Operation Manual – PoEH3C S7500 Series Ethernet Switches Chapter 2 PoE PSU Supervision Configuration2-2To do… Use the command… RemarksEnter the system view system-view —Set the overvoltagealarm threshold of ACinput (upper threshold)for the PoE PSUspoe-powerinput-thresh upperstringRequired.For 220 VAC input, thethreshold is recommended tobe 264.0 V.For 110 VAC input, thethreshold is recommended tobe 132.0 V.Set the undervoltagealarm threshold of ACinput (lower threshold)for the PoE PSUspoe-powerinput-thresh lowerstringRequiredFor 220 VAC input, thethreshold is recommended tobe 181.0 V.For 110 VAC input, thethreshold is recommended tobe 90.0 V.Note:z You can set the thresholds to any appropriate values in the range, but make surethe lower threshold is less than the upper threshold.z For 220 VAC input, it is recommended to set the upper threshold to 264.0 V and thelower threshold to 181.0 V.z For 110 VAC input, you are recommended to set the upper threshold to 132.0 V andthe lower threshold to 90.0 V.2.2.2 AC Input Alarm Threshold Configuration ExampleI. Network requirementsz Set the overvoltage alarm threshold of AC input for PoE PSUs to 264.0 V.z Set the undervoltage alarm threshold of AC input for PoE PSUs to 181.0 V.II. Configuration procedure# Enter system view. system-view# Set the overvoltage alarm threshold of AC input for PoE PSUs to 264.0 V.[H3C] poe-power input-thresh upper 264.0# Set the undervoltage alarm threshold of AC input for PoE PSUs to 181.0 V.[H3C] poe-power input-thresh lower 181.0# Display the AC input state of the PoE PSUs.
