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December 08, 2025
Category Connection: Allen Bradley
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Tags:
#Allen Bradley 2198-D012-ERS3 #Allen Bradley 1784-KTCS #Dual Axis Module
Brief: Observe the step-by-step operation and see practical examples of usage for the Allen Bradley 1771-ASB Remote I/O Adapter Module. This video demonstrates how this critical interface enables efficient communication between remote I/O modules and programmable controllers in industrial automation systems. You'll learn about its enhanced diagnostic indicators for easier troubleshooting and see how it handles data transmission across various cable distances and baud rates.
Related Product Features:
  • Transmits data up to 10,000 cable-feet at 57.6K baud and up to 2,500 cable-feet at 230.4K baud for faster backplane scanning.
  • Receives and sends data from the I/O scanner in serial form while reading and writing data from I/O modules in parallel form.
  • Supports any mix of I/O modules with 4, 6, 8, 16 or 32 points for flexible system configuration.
  • Offers three methods of I/O addressing: 1/2-slot, 1-slot and 2-slot to accommodate various setup requirements.
  • Checks I/O configuration on power-up to verify proper I/O module placement in the chassis.
  • Scans all chassis slots or all but the last four slots, allowing improved scan time and I/O image space savings.
  • Can emulate series B adapters for compatibility with 1771-S4A and -S4B scanners in existing systems.
  • Features enhanced diagnostic indicators that simplify troubleshooting and maintenance procedures.
FAQs:
  • What happens to inputs and outputs when an adapter communication failure occurs?
    On a communication failure, inputs in this rack will appear in the processor input image table in the last state they were reported to be in before the failure. Outputs will either remain in their last state or be turned off, depending on the I/O chassis backplane switch setting for output last state.
  • Is there a way to monitor remote rack status and take action if there is a rack fault or communication failure?
    Yes, processor rack fault bits can be monitored. Communication failure can be detected by monitoring the program's block transfer error bit. A diagnostic step array and timer can be programmed to monitor the status of changing digital inputs, allowing appropriate action through a programmed fault routine.
  • How do I add a 1771-ASB adapter module to my ControlLogix remote I/O network?
    Simply add the adapter under the 1756-DHRIO scanner in the Logix5550 Controller Organizer I/O configuration tree. With the scanner, adapter and chassis switches set correctly, download the program to the Logix5550 processor and switch to Run mode to commence communication.
  • I replaced my series B adapter with a series E adapter and now my block transfers are timing out. What's wrong?
    Certain scanner modules require series B emulation which includes a delay to provide the scanner sufficient time to service all communication ports. If using a 1772-SD2, 1775-S4, 1775-S4A, 1775-S5, 1775-SR5 or 1775-SR scanner, set the link response for unrestricted or series B emulation (switch S2, position 5 on).
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