Allen-Bradley 1756-L73 ControlLogix PLC Controller
$4,794.15
Out of stock
Request QuoteThe 1756-L73 is an Allen-Bradley ControlLogix 5570 controller with 8 MB user memory and USB 2.0. Requires a separate communication module for EtherNet/IP connectivity (up to 500 (via comm modules)). Supports up to 128,000 digital I/O points and 4,000 analog I/O points. Programs in Ladder Diagram, Structured Text, Function Block, and SFC.
| User Memory | 8 MB |
| EtherNet/IP Nodes | 500 (via comm modules) |
| Comms | 1 USB 2.0 (no embedded Ethernet — requires separate comm module) |
| Programming | LD, ST, FBD, SFC |
| Slot Width | 1 slot, any slot |
| Platform | ControlLogix (1756) |
PLC Exchange is not an authorized distributor: Products ship in unopened, original manufacturer-marked packaging. See Original Packaging or Warranty for more information.
Description
Allen-Bradley 1756-L73
The 1756-L73 is an Allen-Bradley ControlLogix 5570 controller with 8 MB user memory and 0.98 MB I/O memory. Requires a separate communication module (e.g., 1756-EN2TR) for EtherNet/IP connectivity, supporting up to 500 (via comm modules). Handles up to 128,000 digital I/O and 4,000 analog I/O points with 500 controller connections. Includes 1756-ESMCAP energy storage module and 1 GB SD card slot for nonvolatile storage.
| Controller Overview | |
|---|---|
| Catalog Number | 1756-L73 |
| Controller Type | ControlLogix 5570 Standard Controller |
| User Memory | 8 MB |
| I/O Memory | 0.98 MB |
| Digital I/O Max | 128,000 |
| Analog I/O Max | 4,000 |
| Total I/O Max | 128,000 |
| Controller Connections | 500 |
| EtherNet/IP Nodes | 500 (via comm modules) |
| 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) |
| EtherNet/IP Nodes | 500 (via comm modules) |
| Physical & Environmental | |
|---|---|
| Weight | 0.25 kg (0.55 lb) |
| Slot Width | 1 slot, any slot |
| Operating Temp | 0…60 °C |
| Nonvolatile Storage | 1 GB SD card (1784-SD1) |
| Energy Storage | 1756-ESMCAP (ships with controller) |
PLC Exchange products ship in their unopened, manufacturer-marked Original Packaging. 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. 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.
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-L73
- Mounts on standard 35mm DIN rail with direct side-bus connection to Compact 5000 I/O modules.
- Program using Studio 5000 Logix Designer software (v30 or later recommended).
- Firmware updates available through ControlFLASH or ControlFLASH Plus.
- User memory capacity is 8 MB. Consider application size requirements when selecting a controller.
- All 1756-L73 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-L73
The 1756-L73 by Allen-Bradley may also be found under the following alternative names, catalog numbers, or common search variations:
- 1756L73
- Allen Bradley 1756-L73
- Allen-Bradley 1756-L73
- 1756 L73
- 1756/L73
- ControlLogix 1756-L73
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 | 0.9 lbs |
|---|---|
| Dimensions | 3.94 × 3.35 × 5.67 in |
| mpn | 1756-L73 |
| manufacturer | Allen-Bradley |
| condition | Original Packaging |
| warranty | 2.5 Year PLC Exchange Warranty, 30 Days worry-free return from delivery |
| upc | 612598876037 |
Dimensions & Weight for 1756-L73
| Shipping Dimensions | |
|---|---|
| Weight | 0.9 lbs |
| Length | 3.94 in |
| Width | 3.35 in |
| Height | 5.67 in |
| Box Dimensions (L×W×H) | 3.94 × 3.35 × 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
How much user memory does the 1756-L73 have?
The 1756-L73 has 8 MB of user memory for program and data storage.
How many EtherNet/IP nodes does the 1756-L73 support?
The 1756-L73 supports up to 500 (via comm modules) EtherNet/IP nodes.
What product family does the 1756-L73 belong to?
The 1756-L73 is part of the Allen-Bradley ControlLogix family of industrial automation products.
Where can I find the technical datasheet for the 1756-L73?
The official manufacturer datasheet is available for download on the 1756-L73 product page at PLC Exchange. Look for the Tech Data PDF link in the product description.
What programming languages does the 1756-L73 support?
The 1756-L73 supports: LD, ST, FBD, SFC.
Does the 1756-L73 include a warranty?
Yes. Every 1756-L73 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-L73?
PLC Exchange offers a 30-day worry-free return policy. Eligibility and details: https://plcexchange.net/return-policy/
When will my 1756-L73 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-L73?
The 1756-L73 is manufactured by Allen-Bradley. PLC Exchange is an independent reseller specializing in Allen-Bradley industrial automation products.
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