AB 1747-L531
AB 1747-L531
AB 1747-L531
AB 1747-L531
AB 1747-L531
AB 1747-L531
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1747-L531

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Allen-Bradley 1747-L531 is an SLC 5/03 processor for modular SLC 500 control systems.
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Technical specifications for 1747-L531

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1747-L531
  • Product Family:
    SLC 500
  • Product Type:
    SLC 5/03 Processor
  • Stock:
    1
  • Processor:
    SLC 5/03
  • User Memory:
    8K words
  • Maximum Digital I/O:
    8,192 total; up to 4,096 inputs and 4,096 outputs
  • Chassis Capacity:
    Up to 3 chassis / 30 slots
  • Communications:
    Built-in DH-485 and RS-232 channels
  • Backplane Current at 5 V DC:
    500 mA
  • Backplane Current at 24 V DC:
    175 mA
  • Thermal Dissipation:
    1.75 W minimum and maximum
  • Typical Scan Time:
    1 ms/K
  • Bit Execution Time:
    0.44 µs for XIC instruction
  • Clock Accuracy:
    ±54 seconds/month at 25 °C; ±81 seconds/month at 60 °C
  • Program Scan Hold-up:
    20 ms to 3 s, dependent on power-supply loading
  • Operating Temperature:
    0 to 60 °C
  • Storage Temperature:
    -40 to 85 °C
  • Relative Humidity:
    5–95%, noncondensing
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Memory & I/O Communications System Planning Application
  • SLC 5/03 processor with 8K user-memory capacity
  • Supports a documented maximum of 8,192 digital I/O
  • DH-485 and RS-232 communication interfaces

1747-L531 is an Allen-Bradley SLC 5/03 Processor for SLC 500.

The L531 provides processor capability for a modular SLC 500 system. Program memory, communications, and the installed chassis arrangement must be preserved during replacement.

Confirm processor memory requirements, installed chassis and I/O, program and communication configuration, battery condition, and hardware series before replacement.

Availability, condition, price, and shipping time for 1747-L531 are confirmed during quotation.

Allen-Bradley 1747-L531 SLC 5/03 Processor Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Size the program and data requirements against the 8K processor capacity
  • Confirm the installed I/O count remains within the documented maximum
  • Retain the verified controller project before replacement
  • Match DH-485 node settings to the existing network
  • Retain RS-232 settings used by the connected equipment
  • Validate communication after restoring the processor project
  • Confirm the number of chassis and installed slots before system changes
  • Check power and addressing for every configured I/O chassis
  • Review backup-battery condition before returning the controller to service
  • Modular SLC 500 machine-control systems
  • DH-485 networked SLC 500 control systems
  • Serially connected SLC 5/03 control applications
Description
1747-L531 is an Allen-Bradley SLC 5/03 Processor for the SLC 500 platform.

The processor provides modular SLC 500 control with 8K user memory, DH-485 and RS-232 communications, and capacity for a documented multi-chassis I/O system.

Confirm processor memory requirements, installed chassis and I/O, program and communication configuration, battery condition, and hardware series before replacement.
Revisions

Revision Part #

Also known as

1747-L531 Ser A
1747-L531/A, Series A, Rev A
1747-L531 Ser B
1747-L531/B, Series B, Rev B
1747-L531 Ser C
1747-L531/C, Series C, Rev C
1747-L531 Ser D
1747-L531/D, Series D, Rev D
1747-L531 Ser E
1747-L531/E, Series E, Rev E
Alternative Names
1747-L531 1747 L531 1747L531 Allen-Bradley 1747-L531 Rockwell Automation 1747-L531 SLC 500 1747-L531
Technical notes
1747-L531 is an SLC 5/03 processor with 8K memory and DH-485/RS-232 interfaces. Preserve the controller project, chassis layout, and communications before replacement.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Which SLC 5/03 processor should replace Allen-Bradley 1747-L531 when DH-485 must remain?
Match the 8K SLC 5/03 role, processor Series, OS level, channel 1 DH-485 function, channel 0 protocol, and installed chassis before selecting a replacement.
Can Allen-Bradley 1747-L531 be substituted with another SLC processor without project review?
No. Processor capabilities, communications, memory, I/O addressing, and program compatibility must be checked first.
Why can a restored Allen-Bradley 1747-L531 project still show I/O faults?
The program can be correct while chassis addressing, rack power, module position, communication settings, or field wiring differs from the original system.
How should the Allen-Bradley 1747-L531 backup battery be handled?
Follow the official battery procedure and check its condition while preserving the processor program and clock data as applicable.
What should be checked before connecting Allen-Bradley 1747-L531 to an existing DH-485 network?
Verify node assignment, network media, terminating arrangement, connected equipment, and the communication configuration retained from the original processor.
Can Allen-Bradley 1747-L531 operate in a multi-chassis system?
Yes, within the documented SLC 500 chassis and slot capacity; confirm the complete installed I/O architecture before commissioning.
What memory-backup records should be preserved before replacing Allen-Bradley 1747-L531?
Save the application and data files, record the processor OS and Series, verify the memory module or battery arrangement, and test program recovery before returning the machine to service.