Monitor the Enhanced PDU (HTML Interface)

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Using the metering unit's HTML interface, you can monitor how much power, energy, and current the equipment attached to the PDU uses, as well as the voltage level powering the equipment. The reported voltage for 3ph PDUs is L-N for HV PDUs and L-G for LV PDUs. The reported voltage for 1ph PDUs is L-N for HV PDUs and L-L for LV PDUs. You can see how the current and voltage readings relate to the threshold parameters you set in Set Threshold Parameter Values (Enhanced PDU).

Access the PDU metering unit from a system on the network.
See Access a Metering Unit on the Network (Enhanced PDU). After accessing the PDU, the Metering Overview page displays.

View the Metering Overview page.

The following figure shows an example Metering Overview page for a 24kVA PDU, which has two inputs with three phases each. See Understanding the Relationship Between Inputs and Outlet Groups for a description of PDU inputs.

image:Figure showing the Current Measurement web page.

The following figure displays the details of the current measurement of an example single PDU input.

image:Figure showing an example PDU current measurement.

No.	Description
1	PDU input number
2	Phase number
3	State
4	Graph displaying the amps of current being used per phase
5	Number of amps of current being used per phase
6	Voltage level applied per phase The reported voltage for 3ph PDUs is L-N for HV PDUs and L-G for LV PDUs. The reported voltage for 1ph PDUs is L-N for HV PDUs and L-L for LV PDUs.
7	Amount of active power being used per phase
8	Amount of apparent power being used per phase
9	Energy level being used per phase

The black vertical bar indicates the current used by the attached equipment. The color behind the line is determined by the threshold parameter values. If you set voltage threshold parameter values, the background of the voltage color indicates the state of the voltage powering the equipment. For more information on threshold limits, see Set Threshold Parameter Values (Enhanced PDU).

Note - The Enhanced PDU supports both, 10/100 Full Duplex and 10/100 Half Duplex as well as auto-negotiation as defined in IEEE802.3u. If the switch port supports auto-negotiation the Enhanced PDU will configure itself to the fastest speed supported by the switch. If a specific mode of operation is needed the switch port needs to be configured to the specific mode of operation.

Color	Value	Description
Blue	Measured current is below Info threshold.	Attached equipment is using less current than expected.
Green	Measured current is between the Info and Warning thresholds.	Attached equipment is using the expected amount of current.
Yellow	Measured current is above the Warning threshold, but below the Alarm threshold.	Attached equipment is using more current than expected.
Red	Measured current is above the Alarm threshold.	Attached equipment is using a critical amount of current and requires immediate attention.
Flashing bar with red text	Measured current is above the Out of Balance threshold. Also, a blinking red “Out of Balance” message displays above the input graph.	The equipment attached to one phase is using more current than the other phases on the input. The PDU and attached equipment require immediate attention.

Caution - If the PDU is out of balance, the PDU and the attached equipment might heat up and cause serious damage to the equipment, PDU, and the rack. Power off the equipment and the PDU immediately.

If you set voltage thresholds parameter values, the background of the voltage color indicates the state of the voltage powering the equipment. See the following table for a description of these colors.

Color	Value	Description
Green	Measured Voltage is above Warning threshold.	Attached equipment is operating with an expected voltage level.
Yellow	Measured Voltage is between Warning and Alarm threshold.	Attached equipment is operating at an allowable voltage level.
Red	Measured Voltage is below Alarm threshold.	Attached equipment might not operate as expected.

Caution - If the PDU input voltage is below the Alarm level, the attached equipment (and PDU) might be damaged. Power off the equipment and PDU immediately.