In modern industrial automation, reliable communication between remote I/O and PLCs is essential. The Schneider Electric CRA module enables efficient Ethernet-based remote I/O connectivity in PLC and DCS systems, improving scalability, diagnostics, and overall networked automation performance.
Product Details
Overview
The Allen-Bradley 1756-L61 ControlLogix controller is a high-performance processor module designed for demanding industrial automation tasks. With 2 MB of user memory, it supports large control applications and high-speed data handling across complex systems. The module integrates easily into ControlLogix chassis and communicates via RS-232 serial ports using multiple industrial protocols.
Technical Specifications
-
Model / Part Number: 1756-L61
-
Brand: Allen-Bradley
-
Product Type: ControlLogix Processor Module
-
Product Line: ControlLogix Series
-
Fixed Memory Options: 2 MB, 4 MB, or 8 MB
-
Nonvolatile Memory: CompactFlash Card (1784-CF128)
-
I/O Capacity: 128,000 Digital I/O, 4,000 Analog I/O
-
Communication Interface: RS-232 Serial Port
-
Supported Protocols: ASCII, DF1 (Full/Half Duplex), DF1 Radio Modem, DH-485, Modbus (via logic)
-
Program Scan Time: 0.08 ms per 1K of Boolean instructions
-
Backplane Current Draw:
-
5V DC: 1.2 A
-
24V DC: 14 mA
-
Battery Options: 1756-BA1, 1756-BATM, 1756-BATA
-
Vibration Tolerance: 10–500 Hz
-
Relative Humidity: 5–95% (non-condensing)
-
Weight: 0.75 lbs (0.34 kg)
-
Lifecycle Status: Discontinued / Obsolete
Key Features
-
Designed for medium to large-scale automation systems
-
Supports multiple communication protocols for flexible integration
-
Compatible with ControlLogix chassis for modular expansion
-
High-speed data processing with deterministic performance
-
CompactFlash card support for data retention and transfer
Applications
-
Process and machine control systems
-
Data acquisition and supervisory control
-
Integration of legacy and modern devices within plant networks
FAQs
Q1: What type of memory is included in the 1756-L61 module?
The module includes 2 MB of onboard user memory and supports external CompactFlash cards for nonvolatile storage.
Q2: Which protocols are supported by the RS-232 interface?
It supports DF1, ASCII, DH-485, and Modbus communication for flexible network integration.
Q3: Is the 1756-L61 still available for purchase?
The 1756-L61 has been discontinued by Allen-Bradley but remains supported for replacement and maintenance purposes.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Technical Insights, Installation Guides, and Buying Tips
Upgrading vs. Migrating PLC Systems: Choosing the Right Strategy for Industrial Automation
In industrial automation, Programmable Logic Controllers (PLCs) are vital for control and monitoring. Over time, support and spare parts become limited, forcing engineers to decide between upgrading the existing PLC or migrating to a new system to maintain reliability and reduce downtime.
Site Commissioning Steps for PLC Programmers: A Complete Industrial Automation Guide
Commissioning a PLC control system is one of the most critical phases in any industrial automation project. It transforms design and programming into a fully functional, reliable system on site. For new PLC programmers, understanding each commissioning step ensures smooth integration, reduced downtime, and successful handover to the client.