Product Description
The Allen-Bradley 849A-ZOB25 is a pneumatic on-delay timer that delays the activation of its electrical contacts after the coil is energized. The delay time is adjustable via a knob that controls airflow into a pneumatic bellows, which mechanically actuates the contacts. The relay's contact block is replaceable and auxiliary contacts can be added. Its normally open contacts return to their initial state via a spring mechanism when the coil signal changes. This timer is commonly used in hazardous industrial environments.
Is Your Device Showing These Signs?
The Allen Bradley 849A-ZOB25 solid-state overload relay commonly experiences issues such as failure to trip under overload conditions, often traced to a defective current transformer or internal component degradation. Troubleshooting includes verifying proper wiring connections, confirming correct current transformer ratios, and inspecting for physical damage. Calibration drift leads to inaccurate overload protection, requiring recalibration or replacement. Communication errors over the DeviceNet network stem from faulty network cables, incorrect node addressing, or a malfunctioning communication module. Resolving these issues ensures proper motor protection and prevents equipment damage.
Technical specifications
The Allen-Bradley 849A-ZOB25 is a pneumatic on-delay timer with adjustable delay via a knob-controlled bellows. It actuates electrical contacts after a set delay when the coil is energized, and contacts return via a spring when the coil signal changes. It features replaceable contact blocks and is suitable for hazardous industrial environments.
Our Repair Process for the
849A-ZOB25
Our repair process for the Allen Bradley 849A-ZOB25 solid-state overload relay begins with a thorough inspection of wiring connections and a verification of the current transformer ratios. Technicians then conduct a detailed examination for any physical damage to the unit. If the relay fails to trip under overload conditions, the current transformer and internal components undergo rigorous testing to identify defects. Calibration is checked and adjusted to eliminate drift and ensure accurate overload protection. For communication errors over the DeviceNet network, network cables are tested, node addressing is verified, and the communication module is inspected for malfunctions. Defective components are replaced, and the entire unit is retested to confirm proper functionality and adherence to specifications before it is returned.
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.