Which two parameters are commonly monitored on intelligent rack PDUs?

Intelligent or "smart" rack PDUs are equipped with monitoring capabilities that provide granular data on power consumption. The most common and fundamental parameters monitored are the voltage (V) and current (amperage, A) for each individual outlet or for groups of outlets (branch circuits). This data is crucial for capacity planning, load balancing, and identifying potential power issues before they cause an outage. Other metrics like power (kW) and energy (kWh) are often calculated from these primary measurements.

B. CPU temperature is an internal server metric monitored by the server's baseboard management controller (BMC), not the PDU.
C. Generator frequency is monitored at the power source (generator, ATS) as part of the upstream power infrastructure.
D. Network latency is a data communication metric measured by network monitoring tools, unrelated to the PDU's power distribution function.

1. Eaton. (2019). Rack PDU Handbook. Page 6, "Metered-outlet PDUs," states these devices provide data on "voltage, current, power and energy consumption per individual outlet."

2. Schneider Electric. (2012). White Paper 115: The Different Types of Rack Power Distribution Units. Rev 2. Page 3, describes "Metered-by-Outlet Rack PDUs" as providing "current consumption per individual outlet."

3. Vertiv. (n.d.). Geist™ Rack PDU - Monitored. Official product documentation specifies monitoring of "Voltage, Current, Power, and Power Factor at the outlet level."