Allen-Bradley 1756-L55 ControlLogix Processor Module
$123.00
$320.00
Description
Product Description
The Allen-Bradley 1756-L55 is a ControlLogix Series A processor module developed for high-performance industrial automation and centralized control applications. As part of the Rockwell Automation ControlLogix platform, this controller delivers deterministic processing performance for complex machine control, process coordination, and distributed I/O management.
The 1756-L55 processor is designed for installation in ControlLogix chassis systems and communicates across the high-speed backplane architecture used throughout the 1756 platform. This controller version is supplied without onboard user memory and operates with external memory architecture specific to early-generation Logix5555 systems.
Built for continuous industrial operation, the module includes integrated status diagnostics, battery-backed memory retention capability, and support for modular ControlLogix communication and I/O expansion. The processor is commonly deployed in legacy manufacturing systems, material handling equipment, and process automation environments where stable ControlLogix integration is required.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Model Number | 1756-L55 |
| Product Family | ControlLogix |
| Controller Series | Logix5555 |
| Product Type | Processor Module |
| User Memory | None Installed |
| Backplane Current @ 5.1 VDC | 1.23–1.25 A |
| Backplane Current @ 24 VDC | 14 mA |
| Power Dissipation | 5.6–5.7 W |
| Thermal Dissipation | 19.1–19.4 BTU/hr |
| Isolation Voltage | 30 V Continuous |
| Battery Type | 1756-BA1 Lithium Battery |
| Chassis Compatibility | ControlLogix 1756 Chassis |
| Mounting Style | Rack Mounted |
| Enclosure Requirement | Open-Type Equipment |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Weight | 0.35 kg |
| Module Status Indicators | Integrated LED Diagnostics |
| Platform Architecture | Modular PLC/PAC Control System |
Functional Characteristics
-
Designed for ControlLogix modular automation systems
-
Compatible with distributed I/O and communication modules
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Supports deterministic industrial control operations
-
Battery-backed retention for controller memory functions
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High-speed backplane communication architecture
-
Rack-mounted modular installation
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Suitable for legacy ControlLogix migration and maintenance projects
-
Engineered for 24-hour industrial runtime environments
System Compatibility
The 1756-L55 processor operates with standard ControlLogix chassis and supports integration with:
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1756 ControlLogix I/O modules
-
EtherNet/IP communication modules
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ControlNet and DeviceNet interfaces
-
Remote distributed I/O architectures
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FactoryTalk-enabled supervisory systems
Proper firmware compatibility should be verified before installation in existing systems.
Typical Applications
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Manufacturing automation systems
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PLC-based machine control
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Material handling and conveyor systems
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Packaging and assembly equipment
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Industrial process control
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Automotive production lines
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Legacy ControlLogix upgrades
-
Distributed plant control architectures
FAQ
Does the 1756-L55 include onboard user memory?
No. The 1756-L55 version referenced here is supplied without user memory installed.
Which battery is used with the 1756-L55?
The controller uses the Allen-Bradley 1756-BA1 lithium battery for memory retention.
Can the processor be installed in any ControlLogix chassis slot?
Yes. The module is designed for standard installation within compatible 1756 ControlLogix racks.
Is the 1756-L55 suitable for new automation projects?
The processor is primarily used in existing legacy ControlLogix systems. For new installations, newer ControlLogix controllers are generally recommended.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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