PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1756-L72 LOGIX5572 is a ControlLogix Logix5572 Processor designed for the ControlLogix system architecture. It features 4 MB of user memory and 0.98 MB of dedicated I/O memory. The unit includes a pre-installed 1784-SD1 1 GB Secure Digital non-volatile memory card. It accommodates up to 128,000 discrete I/O points and 4,000 analog I/O points across the control system. The module mounts directly into any slot of a 1756 chassis. It draws 5 mA at 1.2V DC and 800 mA at 5.1V DC backplane power.
The controller uses an embedded 1756-ESMCAP capacitor-based energy storage module instead of lithium batteries. This energy storage module preserves volatile memory during power outages without battery maintenance. It provides an integrated USB communication port for programming and online diagnostics. Execution capacity supports up to 32 tasks with 100 programs allowed per task. Supported programming languages include Relay Ladder Logic, Structured Text, Function Block Diagram, and Sequential Function Chart. Maximum power dissipation is 2.5 W, and thermal dissipation reaches 8.5 BTU per hour.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Product Line | ControlLogix |
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| Weight | 2.00 lbs (0.91 kg) |
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| Module Type | Processor Module |
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| Member Part Number/Catalog Nos | 1756-L72, -1756-L72K |
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| Non-volatile memory | 1 GB |
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| Discrete I/O | 128000 |
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| Analog I/O | 4000 |
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| Integrated motion | SERCOS interface; Analog options (encoder input, LDT input, SSI input) Integrated Motion on the EtherNet/IP network |
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| Communication Ports | One (1) USB |
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| No. of tasks | 32 |
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| Programs / task | 100 |
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| Programming languages | Relay ladder logic Structured text Function Block Diagram Sequential function chart (SFC) |
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| I-O Memory | 0.98 MB |
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| User Memory | 4 MB |
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| Maximum I-O | 128,000 |
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| Maximum Analog I-O | 4,000 |
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| Maximum Digital I-O | 128,000 |
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| Current Draw (1.2 Volts DC) | 5 milliamps |
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| Current Draw (5.1 Volts) | 800 milliamps |
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| Power Dissipation | 2.5 Watts |
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| Thermal Dissipation | 8.5 BTU per hour |
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| Isolation Voltage | 30 Volts Continuous |
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| Enclosure | None |
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TECHNICAL INFORMATION
Features
- Provides 4 MB of user memory and 0.98 MB of dedicated I/O memory.
- Features an embedded 1756-ESMCAP capacitor energy storage module to replace lithium batteries.
- Includes a pre-installed 1784-SD1 1 GB Secure Digital non-volatile memory card.
- Contains an integrated onboard USB port for controller programming and diagnostics.
- Supports up to 32 execution tasks with 100 programs per task.
- Supports full controller redundancy and Removal and Insertion Under Power.
- Includes an onboard display providing run-time controller status and diagnostic details.
TECHNICAL INFORMATION
Applications
- Discrete manufacturing systems requiring high-speed sequencing and interlock logic.
- Industrial motion control applications using SERCOS protocol or EtherNet/IP networks.
- Process control architectures needing coordinated continuous and periodic execution tasks.
TECHNICAL INFORMATION
Connections / Interfaces
- One integrated USB communication port on the front panel.
- Direct interface to ControlLogix backplane supporting 1.2V DC and 5.1V DC.
- Supports EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, and SynchLink modules.
- Supports motion over EtherNet/IP and SERCOS interface communication modules.
TECHNICAL INFORMATION
Installation Guidelines
- Install the controller into any available slot in a 1756 ControlLogix chassis.
- Multiple controllers can reside in the same physical chassis.
- The module supports Removal and Insertion Under Power without halting chassis backplane operation.
- Verify that the chassis power supply can supply 800 mA at 5.1V DC.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure up to 32 continuous or periodic tasks in programming software.
- Assign up to 100 programs per periodic task using available triggers.
- Program using Relay Ladder Logic, Structured Text, Function Block Diagram, or Sequential Function Chart.
TECHNICAL INFORMATION
Compatibility
- Compatible with standard Allen-Bradley 1756 ControlLogix chassis.
- Accepts 1784-SD1 and 1784-SD2 Secure Digital cards for non-volatile storage.
- Energy storage module can be replaced with 1756-ESMNSE or 1756-ESMNRM modules.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Belongs to the Allen-Bradley ControlLogix 5570 controller family.
- The 1756-L72K provides a conformally coated alternative for harsh or corrosive operating environments.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with standard Allen-Bradley 1756 ControlLogix chassis. Accepts 1784-SD1 and 1784-SD2 Secure Digital cards for non-volatile storage. Energy storage module can be replaced with 1756-ESMNSE or 1756-ESMNRM modules.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the memory capacity of the 1756-L72 LOGIX5572 controller?
The Allen-Bradley 1756-L72 LOGIX5572 processor provides 4 MB of user memory. It also includes 0.98 MB of dedicated I/O memory.
Does the 1756-L72 controller require lithium backup batteries?
No. The 1756-L72 uses a capacitor-based 1756-ESMCAP energy storage module to retain memory during power outages.
What are the backplane power requirements for this ControlLogix processor?
The unit draws 5 mA at 1.2V DC and 800 mA at 5.1V DC from the chassis backplane.
What is the reference price for an Allen-Bradley 1756-L72 controller?
Verified market observations show an indicative reference price of 1,790.00 USD for refurbished units. This figure is an indicative market reference only and is not a final quotation.
