Vertiv™ NetSure™ Control Unit (NCU) User Manual
NOTE!
The systems calculates the capacity based on the nominal ratings under nominal operating conditions.
• High Load Level2: Sets the High Load Level 2 alarm point (Percentage of total rectifier capacity. When solar converters
and rectifiers are both in the system, high load level is based on the capacity of all valid rectifiers and valid solar converters
combined. A valid rectifier or solar converter is a unit that is communicating and can deliver power. Note, a solar converter is
not valid at night.)
NOTE!
The systems calculates the capacity based on the nominal ratings under nominal operating conditions.
• Relay Test: Sets the Relay Test feature to Automatic, Manual, or Disabled. Refer to “Using the Relay Test Feature” on page
46.
• Relay Test Time: Sets the Relay Test Time for the Automatic Relay Test feature.
• Main Ambient Temp Sensor: Sets the temperature sensor which displays the ambient temperature on the Web Interface's
Homepage. Note that this temperature sensor MUST be set as an ambient temperature sensor. Select "None", or the
temperature probe [System Temp1, System Temp2, System Temp3, IB2-1 Temp1, IB2-1 Temp2, IB2-2 Temp1, IB2-2 Temp2,
EIB-1 Temp1, EIB-1 Temp2, EIB-2 Temp1, EIB-2 Temp2, SMTemp1 Temp1, …, SMTemp1 Temp8, …, SMTemp8 Temp1, …,
SMTemp8 Temp8], SMDUE1 Temp1, …, SMDUE1 Temp10, SMDUE2 Temp1, …, SMDUE2 Temp10]. You can also select
Maximum or Average which takes the maximum or average reading of the temperature probes [any of System Temp1,
System Temp2, System Temp3, IB2-1 Temp1, IB2-1 Temp2 , IB2-2 Temp1, IB2-2 Temp2, EIB-1 Temp1, EIB-1 Temp2, EIB-2
Temp1, EIB-2 Temp2, SMTemp1 Temp1, …, SMTemp1 Temp8, …, SMTemp8 Temp1, …, SMTemp8 Temp8], SMDUE1 Temp1, …,
SMDUE1 Temp10, SMDUE2 Temp1, …, SMDUE2 Temp10] set as ambient temperature probes. When set, the following
parameters can also be set.
Main Ambient Temp High2: Sets the Main Ambient Temperature High 2 alarm point.
Main Ambient Temp High1: Sets the Main Ambient Temperature High 1 alarm point.
Main Ambient Temp Low: Sets the Main Ambient Temperature Low alarm point.
• Fail Safe Mode: When enabled, sets the relay designated as the "Critical Summary" alarm relay to operate in the "fail safe"
mode. In this mode, the relay is energized during normal operation and de-energized for an alarm condition.
• Rectifier Expansion:
- Inactive: Select this option if this is the only NCU controller in the power system.
- Primary: Select this option if the power system consists of multiple bays with multiple NCU controllers and this
controller is to be the primary controller. Note that only one (1) NCU controller can be set as the primary controller.
NOTE!
When primary is selected, the NCU will start auto configure. This process will take more than three (3) minutes.
- Secondary: Select this option if the power system consists of multiple bays with multiple NCU controllers and this
controller is to be a secondary controller.
ALERT! DO NOT set the controller to Secondary from the Web Interface. You will not be able to log into the controller after
it automatically reboots into secondary mode. Controllers to be designated as secondary controllers need to be set locally via
the local keypad and display.
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