Allen Bradley 1747-KY1 SLC Processor Replacement Key
Allen Bradley 1747-KY1 SLC Processor Replacement Key
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Brand:Allen Bradley PLC Item No.:1747-KY1 Product Origin:USA Product Dimensions:45 × 12 × 30 mm Product Weight:0.1 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Allen Bradley 1747-KY1 SLC Processor Replacement Key is a maintenance accessory intended for compatible Allen Bradley SLC 500 programmable logic controllers. It provides a replacement for the physical key used to operate the processor's mode selector.
On supported SLC processors, the key-operated selector provides a way to manage controller operating states. These states determine whether the processor executes its application program, remains in a programming mode, or allows remote mode control where supported. This function is important during commissioning, troubleshooting, and routine maintenance.
Unlike PLC processor modules or programming accessories, the 1747-KY1 does not perform control logic execution or data communication. Its role is limited to the physical operation of the compatible processor selector mechanism.
For industrial maintenance teams and facilities operating legacy SLC 500 systems, keeping a suitable replacement key available can help prevent unnecessary service interruptions caused by a missing or damaged key. Before purchasing, verify compatibility with the installed processor and inspect the selector mechanism to ensure that it is functioning correctly.
Technical Specifications
Parameter
Specification
Brand
Allen Bradley
Model
1747-KY1
Product Type
SLC Processor Replacement Key
Product Family
SLC 500
Accessory Type
Processor Key
Main Function
Operating-Mode Selector Access
Application
PLC Maintenance and Replacement
Dimensions
45 × 12 × 30 mm
Weight
0.1 kg / 0.22 lb
Recommended Related Models
The following Allen Bradley SLC 500 processor models and accessories are relevant to PLC maintenance. Verify the key-switch compatibility before selecting a replacement accessory.
Model
Product Description
1747-L511
SLC 5/01 Processor
1747-L524
SLC 5/02 Processor
1747-L531
SLC 5/03 Processor
1747-L541
SLC 5/04 Processor
1747-L551
SLC 5/05 Processor
Popular Related Models
Other Allen Bradley SLC 500 components and accessories commonly used in maintenance and system support include:
1747-BA – SLC 500 Lithium Battery Assembly.
1747-M11 – SLC 500 Memory Module.
1747-CP3 – RS-232 Communication Cable.
1747-UIC – USB to DH-485 Interface Converter.
1747-C13 – SLC 500 Communication Cable.
Note: The 1747-KY1 is a physical replacement accessory. Confirm the exact processor compatibility and selector mechanism before ordering. Availability may vary because the SLC 500 platform is a legacy product family.
Applications
The Allen Bradley 1747-KY1 SLC Processor Replacement Key is a small maintenance accessory designed for compatible Allen Bradley SLC 500 programmable logic controller systems. It is associated with the processor's key-operated mode selection mechanism, which allows authorized personnel to select the controller's operating mode.
In industrial automation environments, the processor key is useful for maintenance, commissioning, and operational management where access to the controller's mode selector is required.
Typical applications include:
PLC maintenance: Replace a missing or damaged processor key on compatible SLC controllers.
Machine commissioning: Support authorized access to processor operating-mode selection during system setup.
Industrial control panels: Maintain the availability of the processor's key-operated selector.
Equipment servicing: Provide a spare key for facilities maintaining legacy SLC 500 systems.
Automation system operation: Support controlled access to processor mode selection by authorized technicians.
Advantages
Dedicated SLC Processor Accessory
The 1747-KY1 is designed as a replacement key accessory for compatible SLC processor hardware. It helps maintain the intended operation of the processor's key-operated selector.
Supports Operating-Mode Selection
The processor key allows authorized personnel to operate the selector mechanism and choose the supported controller mode, according to the specific processor model.
Convenient Spare-Part Availability
Keeping a replacement key available can reduce maintenance delays if the original key is lost or damaged.
Compact and Easy to Store
Its small size makes it convenient to keep with PLC spare parts, maintenance tools, and control-panel accessories.
Useful for Legacy SLC 500 Systems
Many industrial installations continue to use SLC 500 controllers. Replacement accessories such as the 1747-KY1 can help support routine maintenance of these established automation systems.
Technical FAQs
Q1: What is the Allen Bradley 1747-KY1 used for?
The 1747-KY1 is an SLC processor replacement key used with compatible Allen Bradley SLC 500 processor key-switch mechanisms.
Q2: What does the processor key switch control?
The key switch selects the processor's operating mode. Depending on the controller model, available modes can include RUN, PROG, and REM, which determine how the processor executes logic and accepts programming or remote mode commands.
Q3: Is the 1747-KY1 a PLC programming tool?
No. It is a physical replacement key, not a programming cable, software package, or communication interface. PLC programming is performed using compatible programming software and communication hardware.
Q4: Can the key be used to change the processor from PROG to RUN mode?
The key can be used to operate the processor's selector when the key and processor are compatible. The selected mode determines whether the controller executes its application program or remains in a programming-related state.
Q5: Does the 1747-KY1 fit every SLC 500 processor?
Compatibility should be confirmed against the processor model and manufacturer's documentation. Do not assume that every controller in the SLC 500 family uses an identical key mechanism.
Q6: What is the difference between RUN and REM modes?
RUN mode places the processor in normal program execution. REM mode allows the operating state to be controlled remotely through supported programming or communication functions, depending on the processor configuration.
Q7: Can the key be removed after selecting an operating mode?
Key removal behavior depends on the processor's selector design and selected position. Follow the controller's operating instructions rather than forcing the key or selector.
Q8: What should be done if the replacement key does not turn?
Check that the key is the correct type for the processor and that it is fully inserted. Inspect the selector for damage or obstruction. Never apply excessive force, as this may damage the key or switch mechanism.
Q9: Does replacing the processor key affect the PLC program?
No. Replacing a physical key does not normally alter the controller's user program, firmware, or memory contents. However, changing the selector position can change the processor's operating state.
Q10: What information should be checked before ordering a 1747-KY1?
Confirm the complete catalog number, the SLC processor model, the key-switch design, and the condition of the existing selector. This helps avoid ordering an incompatible replacement accessory.
