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
Navigating Industrial Automation Failures: Types, Causes, and Mitigation Strategies
Modern manufacturing relies heavily on automated control systems to maximize throughput and maintain product quality. However, unplanned downtime in industrial automation can cost facility operators thousands of dollars per hour. Understanding how programmable logic controllers (PLCs), distributed control systems (DCS), and field instrumentation fail empowers engineering teams to implement robust preventive maintenance strategies.
Essential Motion Control Commands: A Practical Guide for Engineers
Automation engineers often rely on precise position and speed control to drive modern factory machinery. Modern industrial systems, such as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), depend heavily on standardized motion instructions. Mastering these commands ensures operational safety, protects mechanical components, and optimizes cycle times across production lines.
The Role of Intrinsic Safety Barriers in PLC and DCS Architectures
Implementing robust protection in hazardous industrial environments represents a fundamental safety requirement in factory automation. Process facilities often handle volatile gases, dusts, and chemical agents that pose significant combustion risks. Consequently, control system engineers must deploy energy-limiting interfaces to isolate safe-area control cabinets from hazardous-area field instrumentation. This article examines the function, selection, and electrical principles of intrinsic safety barriers within modern PLC and DCS networks.