Key Features & Technical Specifications
- Input voltage: 120V or 230V AC/DC, with line frequency 50/60 Hz (47–63 Hz permissible).
- Output: 5V DC at 10A for backplane bus, no base load required.
- Secondary 24V DC output at 1A, idling-proof.
- Mains buffering: 20 ms stored energy time, meets NAMUR recommendation.
- Short-circuit protection included.
- Power loss: typ. 20 W; active power input typ. 95 W.
- Potential separation primary/secondary, overvoltage category II.
- FM approval: Ta 0°C to 70°C T4; BIS approval.
These specifications ensure reliable operation in demanding industrial environments, with built-in protection against voltage sags and transients.
Installation & Setup
Mount the unit in a standard S7-400 rack using two slots. Connect the primary supply via the 3x 1.5 mm² terminals (solid or stranded wire with end sleeve, external diameter 3–9 mm). Ensure proper grounding with the protective conductor to meet equipment protection class I. After wiring, verify output voltages before loading the backplane.
Maintenance & Reliability
Regularly inspect the power supply for dust accumulation and ensure adequate ventilation. Check input and output connections for tightness. The unit’s short-circuit protection and overvoltage category II rating reduce the risk of damage from electrical faults. Following Siemens’ maintenance guidelines will extend service life and maintain performance.
Solving Power Integrity in S7-400 Racks
The 6ES7407-0KA02-0AA0 from Siemens addresses this by providing a regulated 5V DC output at up to 10A, ensuring your S7-400 rack receives clean, consistent power. Its wide input range accepts both AC and DC supplies, making it a versatile choice for global installations.
Compatibility & Integration
It provides both 5V and 24V backplane voltages, supporting a wide range of I/O modules and CPUs. Its universal input makes it suitable for installations worldwide.
Troubleshooting Common Issues
If the backplane voltage drops, check the input supply for stability and verify that the total current draw does not exceed 10A. A blown fuse or tripped circuit breaker often indicates an overload or short circuit. Ensure the mains frequency is within 47–63 Hz to avoid erratic operation. For persistent issues, consult the official Siemens manual.
Availability
The 6ES7407-0KA02-0AA0 is available from AutoDCSTech. Contact us for current stock and delivery options.
Availability & Condition at AutoDCSTech
| Part Number | 6ES7407-0KA02-0AA0 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | Germany |
