Where to plug in the power to Huawei s core switch

Huawei core switches are powered by connecting AC or DC power modules to the designated power input terminals, ensuring correct polarity and following ESD safety precautions.

Power Module Types and Connection Points

Huawei core switches, such as the S12700 series, support pluggable AC or DC power modules. Each module has a dedicated power input socket or terminal on the switch chassis. Some switches allow multiple power modules for redundancy, and it is recommended to connect them to different power sources to improve reliability .

• AC Power Modules: Connect to standard AC circuits using the provided power cables. Each module should be connected to an independent circuit breaker with a current rating equal to or greater than the maximum allowed by the module .
• DC Power Modules: Use DC power cables with correct polarity. For example, the -48 V return (black) cable connects to the RTN (+) terminal, and the -48 V power (blue) cable connects to the NEG (-) terminal. Quick-connect DC modules allow the cable plug to be inserted directly into the module socket, ensuring positive and negative poles match .

Safety Precautions

• ESD Protection: Wear an ESD wrist strap or gloves and ensure proper grounding before handling power connections .
• Power Off: Turn off the external power supply and the switch's power module switch (if present) before connecting cables .
• Check Polarity: Always verify the polarity of DC connections to prevent damage to the switch .

Power-On Procedure

1. Connect the power cables to the switch or power module according to the type (AC or DC) and polarity .
2. Install any protective covers and secure screws on DC terminals if applicable .
3. Turn on the external power supply system connected to the switch .
4. Switch on the power module or the switch itself if it has a power switch .
5. Verify that the switch and power module indicators show normal operation .

Redundancy Considerations

For switches with multiple power modules, you can configure N+N or 1+1 redundancy by connecting modules to separate power sources. This ensures continuous operation even if one power source fails . By following these steps, you can safely and correctly power a Huawei core switch while maintaining system reliability and protecting the hardware from electrical or electrostatic damage.