1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
    1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
    1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
    1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
    1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
    1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory
1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory

1756-L61 | Allen-Bradley ControlLogix Logix5561 Processor 2MB Memory

Part #: 1756-L61 Manufactured by: Allen-Bradley
Regular price
$430.00
Sale price
$430.00
Regular price
4 in Stock
Condition: New-Surplus Original Box
Shipping calculated at checkout.
Product Overview
The 1756-L61 is a controller module for the ControlLogix Modular Programmable Automation Controller (PAC) by Allen-Bradley...  Read more
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Product Description P/N: 1756-L61

Description / Specifications

Description 

The Allen-Bradley 1756-L61 is a ControlLogix 5561 controller designed for large-scale automation and process control applications. It provides 2 MB of user memory and 478 KB of I/O memory, supporting up to 250 controller connections. With integrated serial communication and support for multiple industrial networks, this chassis-based controller is widely used in manufacturing, process, and motion control systems.

 

 

Technical Specifications 

Condition New / Never Used Surplus
Brand Allen-Bradley
Series ControlLogix
Part Number 1756-L61
Manufacturer Rockwell Automation
Fixed Memory 2, 4, or 8 MB
Module Type Processor Module
Nonvolatile Memory Compact Flash Card 1784-CF128
Maximum I-O 128,000
Communication RS-232 serial port
RS232 Protocols ASCII DF1 full/half-duplex DF1 radio modem DH-485 Modbus via logic
Maximum Analog I-O 4,000
Program Scan Time 0.08 milliseconds
User Memory 2MB
Backplane Current (5Volts DC) 1.2 Amps
Backplane Current (24 Volts DC) 14 milliamps
Vibration 10-500 Hertz
Relative Humidity 5-95 percent
Battery 1756-BA1, 1756-BATM or 1756-BATA

  

 

Information About 1756-L61

The 1756-L61 belongs to the ControlLogix family of controllers, offering high-performance processing and flexible system integration. Installed in any slot of a 1756 chassis (A4, A7, A10, A13, A17), it provides modular scalability for diverse control applications. The controller supports up to 128,000 digital and 4,000 analog I/O points. It allows up to 32 tasks and 100 programs per task, with event task triggering for responsive applications. An RS-232 serial port provides direct communication using DF1 full/half duplex, ASCII, DF1 radio modem, Modbus (via logic), and DH-485 protocols. Non-volatile memory is available through a 1784-CF128 CompactFlash card for up to 128 MB of storage. The module also supports removal and insertion under power (RIUP), enhancing maintainability. With programming flexibility across ladder logic, structured text, function block, and sequential function charts, the 1756-L61 is well-suited for complex automation systems.

Key Features:

  • Design: ControlLogix 5561 chassis-based programmable automation controller.
  • Memory: 2 MB user memory and 478 KB I/O memory; expandable with 1784-CF128 CompactFlash.
  • Connections: Supports up to 250 controller connections.
  • I/O Capacity: 128,000 digital I/O, 4,000 analog I/O, 128,000 total I/O points.
  • Processing: 32 tasks and 100 programs per task with event task triggering.
  • Communication: Built-in RS-232 port supporting DF1, ASCII, DH-485, Modbus (via logic).
  • Networks: Compatible with EtherNet/IP, ControlNet, and DeviceNet via communication modules.
  • Programming Languages: Supports ladder logic, structured text, function block, and SFC.
  • Maintenance: Supports removal and insertion under power (RIUP) and replaceable battery backup.
  • Chassis Compatibility: Works with 1756-A4, A7, A10, A13, and A17 chassis.

The 1756-L61 delivers robust performance and flexibility, making it a reliable choice for high-demand industrial automation applications.



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-L61
Question: What is the 1756-L61 ControlLogix PLC?
Date Update:28/05/2025
Answer:

The 1756-L61 is an Allen-Bradley ControlLogix 5561 series programmable logic controller (PLC). It is designed to handle complex control systems and is ideal for large-scale automation systems that require high processing power, flexible I/O configuration, and extensive communication capabilities. The 1756-L61 supports the Ethernet/IP communication protocol and integrates seamlessly with other ControlLogix and CompactLogix controllers.

