogix chassis backplane (compatible with 1756 power supply modules like 1756-PA72/PA75)
- Processing Speed: Supports up to 0.08 milliseconds per ladder logic rung (typical), enabling fast execution of complex control programs.
- I/O Capacity: Can manage up to 128,000 digital I/O points or 4,096 analog I/O points when paired with compatible 1756 I/O modules (e.g., 1756-IB16, 1756-OA16, 1756-IRT8I).
- Task Management: Allows configuration of multiple prioritized tasks (including periodic, event-triggered, and continuous tasks) to optimize control logic execution.
- Communication Ports: Equipped with one 10/100 Mbps Ethernet port (for PlantPAx, Ethernet/IP communication) and one ControlNet port (for high-speed, deterministic network communication with other ControlLogix devices).
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C (-40°F to 185°F)
- Relative Humidity: 5% to 95% (non-condensing, no frost)
- Vibration Resistance: 5 Hz to 500 Hz, 2.5 g peak (per IEC 60068-2-6)
- Shock Resistance: 30 g peak (11 ms duration, per IEC 60068-2-27)
- Certifications: UL 508 (Industrial Control Equipment), CSA C22.2 No. 14, CE (EN 61010-1), ATEX Zone 2, IEC 61508 SIL 2 (for safety-related applications)
- Seamless Integration: Works with all 1756-series I/O modules, communication modules (e.g., 1756-EWEB, MVI56E-MNET), and peripheral devices for flexible system expansion.
- Redundancy Support: Compatible with ControlLogix redundant chassis setups (when paired with redundant power supplies and communication modules) to ensure fault tolerance in critical applications.
- Programming Software: Configured and programmed via Rockwell Automation’s Studio 5000 Logix Designer software, supporting ladder logic, function block diagrams (FBD), and structured text (ST) programming languages.
- Diagnostic Capabilities: Built-in status LEDs (power, backplane communication, network activity) and software-based diagnostics to monitor module health and troubleshoot issues.
- Data Logging: Supports on-board data logging to external memory cards, enabling storage of process data for analysis and compliance.
