Confirm the complete 1756-L72S catalog number and series on the label.
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Allen-BradleyPart number: 1756-L72S
1756-L72S GuardLogix 5572S Safety Controller
The Allen-Bradley 1756-L72S is a GuardLogix 5570 controller for standard and safety control in a ControlLogix chassis. It provides 4 MB standard user memory and 2 MB safety memory.
Product lifecycleActive MatureAvailabilityRequest current quotation
- Standard user memory
- 4 MB
- Safety memory
- 2 MB
- I/O memory
- 0.98 MB
- Local programming port
- 1 USB
✓ Part-number review✓ Condition stated in quote✓ Worldwide delivery options
Product overview
Allen-Bradley 1756-L72S product information
The Allen-Bradley 1756-L72S is a GuardLogix 5570 controller for standard and safety control in a ControlLogix chassis. It provides 4 MB standard user memory and 2 MB safety memory.
This page is organized around the exact manufacturer part number so maintenance and purchasing teams can compare the product record with the installed component. Always check the nameplate, series or revision and system requirements before approving a replacement.
Technical data
1756-L72S specifications
Use these values for initial identification. Exact series, firmware, accessories and supplied condition must be confirmed before ordering.
| Standard user memory | 4 MB |
|---|---|
| Safety memory | 2 MB |
| I/O memory | 0.98 MB |
| Local programming port | 1 USB |
| Nonvolatile storage | Secure Digital; 1756-SD1 supplied by manufacturer |
| Maximum digital I/O | 128,000 |
| Maximum analog I/O | 4,000 |
| Current draw at 5.1V DC | 800 mA |
| Power dissipation | 2.5 W |
| Approximate weight | 0.25 kg (0.55 lb) |
| Operating temperature | 0…60 °C (32…140 °F) |
| Chassis location | Chassis-based; safety partner installs immediately to the right |
Compatibility01 02 03 04
Confirm the complete system—not only the model number
Industrial components can differ by series, firmware, voltage, network, terminal base, memory, accessories and approvals. A matching front label does not by itself guarantee a drop-in replacement.
Confirm the firmware required by the existing project.
Verify that the 1756-L7SP safety partner and chassis arrangement are suitable.
State whether new, surplus or refurbished condition is acceptable.
Supply condition
Know what is being quoted
The offered condition and inspection scope should be written into the quotation. Do not assume every source uses condition terms in the same way.
New product
Ask whether the unit is factory sealed, open-box or unused surplus, and confirm packaging when relevant.
Unused surplus
Confirm packaging, storage evidence, label condition and included accessories.
Refurbished product
Confirm the refurbishment source, functional test scope, cosmetic condition and warranty.
Used product
Request clear photographs and available inspection or functional-test information.
Documents & support
Technical references
Manufacturer documentation should be used for engineering, installation, safety and certification decisions. This page supports identification and sourcing; it does not replace the manufacturer manual.
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Questions about 1756-L72S
These answers support product identification and quotation preparation. Compatibility and safety decisions should follow manufacturer documentation and engineering review.
Ask about this modelWhat is the Allen-Bradley 1756-L72S?
It is a GuardLogix 5570 primary safety controller with 4 MB of standard user memory and 2 MB of safety memory for a ControlLogix chassis.
Does the 1756-L72S require a safety partner?
GuardLogix safety operation uses the compatible 1756-L7SP safety partner installed immediately to the right of the primary controller. Confirm the complete system configuration before replacement.
Can the 1756-L72S replace a 1756-L62S?
Rockwell Automation identifies the 1756-L72S as a functional replacement for the discontinued 1756-L62S, but firmware, project conversion and hardware compatibility still need engineering review.
Which details should I send for a quotation?
Send the full catalog number, series, firmware if known, quantity, required condition, destination and a clear nameplate photo.
Do you supply new and refurbished units?
Condition options depend on current sourcing. The quotation should state the offered condition, included accessories, inspection scope and warranty terms.
Need 1756-L72S?
Request 1756-L72SSend the part number and receive a clear quotation.
Include quantity, acceptable condition, destination and timing. A label photo helps verify the request.