1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
    1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
    1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
    1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory
1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory

1756-L55 | Allen-Bradley ControlLogix Logix5555 Processor, No User Memory

Part #: 1756-L55 Manufactured by: Allen-Bradley
Regular price
$457.00
Sale price
$457.00
Regular price
6 in Stock
Condition: New-Surplus Original Box
Shipping calculated at checkout.
Product Overview
Allen-Bradley 1756-L55 ControlLogix Logix 5555 Processor, No User Memory
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Warranty for Product #: 1756-L55
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Product Description P/N: 1756-L55

Description / Specifications

Description 

The 1756-L55 processor module is part of the ControlLogix product family (Series A) by Allen-Bradley/Rockwell Automation. This processor module comes without any user memory and it features a backplane current of 1.23 to 1.25 Amps at 5.1 Volts DC or 0.014 Amps at 24 Volts DC. The unit has a power dissipation rating of 5.6 to 5.7 Watts and a thermal dissipation of 19.1 to 19.4 BTU per hour. The weight of the module is around 0.35 kilograms or 12.5 ounces.

 

Technical Specifications 

 

Condition New / Never Used Surplus
Brand Allen-Bradley
Series ControlLogix
Part Number 1756-L55
User memory None
Backplane current at 5.1 Volts DC 1.23 to 1.25 Amps
Backplane current at 24 Volts DC 0.014 Amps
Power dissipation 5.6 to 5.7 Watts
Thermal dissipation 19.1 to 19.4 BTU per hour
Isolation voltage 30 Volts (continuous)
Enclosure type None (Open-style)
Battery Included (1756-BA1)
Operating temperature 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)
Storage temperature -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit)

  

 

Information About 1756-L55

The 1756-L55 module is a processor module that is often used in ControlLogix industrial environments. This processor module is designed and produced by Allen-Bradley/Rockwell Automation and it is considered to be a component of high quality and top-level performance. The ControlLogix 1756 series provides various models of controllers and memory boards that are built in accordance with the North American and European industrial standards and regulations. This means that the 1756-L55 processor module meets the requirements of different IEC 60068 ratings in regard to the temperature, humidity, vibration, and shock tolerance.

The 1756-L55 processor module comes without any user memory but it includes a 1756-BA1 battery. The module has a backplane current of 1.23 to 1.25 Amps at 5.1 Volts DC and backplane current of 0.014 Amps at 24 Volts DC. The unit has an isolation voltage of 30 Volts (continuous) and it has a basic insulation type with an RS-232 communication port. In addition to that, it should be mentioned that this type of module is tested to withstand a voltage of 707 Volts DC for the duration of 60 seconds. The 1756-L55 module dissipates a power of 5.6 to 5.7 Watts and it has a thermal dissipation of 19.1 to 19.4 BTU per hour. The enclosure of the unit is open and its operating temperature ranges from 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit). The storage temperature range is -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit). The 1756-L55 module weighs around 0.35 kilograms or 12.5 ounces. Also, the product has a T4 IEC temperature code and it uses either the 1756-CP3 or 1747-CP3 serial cable.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 1756-L55
Question: What are the main features of the Allen-Bradley 1756-L55 processor module?
Date Update:04/06/2025
Answer:

The 1756-L55 is a ControlLogix Logix5555 processor module designed for high-performance industrial automation applications. It features a 100 MHz processor and supports up to 128 discrete and 128 analog I/O points. The module does not include internal user memory but is compatible with external memory modules for flexible data handling. It offers integrated communication via Ethernet, ControlNet, and DeviceNet, making it suitable for complex manufacturing environments.

Question: What are the power requirements and physical specifications of the 1756-L55 module?
Date Update:04/06/2025
Answer:

The 1756-L55 operates with a backplane current of 1.23 to 1.25 Amps at 5.1 Volts DC and 0.014 Amps at 24 Volts DC. It has a power dissipation rating of 5.6 to 5.7 Watts and a thermal dissipation of 19.1 to 19.4 BTU per hour. The module weighs approximately 0.35 kilograms (12.5 ounces) and is designed for open-style enclosures. It includes a 1756-BA1 battery for memory retention.

Question: What communication interfaces are supported by the 1756-L55 processor?
Date Update:04/06/2025
Answer:

The 1756-L55 processor module supports various communication options, including Ethernet, ControlNet, and DeviceNet networks. It also features an RS-232 serial port that supports communication protocols such as ASCII, DF1 full/half-duplex, DF1 radio modem, DH-485, and Modbus via logic functions.

Question: What are the operating and storage temperature ranges for the 1756-L55 module?
Date Update:04/06/2025
Answer:

The 1756-L55 is designed to operate within a temperature range of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit). For storage, it can withstand temperatures from -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit), making it suitable for various industrial environments.

Question: Does the 1756-L55 processor module come with user memory, and how is memory managed?
Date Update:04/06/2025
Answer:

The 1756-L55 processor module does not include internal user memory. However, it is compatible with external memory modules, allowing users to manage and store application programs and data as needed. This design provides flexibility in memory management for different application requirements.

IQElectro is not an authorized distributor.
QElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The 1756-L55 processor module is part of the ControlLogix product family (Series A) by Allen-Bradley/Rockwell Automation. This processor module comes without any user memory and it features a backplane current of 1.23 to 1.25 Amps at 5.1 Volts DC or 0.014 Amps at 24 Volts DC. The unit has a power dissipation rating of 5.6 to 5.7 Watts and a thermal dissipation of 19.1 to 19.4 BTU per hour. The weight of the module is around 0.35 kilograms or 12.5 ounces.

 

Technical Specifications 

 

Condition New / Never Used Surplus
Brand Allen-Bradley
Series ControlLogix
Part Number 1756-L55
User memory None
Backplane current at 5.1 Volts DC 1.23 to 1.25 Amps
Backplane current at 24 Volts DC 0.014 Amps
Power dissipation 5.6 to 5.7 Watts
Thermal dissipation 19.1 to 19.4 BTU per hour
Isolation voltage 30 Volts (continuous)
Enclosure type None (Open-style)
Battery Included (1756-BA1)
Operating temperature 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)
Storage temperature -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit)

  

 

Information About 1756-L55

The 1756-L55 module is a processor module that is often used in ControlLogix industrial environments. This processor module is designed and produced by Allen-Bradley/Rockwell Automation and it is considered to be a component of high quality and top-level performance. The ControlLogix 1756 series provides various models of controllers and memory boards that are built in accordance with the North American and European industrial standards and regulations. This means that the 1756-L55 processor module meets the requirements of different IEC 60068 ratings in regard to the temperature, humidity, vibration, and shock tolerance.

The 1756-L55 processor module comes without any user memory but it includes a 1756-BA1 battery. The module has a backplane current of 1.23 to 1.25 Amps at 5.1 Volts DC and backplane current of 0.014 Amps at 24 Volts DC. The unit has an isolation voltage of 30 Volts (continuous) and it has a basic insulation type with an RS-232 communication port. In addition to that, it should be mentioned that this type of module is tested to withstand a voltage of 707 Volts DC for the duration of 60 seconds. The 1756-L55 module dissipates a power of 5.6 to 5.7 Watts and it has a thermal dissipation of 19.1 to 19.4 BTU per hour. The enclosure of the unit is open and its operating temperature ranges from 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit). The storage temperature range is -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit). The 1756-L55 module weighs around 0.35 kilograms or 12.5 ounces. Also, the product has a T4 IEC temperature code and it uses either the 1756-CP3 or 1747-CP3 serial cable.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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