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Allen Bradley 1774 PLCs and Modules 1774-LD2

1774-LD2

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The 1774-LD2 module is an arithmetic module by Allen-Bradley. The unit comes with a fixed power supply module and a processor that is packaged as a single unit.

Ships Tue, Jul 22.
In Stock
Ships from Raleigh, NC
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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with DO Supply's 2-year warranty.
Learn more

Technical specifications for 1774-LD2

BrandAllen-Bradley / Rockwell Automation
Series1774 PLCs and Modules
Part Number1774-LD2
DesignA single unit with single slot processor
Communication Internal bus
Diagnostics and troubleshooting Onboard diagnostics mechanism
Power supplyFixed power supply
Number of programming instructionsMore than 70
Instruction typesJMP, JSR, and MCR, among others
Timed interrupt routineYes
Product Lifecycle Status*Discontinued/Obsolete

* The Allen Bradley 1774-LD2 has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1774-LD2 units instead of migration.

Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

The 1774-LD2 arithmetic module by Allen-Bradley features processor input and output ports that are packaged together in a single unit. The unit comes with a processor whose core function is ensuring the control and supervision of all the module's operations. It is designed with an internal communication platform in the form of an internal bus that transmits information to the processor and the unit's memory. The 1774-LD2 module comes as a single slot processor module that is used for controlling the program execution as well as for the management of functionalities. To achieve an efficient arithmetic capability, the 1774-LD2 module comes with over 70 programming instructions, making the unit able to achieve more power. To ensure the efficient use of the microprocessor time, the 1774-LD2 module comes with high-speed program scanning. Therefore, the 1774-LD2 module processes only the parts of the control program that are currently needed. The different program control instructions include the JMP, JSR, and MCR instructions.

The 1774-LD2 module features a timed interrupt routine, allowing the users to react to any major faults. This is made possible through stopping the processor to avoid faults. The 1774-LD2 module features an on-board diagnostic mechanism. This ensures easy monitoring and simplified troubleshooting in the case of a fault. The 1774-LD2 module should not be inserted into the PLC-3 main processor chassis. To provide an effective execution, the unit features a processor module and it uses up to four AMD bit-slice microprocessors. The unit ensures high-speed program scanning and this means that it is able to achieve a quick determination of the current status. The unit is built to ensure high-speed I/O processing, with no backplane access needed. The memory configuration features an effective approach for handling a wide variety of applications.