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1747-L551

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1747-L551 is an Allen-Bradley SLC 5/05 processor with 16K words of total memory, 10BASE-T Ethernet, and RS-232 communication. It integrates modular SLC 500 control with Ethernet-connected industrial automation systems.
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Technical specifications for 1747-L551

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1747-L551
  • Product Family:
    SLC 500
  • Product Type:
    SLC 5/05 Controller
  • Stock:
    1
  • User Memory:
    16K words total
  • I/O Capacity:
    4096 inputs and 4096 outputs maximum
  • Communication:
    Ethernet and RS-232
  • Program Scan:
    0.9 ms/K typical
  • I/O Scan:
    0.225 ms typical
  • Local Chassis:
    3 maximum
  • Local Module Slots:
    30 maximum
  • Backplane Current:
    1.0 A at 5V DC; 200 mA at 24V DC
  • Tariff Code:
    8537101190
  • Country of origin:
    Singapore
  • 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 Performance Ethernet Diagnostics Environment

Features:

  • Provides 16K words of total memory for the SLC 5/05 control application and data.
  • Supports up to 4096 inputs and 4096 outputs in a modular SLC 500 system.
  • Combines Ethernet and RS-232 communication for programming and data exchange.

1747-L551 is the 16K-word SLC 5/05 processor configuration for a modular 1746 SLC 500 system. It provides Ethernet connectivity for control applications that require access to an industrial network.

The processor scans the stored ladder program, updates the chassis I/O image, and coordinates installed modules through the SLC backplane. Its typical program scan is 0.9 ms/K, and its typical I/O scan is 0.225 ms.

Confirm slot-0 placement, memory and I/O requirements, chassis power capacity, compatible 1746 modules, and matching Ethernet and serial-channel settings before installation.

Availability: OEM-discontinued; contact Apter Power for quotation, documentation, and sourcing support.

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.

  • 1747-L541 provides 16K words of total memory: 12K words for program or data and 4K words reserved for data.
  • The processor supports up to 4096 inputs and 4096 outputs, with a typical program scan time of 0.9 ms/K and a typical I/O scan time of 0.225 ms.
  • It supports up to three local chassis and 30 local module slots, with a backplane load of 1.0 A at 5V DC and 200 mA at 24V DC.
  • Channel 1 provides an Ethernet interface for programming and data exchange with compatible industrial network devices.
  • SLC 5/05 Series A and B processors use fixed 10 Mbps Ethernet operation, while supported Series C firmware adds configurable speed and duplex options.
  • For Series C operation, the processor and its Ethernet link partner must use compatible auto-negotiation or matching forced speed and duplex settings.
  • Front-panel indicators report processor RUN and FLT states, forced-I/O status, battery condition, Ethernet activity, and serial-channel status.
  • RSLogix 500 can display processor status and fault information when 1747-L551 does not enter or remain in RUN mode.
  • Ethernet and serial-channel diagnostic information can be used to distinguish processor faults from network or communication-configuration problems.
  • The specified operating temperature range is 0 to 60 °C (32 to 140 °F).
  • The specified operating relative humidity range is 5 to 95 percent without condensation.
  • The modular SLC 500 hardware specification lists vibration acceleration of 2.5 g from 57 to 2,000 Hz.
Description
1747-L551 is an Allen-Bradley SLC 5/05 processor with 16K words of total memory. Its memory allocation includes 12K words for program or data and 4K words reserved for data, supporting modular SLC 500 logic execution and chassis I/O coordination.

The processor supports up to 4096 inputs and 4096 outputs, three local chassis, and 30 module slots. Typical program scan time is 0.9 ms/K, typical I/O scan time is 0.225 ms, and backplane current is 1.0 A at 5V DC plus 200 mA at 24V DC.

Channel 1 provides 10BASE-T Ethernet communication for networked programming and data exchange. Channel 0 provides RS-232 communication and can also be configured for DH-485, giving the processor both Ethernet and serial connectivity.

Confirm the Ethernet addressing, serial-channel configuration, memory requirement, chassis power, compatible 1746 modules, and stored application program before installation or replacement.
Alternative Names
1747 L551 1747L551 AB 1747-L551 Allen-Bradley 1747-L551 Allen Bradley 1747 L551 SLC 5/05 16K Ethernet Controller
Technical notes
1747-L551 is an Allen-Bradley SLC 5/05 processor with 16K words of total memory, Ethernet, and RS-232. It integrates modular SLC 500 control with Ethernet-connected automation systems.
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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.
What memory capacity is available in 1747-L551?
1747-L551 provides 16K words total, including 12K words for program or data and 4K words for data only.
Which Ethernet interface does 1747-L551 use?
1747-L551 provides a 10BASE-T Ethernet port together with an RS-232 communication port.
What processing performance does 1747-L551 provide?
Rockwell Automation lists a typical program scan time of 0.9 ms/K and support for 107 instructions.
Can 1747-L551 control local and remote SLC 500 I/O?
1747-L551 supports modular local I/O and can address remote I/O when an appropriate scanner module is installed.
What is the official lifecycle status of 1747-L551?
Rockwell Automation discontinued 1747-L551 on December 31, 2021 and lists an Engineering Replacement category.
Where can I obtain 1747-L551 documentation or a quotation?
Rockwell Automation publication 1747-IN009 covers installation. Contact Apter Power for documentation, sourcing, and quotation support.