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      In Stock
      Processor Unit

      1747-L20A/C

      Spare Part Number

      PN1747-L20A

      Product Information:

      Enhanced SLC 500 Fixed Hardware

      Style Programmable Logic Controller (PLC).

      This controller has an embedded

      capacitor-backed RAM with a memory

      size of 1K instruction capacity

      • One-year warranty
      • Global shipping
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      Technical specifications for

      1747-L20A/C

      0 TECHNICAL PARAMETERS
      • Manufacturer:
        Allen-Bradley
      • Product Category:
        PLC Systems
      • Spare Part Number:
        1747-L20A
      • Estimated shipping dimensions:
        15.2 cm x 17.8 cm x 17.8 cm
      • Weight:
        0.2 kg
      • Tariff Code:
        8537101190
      • Country of origin:
        USA
      • Place of shipment:
        Xiamen, Fujian, China
      • Controller memory:
        1K instruction capacity
      • Typical scan time:
        8 miliseconds / 1K
      • Bit execution:
        4 microseconds
      • Power supply Inrush rating:
        30 Amperes
      • Power Supply hold-up time:
        20 - 70 ms
      • Inputs:
        (12) 120 V AC
      • Outputs:
        8 AC/DC Relay
      • Line Power:
        120-240 Volts AC
      • Series:
        Allen-Bradley SLC 500
      • Stock Availability:
        30
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      BUYER INFORMATION

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      • 03

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      Alternative Names

      1747L20A 1747 L20A

      Manuals

      1747-L20A/C.pdf
      PRODUCT & ORDER FAQS

      Questions buyers ask about 1747-L20A/C

      • What is the architectural classification and design intent of the 1747-L20A/C controller within the Allen-Bradley SLC 500 portfolio?

        The 1747-L20A/C is a fixed-I/O PLC controller in the Allen-Bradley SLC 500 series that integrates a CPU, power supply, and embedded I/O in a compact enclosure. It is engineered for small-scale automation applications where a modular chassis is not required, providing a streamlined control solution with a fixed complement of inputs and outputs.

      • How does the 1747-L20A/C support discrete signal interfacing, and what are its embedded I/O characteristics?

        The 1747-L20A/C features a total of 20 I/O points, consisting of twelve discrete inputs and eight discrete outputs. The 1747-L20A variant uses 120 VAC rated inputs, while the 1747-L20C variant uses 24 VDC sink-type inputs, both paired with AC/DC relay outputs to actuate field devices without external I/O modules.

      • What memory architecture and processing capacity does the 1747-L20A/C employ for embedded control logic?

        The 1747-L20A/C incorporates 1 K instruction memory backed by capacitor-supported RAM, enabling execution of ladder logic routines for targeted control sequences. The embedded memory can also be backed up via optional EEPROM or UVPROM modules to preserve logic across power cycles.

      • What communication and network capabilities are provided by the 1747-L20A/C for system integration?

        The 1747-L20A/C uses an integrated DH-485 communication interface for connectivity to programming workstations, RSLogix 500, and other SLC 500 controllers. This protocol supports peer-to-peer messaging and facilitates interaction with HMIs and supervisory systems in legacy automation networks.
      All FAQ
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          Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.

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