Product Description
The Allen-Bradley 1791-IOBB is a compact Block I/O module featuring 10 sinking inputs and 6 sourcing outputs. This remote I/O device includes a power supply, programmable controller interface, and signal conditioning circuitry, making it compatible with Allen-Bradley's PLC-2, PLC-3, PLC-5, and SLC 500 controllers. It offers easy wiring with removable I/O and remote I/O connectors, plus DIP switches for configuring I/O rack number, starting I/O group, transmission rate, last state, and DH-485 termination. LED indicators simplify monitoring and troubleshooting by displaying communication status, power status, and individual I/O states. A DH-485 data port facilitates communication with the SLC controller, requiring a termination resistor on the last block in a series. It operates between 0 and 55 degrees Celsius, stores between -40 and 85 degrees Celsius, and tolerates 5-95% non-condensing humidity, with a power dissipation of 13.05W (max) and 8.92W (typical).
Is Your Device Showing These Signs?
The Allen Bradley 1791-IOBB I/O block commonly experiences issues such as communication failures stemming from corrupted backplane connections or faulty DeviceNet adapters. Field wiring errors, specifically short circuits or open circuits in the input/output wiring, cause module faults and disrupt process control. Power supply fluctuations or inadequate grounding lead to erratic behavior and component degradation. Firmware corruption during upgrades necessitates reflashing the module to restore functionality. Physical damage from environmental factors, such as excessive vibration or temperature, compromises the integrity of the I/O block and requires repair or replacement.
Technical specifications
The Allen-Bradley 1791-IOBB is a compact Block I/O module with 10 sinking inputs and 6 sourcing outputs, designed for use with Allen-Bradley PLC controllers. It features a built-in power supply, controller interface, and signal conditioning. It offers easy wiring, DIP switches for configuration, LED indicators for status monitoring, and DH-485 communication. It also has specified operating and storage temperature ranges, humidity tolerance, and power dissipation characteristics.
Our Repair Process for the
1791-IOBB
Our repair process for the Allen Bradley 1791-IOBB I/O block begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the failure, whether it be communication failures due to corrupted backplane connections or faulty DeviceNet adapters, field wiring errors causing module faults, power supply fluctuations leading to erratic behavior, firmware corruption requiring reflashing, or physical damage compromising the unit's integrity; this evaluation includes thorough testing of all input and output channels, power supply circuits, and communication interfaces. Once the fault is identified, we proceed with component-level repairs, replacing damaged or defective parts with original or equivalent components, ensuring proper soldering techniques and adherence to industry standards. For firmware corruption, the module is reflashed with the correct firmware version. Following repairs, the I/O block undergoes rigorous functional testing under simulated operating conditions to verify complete restoration of functionality and adherence to performance specifications. Finally, the repaired unit is cleaned, inspected for any remaining issues, and prepared for return, accompanied by a detailed repair report outlining the work performed and the test results.
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.