Question: How do I program the 1756-L61?
Date Update:28/05/2025
Answer:

The 1756-L61 is programmed using Studio 5000 Logix Designer software, which is the standard software environment for Allen-Bradley’s ControlLogix controllers. The software allows you to create programs using ladder logic, structured text, and function block diagrams. Once the program is created, it can be downloaded to the 1756-L61 over Ethernet or a serial connection.

Question: What is the memory capacity of the 1756-L61?
Date Update:28/05/2025
Answer:

The 1756-L61 has 2 MB of user memory, which is used to store the control program, data tables, and configuration settings. This amount of memory is suitable for medium-to-large automation systems with complex logic, large data sets, or extensive communication requirements.

Question: How do I back up and restore the program on the 1756-L61?
Date Update:28/05/2025
Answer:

You can back up and restore the program on the 1756-L61 using Studio 5000 Logix Designer software. The program can be saved to USB drives, network storage, or external storage media for safekeeping. The backup allows easy recovery in case of failure or system changes.

Question: What is the operating temperature range for the 1756-L61?
Date Update:28/05/2025
Answer:

The 1756-L61 is designed to operate in industrial environments with an operating temperature range of 0°C to 60°C (32°F to 140°F). For environments with extreme temperatures, additional cooling or environmental controls may be required to maintain the system’s reliability.

IQElectro is not an authorized distributor.
IQElectro 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 Allen-Bradley 1756-L61 is a ControlLogix 5561 controller designed for large-scale automation and process control applications. It provides 2 MB of user memory and 478 KB of I/O memory, supporting up to 250 controller connections. With integrated serial communication and support for multiple industrial networks, this chassis-based controller is widely used in manufacturing, process, and motion control systems.

 

 

Technical Specifications 

Condition New / Never Used Surplus
Brand Allen-Bradley
Series ControlLogix
Part Number 1756-L61
Manufacturer Rockwell Automation
Fixed Memory 2, 4, or 8 MB
Module Type Processor Module
Nonvolatile Memory Compact Flash Card 1784-CF128
Maximum I-O 128,000
Communication RS-232 serial port
RS232 Protocols ASCII DF1 full/half-duplex DF1 radio modem DH-485 Modbus via logic
Maximum Analog I-O 4,000
Program Scan Time 0.08 milliseconds
User Memory 2MB
Backplane Current (5Volts DC) 1.2 Amps
Backplane Current (24 Volts DC) 14 milliamps
Vibration 10-500 Hertz
Relative Humidity 5-95 percent
Battery 1756-BA1, 1756-BATM or 1756-BATA

  

 

Information About 1756-L61

The 1756-L61 belongs to the ControlLogix family of controllers, offering high-performance processing and flexible system integration. Installed in any slot of a 1756 chassis (A4, A7, A10, A13, A17), it provides modular scalability for diverse control applications. The controller supports up to 128,000 digital and 4,000 analog I/O points. It allows up to 32 tasks and 100 programs per task, with event task triggering for responsive applications. An RS-232 serial port provides direct communication using DF1 full/half duplex, ASCII, DF1 radio modem, Modbus (via logic), and DH-485 protocols. Non-volatile memory is available through a 1784-CF128 CompactFlash card for up to 128 MB of storage. The module also supports removal and insertion under power (RIUP), enhancing maintainability. With programming flexibility across ladder logic, structured text, function block, and sequential function charts, the 1756-L61 is well-suited for complex automation systems.

Key Features:

  • Design: ControlLogix 5561 chassis-based programmable automation controller.
  • Memory: 2 MB user memory and 478 KB I/O memory; expandable with 1784-CF128 CompactFlash.
  • Connections: Supports up to 250 controller connections.
  • I/O Capacity: 128,000 digital I/O, 4,000 analog I/O, 128,000 total I/O points.
  • Processing: 32 tasks and 100 programs per task with event task triggering.
  • Communication: Built-in RS-232 port supporting DF1, ASCII, DH-485, Modbus (via logic).
  • Networks: Compatible with EtherNet/IP, ControlNet, and DeviceNet via communication modules.
  • Programming Languages: Supports ladder logic, structured text, function block, and SFC.
  • Maintenance: Supports removal and insertion under power (RIUP) and replaceable battery backup.
  • Chassis Compatibility: Works with 1756-A4, A7, A10, A13, and A17 chassis.

The 1756-L61 delivers robust performance and flexibility, making it a reliable choice for high-demand industrial automation applications.



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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