2.5-Year Warranty Free Shipping Same-Day Shipping Charlotte, NC
2.5-Year Warranty · Free Shipping · Same-Day Shipping 980-202-0882 · Charlotte, NC

Allen-Bradley 1756-L73S ControlLogix PLC Controller

Manufacturer: Allen-Bradley
MPN: 1756-L73S
UPC/GTIN: 885630016481

$3,414.65

Out of stock

Request Quote
2.5-Year Warranty Included
Free UPS Ground NDA available
Ships Today Order by 4 PM ET

The 1756-L73S is an Allen-Bradley GuardLogix 5570 safety controller with 8 MB user memory and 4 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 8 MB
Safety Memory 4 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)
GUARANTEED SAFE CHECKOUT
  • Visa Card
  • MasterCard
  • American Express
  • Discover Card
  • PayPal
  • Apple Pay

PLC Exchange is not an authorized distributor: Original Packaging is synonymous with Used Surplus. See Original Packaging or Warranty for more information.

SKU: 1756-L73S Categories: ,

Description

Allen-Bradley 1756-L73S

The 1756-L73S is an Allen-Bradley GuardLogix 5570 safety controller with 8 MB user memory and 4 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.

Tech Data (1756-TD001)

Controller Overview
Catalog Number 1756-L73S
Controller Type GuardLogix 5570 Safety Controller
User Memory 8 MB
Safety Memory 4 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)
Source: All specifications verified against Rockwell Automation Publication 1756-TD001W-EN-P, October 2025.

PLC Exchange Original Packaging is synonymous with Used Surplus. Because we are not an authorized distributor, we are not legally allowed to claim these items as “New”, “Factory Sealed”, or any other term that may imply such. We have over 10 years of experience working with trusted suppliers to make sure you receive the top-quality hardware you need. Used Surplus items ship in their original packaging, with the same function and contents as OEM-supplied materials. PLC Exchange is an independent supplier of industrial automation products and is not affiliated with the brand manufacturer or any of its authorized distributors. All warranties are provided directly by PLC Exchange. Trademarks, logos, and brand names referenced are property of their respective owners and are used for descriptive identification only.

Technical Notes for 1756-L73S

  • Refer to the manufacturer's installation instructions for proper mounting, wiring, and configuration.
  • Ensure compatibility with your existing system architecture before ordering.
  • All 1756-L73S 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-L73S

The 1756-L73S by Allen-Bradley may also be found under the following alternative names, catalog numbers, or common search variations:

  • 1756L73S
  • Allen Bradley 1756-L73S
  • Allen-Bradley 1756-L73S
  • 1756 L73S
  • 1756/L73S
  • ControlLogix 1756-L73S

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-L73S

manufacturer

Allen-Bradley

condition

Original Packaging

warranty

2.5 Year PLC Exchange Warranty, 30 Days worry-free return from delivery

upc

885630016481

Dimensions & Weight for 1756-L73S

Shipping Dimensions
Weight1.05 lbs
Length3.94 in
Width2.28 in
Height5.67 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.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Frequently Asked Questions

Where can I find the technical datasheet for the 1756-L73S?

The official manufacturer datasheet is available for download on the 1756-L73S product page at PLC Exchange. Look for the Tech Data PDF link in the product description.

What programming languages does the 1756-L73S support?

The 1756-L73S supports: LD, ST, FBD, SFC.

Does the 1756-L73S include a warranty?

Yes. Every 1756-L73S 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-L73S?

PLC Exchange offers a 30-day worry-free return policy. Eligibility and details: https://plcexchange.net/return-policy/

When will my 1756-L73S 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-L73S?

The 1756-L73S is manufactured by Allen-Bradley. PLC Exchange is an independent reseller specializing in Allen-Bradley industrial automation products.

More ControlLogix Products

View all ControlLogix products →