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Brand: Allen-Bradley
Allen-Bradley 1756-L83E ControlLogix 5580 Controller 10 MB
Description
A 10 MB ControlLogix 5580 controller for mid-size plants
The Allen-Bradley 1756-L83E sits in the middle of the ControlLogix 5580 range: 10 MB of standard user memory, a built-in gigabit EtherNet/IP port and a USB programming port, all in a single-slot module that plugs into any slot of a 1756 chassis. Rockwell Automation lists it with a four-character alphanumeric display and support for up to 256 motion axes.
Within the 5580 family the memory step is 3, 5, 10, 20 and 40 MB for the L81E, L82E, L83E, L84E and L85E. The L83E is the one most often quoted for process skids, compressor and pump-station packages and utility plants where the program is too big for a 5 MB controller but a 40 MB machine would be wasted.
Technical specifications
| Parameter | Specification |
|---|---|
| Catalog number | 1756-L83E (conformal-coated variant 1756-L83EK, listed separately by the manufacturer) |
| Standard user memory | 10 MB |
| Digital I/O, max | 128,000 |
| Analog I/O, max | 4000 |
| OPC UA nodes, max | 1200 |
| Motion axes supported | 256 (product page) |
| Built-in ports | 1 embedded 10/100/1000 Mbps Ethernet port; 1 USB 2.0 port (programming, configuration, firmware update, online edits only) |
| Class 0/1 I/O capacity | 128,000 packets/s without CIP Security; 40,000 with integrity; 20,000 with integrity and confidentiality |
| Class 3 messages, front port | 2000/s without CIP Security |
| Non-volatile memory | 4 GB Secure Digital card (1784-SD4), pre-installed |
| Energy storage | Embedded in controller, non-removable; 80,000 power cycles |
| Backplane current | 5.0 mA at 1.2 V DC; 1.20 A at 5.1 V DC |
| Power dissipation | 6.2 W (21.2 BTU/hr) |
| Weight, approx | 0.394 kg (0.868 lb) |
| Operating temperature | 0 to +60 C in Series C chassis; 0 to +50 C in Series B chassis |
| Programming languages | Relay ladder, structured text, function block diagram, sequential function chart |
| Enclosure type rating | None (open-style); temperature code T4 |
Platform fit and approvals
The 5580 controllers use the same 1756 chassis, power supplies and I/O as the earlier 5570 line, so an L83E can often be introduced into an existing ControlLogix rack. The technical data lists chassis 1756-A4 through 1756-A17 and power supplies 1756-PA72, PA75, PB72, PB75, PC75 and PH75, with redundant supplies 1756-PA75R, PB75R and PSCA2. Additional communication networks (ControlNet, DeviceNet, Data Highway Plus, remote I/O and SERCOS) are reached through separate 1756 modules, and integrated motion over EtherNet/IP is supported.
As printed in the technical data for the 5580 standard controllers: UL Listed industrial control equipment (UL file E65584) and UL Class I Division 2 Groups A to D (file E194810), FM Class I Division 2, CE, UKCA, RCM, KC and CCC. For hazardous areas the document gives ATEX II 3 G Ex ec IIC T4 Gc (UL 22 ATEX 2817X) and IECEx UL 22.0062X. EtherNet/IP conformance and CIP Security conformance are listed, with TUV certification to IEC 62443-4-2 SL1 for security. The USB port is for temporary local use and must not be used in a hazardous location.
Selection and ordering notes
Confirm the exact suffix before ordering: E is the standard module, EK is conformal coated for corrosive atmospheres, and the XT, NSE, EP and ES families are separate catalog numbers with their own data. Check the chassis series (Series B limits the ambient to 50 C), the firmware revision you need for your Studio 5000 Logix Designer version, and whether the 4 GB SD card supplied is sufficient. Data on this page is taken from the manufacturer documents and should be checked against them and your project specification before purchase.
Documents and quotation
The linked document is the manufacturer technical data covering the whole 1756 controller range; the L83E column is on the 5580 standard controller tables. Browse more PLC hardware in the PLC & I/O Cards category, or send the catalog number with your quantity and delivery location to Seven Star LLC, an independent supplier in Muscat, for a quotation.
Datasheets & Documents
- Technical data Rockwell Automation 1756 ControlLogix and GuardLogix Controller Specifications, publication 1756-TD001 Download
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About brand
Allen-Bradley is the brand of Rockwell Automation for industrial control: ControlLogix and CompactLogix controllers, I/O systems, PanelView operator terminals, PowerFlex drives, motor control and industrial network equipment. The company began in Milwaukee in 1903, when Lynde Bradley and Dr. Stanton Allen formed the Compression Rheostat Company to make the motor speed controller Bradley had invented in 1901. It took the name Allen-Bradley in 1909 and was bought by Rockwell International in 1985. Since 2001 its owner has been Rockwell Automation, which is still headquartered in Milwaukee, Wisconsin.
