Power supply indicator on S series switches


The following describes power supply indicators on S series switches:

1. Indicators on the switch panel:
Off: No power module is detected, or the power module is working abnormally when no other power module is installed on the switch.
Steady green: The power supply is supplying power normally.
Steady red: The power supply is faulty. Possible causes are as follows:
- If two power modules are installed, a power module is available but its power switch is in the OFF position.
- The power module is not connected to the power source.
- The system power and PoE power are faulty.
Steady yellow: The power supply is abnormal.
- If a single power module is installed, the PoE power is abnormal.
- If two power modules are installed, the system power or PoE power is abnormal.
- If the switch is powered by a backup power module, the power module is faulty.
2. Indicators of power modules:
Off: No input current or output current is detected.
Steady green: The power input or output is normal.
Steady red: Input undervoltage, input overvoltage, output overvoltage, output current limiting, output short-circuit, overtemperature protection, or no power output
Steady red: An unrecoverable fault occurs on the power module.
Steady yellow: The power module stops supplying power, or overtemperature, input overvoltage, input undervoltage, or output overcurrent occurs.
Blinking yellow: Communication between the power module and the monitoring module (MPU or CMU) is interrupted.
Steady on: The input power of the power module is in the normal range.

Other related questions:
Whether power modules on S series switches are hot swappable
Power modules of S series switches are hot swappable. Install and remove power modules when the device is running normally and safely. 1:1 mentioned in the product documentation indicates power module backup, which means 1+1 backup. You can use Hardware Query Tool to query details.

PoE power supply priority on an S series switch with insufficient power
For an S series with insufficient power, if the PoE power supply priority is not set, the switch first provides power for a device connected to an interface with a smaller interface number.

AC and DC power supply on S series switches
You can check whether an S series switch supports AC or DC power supply based on the following guidelines: 1. Check the switch model. If the model contains AC, the switch supports AC power supply. If the model contains DC, the switch supports DC power supply. 2. Check the power module. Differentiate AC and DC switches based on the power module. Power modules are divided into non-PoE and PoE power modules. You can also use the Hardware Query Tool at Hardware Query Tool.

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