Allen-Bradley 1756-L71S ControlLogix PLC Controller
$5,700.00
Out of stock
Request QuoteThe 1756-L71S is an Allen-Bradley GuardLogix 5570 safety controller with 2 MB user memory and 1 MB safety memory. Achieves SIL CL 3 / PL e (Cat. 4) with safety partner; SIL 2 without. Requires a separate communication module for EtherNet/IP and a safety partner module in the slot immediately to the right (2-slot footprint).
| User Memory | 2 MB |
| Safety Memory | 1 MB |
| Comms | 1 USB 2.0 (no embedded Ethernet — requires separate comm module) |
| Programming | LD, ST, FBD, SFC |
| Slot Width | 2 slots (controller + safety partner) |
| Platform | ControlLogix (1756) |
Description
Allen-Bradley 1756-L71S
The 1756-L71S is an Allen-Bradley GuardLogix 5570 safety controller with 2 MB user memory and 1 MB safety memory. Achieves SIL CL 3 / PL e (Cat. 4) with safety partner; SIL 2 without. Requires a safety partner module in the slot immediately to the right of the primary controller (2-slot footprint). Uses a separate communication module for EtherNet/IP connectivity. Includes 1756-ESMCAP energy storage and 1 GB SD card slot.
| Controller Overview | |
|---|---|
| Catalog Number | 1756-L71S |
| Controller Type | GuardLogix 5570 Safety Controller |
| User Memory | 2 MB |
| Safety Memory | 1 MB |
| Safety Rating | SIL CL 3 / PL e (Cat. 4) with safety partner; SIL 2 without |
| Safety Tasks | Standard + 1 safety task |
| Module Location | Safety partner in slot immediately right of primary controller |
| Programming | LD, ST, FBD, SFC |
| Power & Electrical | |
|---|---|
| Power Dissipation | 2.5 W / 8.5 BTU/hr |
| Current Draw | 5 mA @ 1.2V DC, 800 mA @ 5.1V DC |
| Isolation | 30V continuous, Basic Insulation, USB to backplane, IEC/UL 61010-1 |
| Communications | |
|---|---|
| USB | 1 USB 2.0 |
| EtherNet/IP | Via separate comm module (not embedded) |
| Controller Connections | 500 |
| Physical & Environmental | |
|---|---|
| Weight | 0.25 kg (0.55 lb) |
| Slot Width | 2 slots (controller + safety partner) |
| Operating Temp | 0…60 °C |
| Nonvolatile Storage | 1 GB SD card (1784-SD1) |
| Energy Storage | 1756-ESMCAP (ships with controller) |
Disclaimer: PLC Exchange is an independent reseller and is not an authorized distributor, affiliate, licensee, partner, or agent of Allen-Bradley / Rockwell Automation. All product information on this page is compiled from publicly-available manufacturer publications, technical data sheets, and catalog sources, each of which remains the copyright of its originating manufacturer. We make no representation or warranty, express or implied, regarding the accuracy, completeness, timeliness, or fitness for any particular purpose of the specifications or descriptions shown — content may contain errors, omissions, or out-of-date information. Product images are the property of their respective manufacturers, trademark owners, and source publications, and are displayed solely for identification purposes under the nominative fair use doctrine; images are representative and may depict a different configuration or catalog variant than the exact product listed. Purchasers should independently verify specifications against the current manufacturer publication before placing an order. All product names, trademarks, service marks, and registered trademarks are the property of their respective owners, and their use does not imply endorsement or affiliation.
Technical Notes for 1756-L71S
- Refer to the manufacturer's installation instructions for proper mounting, wiring, and configuration.
- Ensure compatibility with your existing system architecture before ordering.
- All 1756-L71S units sold by PLC Exchange are tested and ship in original factory packaging.
- For application-specific questions or system compatibility verification, contact PLC Exchange technical support at [email protected] or 980-202-0882.
Alternative Part Numbers & Names for 1756-L71S
The 1756-L71S by Allen-Bradley may also be found under the following alternative names, catalog numbers, or common search variations:
- 1756L71S
- Allen Bradley 1756-L71S
- Allen-Bradley 1756-L71S
- 1756 L71S
- 1756/L71S
- ControlLogix 1756-L71S
All variations refer to the same Allen-Bradley product. If you are unsure whether this is the correct part for your application, contact our team for assistance.
Additional information
| Weight | 1.05 lbs |
|---|---|
| Dimensions | 3.94 × 2.28 × 5.67 in |
| mpn | 1756-L71S |
| manufacturer | Allen-Bradley |
| condition | Original Packaging |
| warranty | 2.5 Year PLC Exchange Warranty, 30 Days worry-free return from delivery |
| upc | 885630016467 |
Dimensions & Weight for 1756-L71S
| Shipping Dimensions | |
|---|---|
| Weight | 1.05 lbs |
| Length | 3.94 in |
| Width | 2.28 in |
| Height | 5.67 in |
| Box Dimensions (L×W×H) | 3.94 × 2.28 × 5.67 in |
Dimensions shown are for the shipping package. For module-level mechanical dimensions, refer to the manufacturer datasheet.
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Frequently Asked Questions
Where can I find the technical datasheet for the 1756-L71S?
The official manufacturer datasheet is available for download on the 1756-L71S product page at PLC Exchange. Look for the Tech Data PDF link in the product description.
What programming languages does the 1756-L71S support?
The 1756-L71S supports: LD, ST, FBD, SFC.
Does the 1756-L71S include a warranty?
Yes. Every 1756-L71S sold by PLC Exchange includes a 2.5-year warranty (30 months, full replacement). Details: https://plcexchange.net/warranty-information/
What is the return policy for the 1756-L71S?
PLC Exchange offers a 30-day worry-free return policy. Eligibility and details: https://plcexchange.net/return-policy/
When will my 1756-L71S ship?
In-stock orders placed before 4 PM ET ship the same business day via free UPS Ground. Expedited options (Next Day Air, 2nd Day Air) are available at checkout.
Who manufactures the 1756-L71S?
The 1756-L71S is manufactured by Allen-Bradley. PLC Exchange is an independent reseller specializing in Allen-Bradley industrial automation products.
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