Allen-Bradley company profile
| Founded | 1903, Milwaukee, Wisconsin, USA, as the Compression Rheostat Company |
|---|---|
| Founders | Lynde Bradley (inventor of the compression rheostat, 1901) and Dr. Stanton Allen (investor); Harry Bradley joined in 1904 |
| Name | Allen-Bradley Company from 1909 |
| Ownership | Acquired by Rockwell International in 1985 for about USD 1.65 billion; a brand of Rockwell Automation (NYSE: ROK) since 2001 |
| Headquarters | Milwaukee, Wisconsin, USA |
| Product families | Logix programmable automation controllers (ControlLogix, CompactLogix), legacy SLC 500 and MicroLogix PLCs, Micro800 controllers, POINT, FLEX and Compact I/O, PanelView HMIs, PowerFlex AC drives, contactors, motor starters and soft starters, safety components, Stratix Ethernet switches |
Milestones
- 1901: Lynde Bradley invents the compression rheostat to control the speed of electric motors.
- 1903: The Compression Rheostat Company is formed in Milwaukee with an initial investment of USD 1,000.
- 1904: Harry Bradley joins; a crane controller is shown at the St. Louis World's Fair.
- 1909: The company is renamed Allen-Bradley.
- 1985: Rockwell International acquires Allen-Bradley.
- 2001: Rockwell Automation becomes the company's name; the Allen-Bradley brand marks 100 years in 2003.
Reading Allen-Bradley catalogue numbers
The first digits of an Allen-Bradley catalogue number identify the platform, which tells you what is compatible with what. 1756 is ControlLogix (chassis-based, used for large process and plant control), 1769 is CompactLogix 5370 with Compact I/O, 5069 is CompactLogix 5380 with Compact 5000 I/O, 1734 is POINT I/O, 1794 and 5094 are FLEX and FLEX 5000 distributed I/O, 1746 and 1747 belong to the older SLC 500 family, 1766 is MicroLogix 1400 and 2080 is Micro800. For drives, 25B is PowerFlex 525 and 22B is PowerFlex 40; in a code such as 25B-D010N114, "D" means 380–480 V, "010" is the output current rating, and N114 instead of N104 means the drive has an integrated EMC filter. Many plants in the region still run SLC 500 and older MicroLogix systems, which Rockwell has discontinued, so exact spares and migration to CompactLogix are both common requests.
Where Allen-Bradley products are used
In Oman and the GCC, Allen-Bradley controllers and drives run on oil and gas facilities, water treatment and pumping stations, cement, food and beverage and packaging plants, and on machines supplied by American OEMs. ControlLogix is often the platform for plant control systems, while PowerFlex drives are used on pumps, fans and conveyors.
Allen-Bradley products we list
| Family | Examples |
|---|---|
| ControlLogix | 1756-L85E, 1756-EN2T, 1756-EN2TR, 1756-IF16, 1756-IB32, 1756-PA75, 1756-A10 |
| CompactLogix and Micro controllers | 5069-L320ER, 5069-L340ERM, 1769-L33ER, 1769-L16ER, MicroLogix 1400, Micro820, SLC 500 (1746) |
| Distributed I/O | 1734-AENTR, 1734-IB8, 1734-IE2C, 1734-IB8S safety, 1794-AENTR, 5094-AENTR, 5069-IF8 |
| Operator terminals | PanelView Plus 7 10-inch, PanelView Plus 7 15-inch, PanelView 800, PanelView 5310 |
| Drives, motor control and networking | PowerFlex 525, PowerFlex 755, PowerFlex 4, 150-A180NBD SMC, Stratix 2000, 1783-NATR |
Ordering Allen-Bradley products: what we need
Send the full catalogue number and the series letter from the label (for example 1756-EN2T Series D), because firmware and compatibility can change between series. For drives, add the motor power, voltage and filter option. For a discontinued SLC 500 or MicroLogix part, tell us whether you need the exact spare or a migration proposal.
Facts checked against Rockwell Automation's published company history, October 2026.
Browse Allen-Bradley products by category: PLC & I/O Cards, AC Drives.
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Frequently Asked Questions
How much memory does the 1756-L83E have?
10 MB of standard user memory, with 128,000 digital and 4000 analog I/O points as the maximum.
What communication ports are built in?
One 10/100/1000 Mbps EtherNet/IP port and one USB 2.0 port that is limited to programming, configuration, firmware update and online edits.
Does it need a battery?
The technical data lists a non-removable embedded energy storage module and a pre-installed 4 GB SD card for non-volatile storage.
Which chassis and power supplies can it use?
Chassis 1756-A4 to 1756-A17 and the listed 1756-PA/PB/PC/PH power supplies; it can sit in any slot.
Is there a conformal-coated version?
Yes, the manufacturer lists 1756-L83EK separately for corrosive environments; confirm the exact catalog number when ordering.
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