Product Description
The Allen-Bradley 1791D-0B16PX is a compact, cost-effective 16-point sourcing output expansion module from the CompactBlock I/O family, designed for space-constrained or distributed I/O applications. It integrates a remote adapter, power supply, and I/O circuits, simplifying installation and reducing wiring costs. Features include rotary node address switches for easy commissioning, output short-circuit protection, wide-range 10-30V DC power supply compatibility, autobaud detection to prevent communication errors, and grouped outputs with I/O status indicators. It requires 500V AC isolation in specific configurations and offers an IEC IP20 enclosure. DIN rail mounting is necessary for proper operation, and ribbon cable length is important when connecting to a base unit, which can be mounted horizontally or vertically.
Is Your Device Showing These Signs?
The Allen Bradley 1791D-0B16PX I/O block commonly experiences communication failures due to corrupted backplanes or faulty DeviceNet connectors; address this by inspecting and replacing damaged components. Resolve intermittent sensor readings or actuator malfunctions by recalibrating the analog input/output modules and verifying field wiring terminations. Overcome power supply issues by testing the voltage regulator and replacing capacitors exhibiting degradation. Correct network configuration errors by confirming the DeviceNet MAC ID and baud rate settings match the PLC configuration. Mitigate issues stemming from environmental factors by ensuring proper grounding and shielding to reduce electromagnetic interference (EMI).
Technical specifications
The Allen-Bradley 1791D-0B16PX is a compact, 16-point sourcing output expansion module for space-constrained or distributed I/O. It simplifies installation with integrated components and features like rotary address switches, short-circuit protection, wide-range power supply, autobaud detection, and grouped outputs with status indicators. It requires 500V AC isolation in certain setups, has an IP20 enclosure, and needs DIN rail mounting. Ribbon cable length matters when connecting to the base unit.
Our Repair Process for the
1791D-0B16PX
Our repair process for the Allen Bradley 1791D-0B16PX I/O block begins with a thorough inspection of the backplane and DeviceNet connectors; damaged components are replaced immediately. Analog input/output modules are recalibrated, and field wiring terminations are verified to resolve sensor and actuator issues. The voltage regulator is tested, and degraded capacitors are replaced to address power supply problems. DeviceNet MAC ID and baud rate settings are confirmed against the PLC configuration to correct network errors. Proper grounding and shielding are ensured to reduce electromagnetic interference (EMI) and mitigate environmental factors.
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.
Buying Options
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY