Product Description
The Allen-Bradley 1746-A4 is a 4-slot expansion chassis for SLC 500 series modules, designed for panel mounting. It requires a separate power supply, which is screw-mounted to the left end panel. The right and center panels are secured with a latch. The chassis is mounted to the enclosure using four screws through its mounting tabs, potentially requiring paint removal for electrical grounding. It can be used as a standalone unit (connector plug on the left) or interconnected with up to two other chassis for a maximum of 30 I/O slots. Side-by-side connections use the 1746-C7 cable (6 inches), while vertical stacking uses the 1746-C9 (36 inches) or 1746-C16 (50 inches) cables. The 1746-A4 has a backplane current of 5.1V DC at 10A and 24V DC at 2.88A, weighs 0.75 kg (1.7 lbs), and measures 17.7 x 17.1 x 14.5 cm (7.1 x 6.8 x 5.8 inches). It operates between 0-60C (32-140F) with 5-95% non-condensing relative humidity.
Is Your Device Showing These Signs?
The Allen Bradley 1746-A4 chassis commonly experiences issues such as backplane corrosion leading to communication failures between modules. Power supply degradation results in intermittent operation and system crashes. Bent or damaged connector pins cause module recognition problems and I/O errors. Memory corruption within installed modules manifests as program faults and data loss. Environmental factors such as excessive heat or humidity accelerate component aging, leading to unpredictable system behavior and reduced operational lifespan.
Technical specifications
The Allen-Bradley 1746-A4 is a 4-slot expansion chassis for SLC 500 modules, designed for panel mounting and requiring a separate, screw-mounted power supply. It can function standalone or be interconnected with up to two other chassis for up to 30 I/O slots using specific cables for side-by-side or vertical stacking. It has defined backplane current specifications, operating temperature and humidity ranges, and physical dimensions/weight. Mounting involves screws through tabs, potentially requiring paint removal for grounding.
Our Repair Process for the
1746-A4
Our repair process for the Allen Bradley 1746-A4 chassis begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the malfunction, specifically addressing common issues such as backplane corrosion, power supply degradation, connector pin damage, and memory corruption. The backplane undergoes a thorough inspection and cleaning to eliminate corrosion; damaged connector pins are meticulously straightened or replaced to ensure proper module connectivity. The power supply is tested under load and rebuilt with new components as needed to guarantee stable voltage output. Each installed module is tested for memory integrity and reprogrammed or replaced to eliminate program faults and data loss. The chassis is then subjected to rigorous environmental testing to verify proper operation under various conditions, ensuring extended operational lifespan and reliable performance.
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.