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Allen-Bradley 1756-L61
Allen-Bradley 1756-L61
Prominent among ControlLogix programmable automation controllers (PACs) is the Allen-Bradley 1756-L61, which was developed to satisfy the needs of networking applications and complicated, high-speed machinery. Debuting as a high-performance answer to industrial automation, this controller greatly improved memory, processing speed, and I/O capabilities. Although it is no longer manufactured, its adaptability and durability made it an indispensable part of numerous industrial control systems.
Technical Specifications
Despite its obsolescence, the 1756-L61 was an early pioneer in the use of sophisticated control methods. Despite the products lifetime status as discontinued, it is still useful in many older systems due to the rapid advancement of automation technologies. To accommodate a wide range of application sizes and complexity levels, it comes with a fixed memory capacity that can be 2, 4, or 8 MB.
The 1756-L61 uses a tiny flash card, more precisely the 1784-CF128, for non-volatile memory; thus, data and programs are stored even when the power goes out. The maximum number of input/output (I/O) points on the controller is 128,000, allowing for comprehensive interfacing with various sensors, actuators, and other devices.
The RS-232 serial port allows for easy and dependable communication, making it ideal for networking, programming, and monitoring. Applications requiring accurate monitoring and control of analog signals, such as temperature, pressure, and flow rates, are well-suited to the controllers capabilities, which include a maximum of 4000 analog I/O points.
With a scan time of under 0.08 ms, the 1756-L61 enables lightning-fast processing and responsiveness”which is crucial in mission-critical applications. There is enough room for complicated programs and data storage in the 2 MB of user memory. The controller is physically small and light, measuring in at only 0.32 kg, making it easy to install and handle in a wide range of industrial settings.
Operating Conditions
Industrial settings are no match for the 1756-L61. Because of its sturdy build and capacity to withstand situations with substantial mechanical movements, it continues to function consistently under vibrations ranging from 10-500 Hz. This controller is great for both dry and wet environments because it works well in a wide range of relative humidity, from 5% to 95%.
The 1756-L61 can function across a wide range of temperatures, demonstrating its temperature resilience. Because of this feature, the product will work reliably in a variety of industrial environments with frequent temperature changes.
Applications
Many different types of industrial applications have made heavy use of the 1756-L61. It is perfect for complicated automation jobs in processing plants, manufacturing, and other industrial settings due to its capacity to manage a large number of I/O points. Applications needing accurate control and quick reaction, like those in the automotive, pharmaceutical, and food and beverage processing industries, are well-suited to the controllers powerful processing capabilities and sturdy architecture.
Despite being retired, the 1756-L61 is still integral to numerous current automation systems, attesting to its enduring influence and dependability. A key component in developing programmable controllers, its versatility, robustness, and accuracy have left an indelible mark on industrial automation.
Frequently Asked Questions:
In the 1756-L61, what kinds of nonvolatile memory are available?
Nonvolatile memory options supported: 128MB to 64MB CompactFlash. These offer reliable storage for critical data in a variety of capacities.
At what rate of tasks and programs per task is the 1756-L61 capable of handling?
The controller manages 32 jobs, each supporting up to 100 programs, ensuring efficient multitasking and program execution within defined task boundaries.
Can more than one 1756-L61 controller be installed in the same chassis?
Absolutely, the chassis facilitates independent operation of multiple 1756-L61 controllers, enabling robust and scalable control system configurations within a single unit.
Product Specification Table
| Attributes | Specification |
|---|---|
| Product Type | ControlLogix 2 MB Memory Controller |
| Lifecycle Status | Discontinued as of June 1, 2017 |
| Communication Interface | ControlLogix series |
| Software Compatibility | Compatible with the ControlLogix software suite |
| Ambient Temperature Range | 0 to 60 °C |
| Control Method | Programmable Logic Control |
| Scan Time | 0.08ms |
| Mounting Type | Rack-mounted |
| Scan Time | 0.08 ms |
| Weight | 0.32 kg |
All products (new, refurbished, and repairs) are covered by the Industrial Automation Company's 2 Year Warranty. Manufacturer's Warranty does not apply.
