Product Overview
The Siemens 6ES7490-0AA00-0AA0 is a dedicated power connector spare part designed for the SIMATIC S7-400 series. Specifically intended for the PS405 power supply units rated at 4A, 10A, and 20A, this accessory ensures uninterrupted power delivery to your PLC system. As a genuine replacement component, it maintains the high reliability expected from Siemens industrial automation modules.
This power plug is classified as a Product Type Designation Power Connector and is an integral accessory for S7-400 systems. Weighing approximately 30 grams, it is a compact yet critical spare that helps prevent downtime caused by connector wear or failure.
Installation & Setup Guidance
Replacing the power connector on a PS405 module is straightforward. Ensure the system is powered down and disconnected from mains before proceeding. Remove the old connector by gently pulling it from the module socket. Insert the new Siemens 6ES7490-0AA00-0AA0 firmly until it clicks into place. Verify the connection by performing a continuity check with a multimeter before restoring power. Always use genuine spare parts to avoid compatibility issues and maintain safety standards.
Maintenance & Reliability
Regular inspection of power connectors is essential for sustained PLC operation. Look for signs of physical damage, corrosion, or loose connections. The Siemens 6ES7490-0AA00-0AA0 is built to endure industrial environments, but periodic checks—especially after power surges or heavy vibration—are recommended. Replacing worn connectors proactively minimizes unexpected downtime and extends the life of your S7-400 system. Given its low weight and compact size, it is easy to stock as a preventive spare.
Compatibility & Integration
This power connector is designed exclusively for Siemens S7-400 racks powered by the PS405 power supply modules (4A, 10A, 20A variants). It integrates seamlessly with the backplane of the S7-400 chassis, ensuring proper electrical contact and mechanical fit. No additional adapters or cables are required for installation. Always verify your existing PS405 model number to confirm compatibility with the Siemens 6ES7490-0AA00-0AA0 before ordering.
Selection Guide & Purchasing Advice
When ordering the Siemens 6ES7490-0AA00-0AA0, confirm that it is intended for the PS405 power supply in your S7-400 system. This spare part is a standard replacement and does not require any special tools for installation. For guaranteed authenticity and reliable supply, consider sourcing from trusted industrial automation suppliers such as PLC Source PRO (available through ubest101.myshopify.com). Always check the quantity needed—keeping one spare per system is a cost-effective strategy to reduce potential downtime.