Product Description
The Allen-Bradley/Rockwell Automation 1774-SR is a remote I/O half scanner module for the SLC 500 controller system (Series B/Bulletin 1774). As part of the SLC 500 system, which includes modular processors, chassis, and power supplies compliant with EMC and low voltage directives (EN 50081-2, 50082-2, EN 61131-2) and carrying a CE mark, the 1774-SR allows a processor to communicate with remote I/O chassis, operator interfaces, and other control devices. SLC 500 processors support 1K to 64K words of memory and up to 3940 I/O points, accommodating digital, analog, and intelligent I/O modules. The 1774-SR module, with a maximum current rating of 0.9 Amps at 5 VDC and a maximum wattage of 4.5 Watts, supports block transfers up to 64K words of data and a maximum of 4 full logical racks (512 I/O points). It is designed for any slot in the local SLC chassis except Slot 0.
Is Your Device Showing These Signs?
The Allen Bradley 1774-SR PLC module commonly exhibits issues related to communication failures, often stemming from corrupted firmware or faulty serial communication ports. Resolve communication problems by reflashing the firmware, verifying proper baud rate settings, and inspecting the RS-232 or RS-422 cabling for damage. Address I/O errors by checking the backplane connection for corrosion and ensuring proper termination resistors are installed. Memory corruption is a potential problem, so clear the memory and reload the program. Power supply fluctuations can cause erratic behavior; verify the power supply voltage is within specified tolerances.
Technical specifications
The Allen-Bradley 1774-SR is a remote I/O half scanner module for the SLC 500 controller system, enabling communication between the SLC 500 processor and remote I/O devices. It supports block transfers up to 64K words, a maximum of 512 I/O points, and is designed for any slot in the SLC chassis except Slot 0. The SLC 500 system itself is compliant with EMC and low voltage directives and supports a wide range of memory and I/O capabilities.
Our Repair Process for the
1774-SR
Our repair process for the Allen Bradley 1774-SR PLC module begins with addressing communication failures by reflashing the firmware, verifying the baud rate settings, and inspecting the RS-232 or RS-422 cabling for damage. I/O errors are resolved by checking the backplane connection for corrosion and ensuring proper termination resistors are installed. Memory corruption is handled by clearing the memory and reloading the program. Power supply fluctuations are mitigated by verifying the power supply voltage is within specified tolerances.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.
Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.