Description
Allen-Bradley 1756-L61
Prominent among ControlLogix programmable automation controllers (PACs) is the Allen-Bradley 1756-L61, which was developed to satisfy the needs of networking applications and complicated, high-speed machinery. Debuting as a high-performance answer to industrial automation, this controller greatly improved memory, processing speed, and I/O capabilities. Although it is no longer manufactured, its adaptability and durability made it an indispensable part of numerous industrial control systems.
Technical Specifications
Despite its obsolescence, the 1756-L61 was an early pioneer in the use of sophisticated control methods. Despite the products lifetime status as discontinued, it is still useful in many older systems due to the rapid advancement of automation technologies. To accommodate a wide range of application sizes and complexity levels, it comes with a fixed memory capacity that can be 2, 4, or 8 MB.
The 1756-L61 uses a tiny flash card, more precisely the 1784-CF128, for non-volatile memory; thus, data and programs are stored even when the power goes out. The maximum number of input/output (I/O) points on the controller is 128,000, allowing for comprehensive interfacing with various sensors, actuators, and other devices.
The RS-232 serial port allows for easy and dependable communication, making it ideal for networking, programming, and monitoring. Applications requiring accurate monitoring and control of analog signals, such as temperature, pressure, and flow rates, are well-suited to the controllers capabilities, which include a maximum of 4000 analog I/O points.
With a scan time of under 0.08 ms, the 1756-L61 enables lightning-fast processing and responsiveness”which is crucial in mission-critical applications. There is enough room for complicated programs and data storage in the 2 MB of user memory. The controller is physically small and light, measuring in at only 0.32 kg, making it easy to install and handle in a wide range of industrial settings.
Operating Conditions
Industrial settings are no match for the 1756-L61. Because of its sturdy build and capacity to withstand situations with substantial mechanical movements, it continues to function consistently under vibrations ranging from 10-500 Hz. This controller is great for both dry and wet environments because it works well in a wide range of relative humidity, from 5% to 95%.
The 1756-L61 can function across a wide range of temperatures, demonstrating its temperature resilience. Because of this feature, the product will work reliably in a variety of industrial environments with frequent temperature changes.
Applications
Many different types of industrial applications have made heavy use of the 1756-L61. It is perfect for complicated automation jobs in processing plants, manufacturing, and other industrial settings due to its capacity to manage a large number of I/O points. Applications needing accurate control and quick reaction, like those in the automotive, pharmaceutical, and food and beverage processing industries, are well-suited to the controllers powerful processing capabilities and sturdy architecture.
Despite being retired, the 1756-L61 is still integral to numerous current automation systems, attesting to its enduring influence and dependability. A key component in developing programmable controllers, its versatility, robustness, and accuracy have left an indelible mark on industrial automation.
Frequently Asked Questions:
In the 1756-L61, what kinds of nonvolatile memory are available?
Nonvolatile memory options supported: 128MB to 64MB CompactFlash. These offer reliable storage for critical data in a variety of capacities.
At what rate of tasks and programs per task is the 1756-L61 capable of handling?
The controller manages 32 jobs, each supporting up to 100 programs, ensuring efficient multitasking and program execution within defined task boundaries.
Can more than one 1756-L61 controller be installed in the same chassis?
Absolutely, the chassis facilitates independent operation of multiple 1756-L61 controllers, enabling robust and scalable control system configurations within a single unit.
