Product Details
Product Description
The Allen Bradley 1756-L73S GuardLogix controller is a dual-slot safety automation processor designed for high-performance control and integrated safety applications. With 8 MB of standard user memory and 4 MB of dedicated safety memory, it supports large-scale systems requiring advanced safety functionality. The controller includes nonvolatile memory options, high I/O capacity, and robust electrical characteristics, making it suitable for complex industrial automation environments.
Technical Specifications
-
Manufacturer Allen Bradley
-
Product Line GuardLogix 1756 Series
-
Product Type Safety Automation Controller
-
Part Number 1756-L73S
-
User Memory 8 MB
-
Safety Memory 4 MB
-
I/O Memory 0.98 MB
-
Nonvolatile Memory Options
-
1 GB (1756-SD1 standard with controller)
-
2 GB (1756-SD2 optional)
-
Digital I/O Capacity Up to 128,000 points
-
Analog I/O Capacity Up to 4,000 points
-
Total I/O Capacity 128,000 points
-
Current Draw
-
5 mA @ 1.2 V DC
-
800 mA @ 5.1 V DC
-
Power Dissipation 2.5 W
-
Thermal Dissipation 8.5 BTU/hr
-
Isolation Voltage 30 V continuous (USB port-to-system), type tested at 980 V AC for 60 s
-
Slot Width 2 slots (controller requires both)
-
Weight 0.25 kg
-
Shipping Weight 1.5 kg
Application Scenarios
-
Large-scale safety-critical automation systems
-
Machine control requiring integrated safety and high I/O density
-
Distributed control systems with advanced memory and redundancy needs
FAQ
Q: What is the difference between user memory and safety memory? A: User memory (8 MB) is for standard control tasks, while safety memory (4 MB) is dedicated to safety-related functions.
Q: Does the controller include nonvolatile memory? A: Yes, a 1 GB SD card (1756-SD1) is included, with an optional 2 GB card (1756-SD2).
Q: How many I/O points can the 1756-L73S support? A: Up to 128,000 digital I/O points and 4,000 analog I/O points.
Comparable Models
-
1756-L73S: GuardLogix safety controller with 8 MB user memory and 4 MB safety memory (this model)
-
1756-L72S: GuardLogix controller with smaller memory capacity
-
1756-L74S: GuardLogix controller with larger memory for more complex systems
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
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.