Product Description
The Allen-Bradley 1791-16AC is a complete Discrete I/O block designed for Remote I/O architectures. It features 16 discrete input channels (79-132VAC, 47-63 Hz, with input delays of 1.0ms On and 26ms Off) and 16 discrete output channels (20-132VAC, in two groups of 8, with output delays of 1.0ms On and 8.3ms/10.0ms Off at 60/50Hz). Functioning as a Remote I/O adapter, it connects to the controller via a Remote I/O scanner interface in a daisy-chain topology. It supports various input devices like switches and sensors, and output devices like lamps, relays, and solenoids. The module can be mounted horizontally or vertically, with a maximum power dissipation of 22.76W and thermal dissipation of 77.6 BTU/Hr. Isolation voltage ratings are 500VAC (Power Supply to RIO), 1250VAC (I/O group to I/O group), and 1250VAC (I/O group to Logic). Output current ratings vary based on mounting orientation: vertical mounting allows for 300mA at 60C and 600mA at 30C, while horizontal mounting allows for 150mA at 60C and 300mA at 30C; ensure connected devices are within these current limits.
Is Your Device Showing These Signs?
The Allen Bradley 1791-16AC I/O block commonly experiences failures related to corroded or damaged terminal blocks, resulting in intermittent or complete loss of signal integrity. Troubleshooting includes inspecting wiring connections for proper termination and addressing issues such as loose wiring or insulation displacement. Internal component degradation, specifically electrolytic capacitor failure within the power supply circuitry, causes operational instability. Replacement of the affected components or complete unit replacement restores functionality. Communication errors on the DeviceNet network stem from faulty transceivers or corrupted firmware, necessitating firmware upgrades or hardware replacement.
Technical specifications
The Allen-Bradley 1791-16AC is a Remote I/O discrete I/O block with 16 AC input channels and 16 AC output channels. It connects to a controller via a Remote I/O scanner interface in a daisy-chain configuration, supporting various input and output devices. It can be mounted horizontally or vertically, with specific power and thermal dissipation ratings. It also has defined isolation voltage ratings and output current limitations that vary based on mounting orientation, requiring careful consideration of connected device current requirements.
Our Repair Process for the
1791-16AC
Our repair process for the Allen Bradley 1791-16AC I/O block begins with a thorough inspection of wiring connections, addressing any loose wiring or insulation displacement to ensure proper termination. We then examine the terminal blocks for corrosion or damage, rectifying any issues to restore signal integrity. Internal component degradation, particularly electrolytic capacitor failure within the power supply circuitry, is addressed through component replacement. In cases of communication errors on the DeviceNet network, we perform firmware upgrades or replace faulty transceivers. Functionality is restored through replacement of affected components or complete unit replacement.
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.
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