Product Specification Table
| Attributes | Specification |
|---|---|
| Product Type | ControlLogix 2 MB Memory Controller |
| Lifecycle Status | Discontinued as of June 1, 2017 |
| Communication Interface | ControlLogix series |
| Software Compatibility | Compatible with the ControlLogix software suite |
| Ambient Temperature Range | 0 to 60 °C |
| Control Method | Programmable Logic Control |
| Scan Time | 0.08ms |
| Mounting Type | Rack-mounted |
| Scan Time | 0.08 ms |
| Weight | 0.32 kg |
All products (new, refurbished, and repairs) are covered by the Industrial Automation Company's 2 Year Warranty. Manufacturer's Warranty does not apply.
TECHNICAL SPECIFICATIONS
The Allen-Bradley 1756-L61 ControlLogix controller module is suited for usage in most medium-scale applications with the required I/O capacity. Additional modules, such as communication modules, specialist and intelligent modules, and encompass partner modules, may be fitted to improve the module’s functioning.
It has 478 Kb of available Input/Output memory and 2 MB of user memory. A 1784-CF128 CompactFlash memory card may be used to provide 128 MB of additional non-volatile storage capacity as an option. It is a chassis-based controller that may be installed in any open slot on the ControlLogix chassis 1756. This controller is compatible with the following chassis: 1756-A17, 1756-A4, 1756-A10, 1756-A13, and 1756-A7.
It features an open-style enclosure and can support as many as 250 controller connections. Additionally, it includes an integrated RS-232 serial communication port. The DF1 full/half-duplex protocols, DH-485, DF1 radio modem, and ASCII, are all supported by the RS-232 serial port.
The 1756-L61 controller module has 32 controller tasks, each with 100 programs. It supports several communication channels, including ControlNet, Data Highway Plus (DH+), EtherNet/IP, DeviceNet, SynchLink, and external device and process networks.
The 1756-L61 controller module consumes 14 mA @ 24V dc and 1200 mA @ 5V dc. Power dissipation is 3.5 Watts, while thermal dissipation is 11.9 BTU per hour. It also features a constant isolation voltage of 30V that has been tested for 60 seconds at 720V dc.
Its operational temperature range is 0 to 60 °C, and its maximum exterior air temperature tolerance is 60 °C. Its storage temperature range is -40 to 85 °C. While the non-operating shock is 50 G, the operational shock is 30 G. The vibration frequency is 2G between 10 and 500 Hz, and the relative humidity ranges from 5% to 95% (noncondensing).
The implementation of standalone and distributed I/O applications is supported by this controller. The network connections may differ depending on the communication module utilized. Additionally, it provides redundancy, which is generally needed in important systems to increase system availability.
Along with analog input possibilities, including encoder input, LDT input, and SSI input, this controller also features an integrated motion system through the embedded SERCOS (serial real-time communication system) interface. This module may implement motion across an Ethernet/IP network if used in conjunction with an Ethernet communication module.
Relay Ladder Logic (RLL), Structured Text (ST), Function Block Diagram (FBD), and Sequential Function Chart (SFC) are among the programming languages that the controller supports.
An RS-232 communication cable is necessary to communicate with the module. The user software and data are stored in the memory of this module using a battery. The battery versions 1756-BA1, 1756-BATM, and 1756-BATA are suitable for series A controllers, while the 1756-BA2 battery is suitable for series B controllers.
| Manufacturer | Industrial Automation |
| Brand | Allen-Bradley |
| Part Number/Catalog No. | 1756-L61 |
| Series | ControlLogix |
| Module Type | Processor Module |
| Fixed Memory | 2, 4, or 8 MB |
| 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 |
| Weight | 0.71 pounds (0.32 kilograms) |
| Vibration | 10-500 Hertz |
| UPC | 10612598300706 |
| Relative Humidity | 5-95 percent |
| Battery | 1756-BA1, 1756-BATM or 1756-BATA |
| UNSPSC | 32151705 |
| Product Lifecycle Status* | Discontinued/Obsolete |
| Programming Software | Redundancy |
| Full Support | Programming Languages |
*The Allen Bradley 1756-L61 has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1756-L61 units instead of migration.
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