Vertiv Liebert DCD, Руководство пользователя

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5.3.1 Standard Version
NOTE: For this option, please refer N of Digit 19- DCDactive Upgrades given in Table 3.2 on page 9 .
A standard, Vertiv™ Liebert® DCD35/50 Active is equipped with a single wide-range voltage input (110/230V). There are no
temperature sensors and no TFT display. A green operation LED and a red fault LED are installed for status monitoring.
All versions have a Modbus TCP/IP connection. This connection can be used to read measured values and the status of the
machine and to change settings. The interface is specified in
MODBUS TCP/IP Specification on page 61 .
All settings can be read and written using PC software via a USB port on the central control board.
5.3.2 Redundant A/B Power Supply
NOTE: For this option, please refer A, B, C, D of Digit 19- DCDactive Upgrades given in Table 3.2 on page 9 .
With the optional A/B power supply (110 V or 230 V), the unit receives two separate mains supplies (Supply A and Supply B).
As soon as mains voltage is applied to input A, the unit is supplied from this input. If the mains voltage at input A is removed,
the unit switches internally to input B and is then supplied from input B. For 110 V and 230 V mains voltages, the correct unit
variant must be ordered. (See
Vertiv™ Liebert® DCD and Vertiv™ Liebert® DCDactive Unit Code Table on page 9 ).
5.3.3 Monitoring Package with Display and Sensors
NOTE: For this option, please refer A, C, T of Digit 19- DCDactive Upgrades given in Table 3.2 on page 9 .
With the optional TFT display and sensors, the temperatures in the server cabinet (rack) and in the fan module (exhaust air
temperature after the heat exchanger in the door) can be measured and displayed. The door contact switch can also be used
to monitor the opening and closing of the rack doors. A leak sensor can be connected to detect leaks or excessive
condensate. With the color TFT display, the set and actual speeds of the fans can be read off and the status of the unit can be
monitored. Many other functions are also possible. See Table 5.1 below .
Function Description
Selection of the reference variable for
speed control
Choice between differential pressure control and server temperature control.
Selection of the pressure level for
differential pressure control
Selection between three set differential pressures:
• Slight Negative Pressure
• Neutral
• Slight Positive Pressure.
Setting the pressure levels
In the password-protected Set-up menu:
• Setting of the three pressure levels between -15 Pa and +15 Pa.
Setting of the server temperature
control
• Setting of the start temperature (minimum speed) and end temperature (maximum speed).
• Linear speed control between the start and end temperature.
• Selection between the average and maximum value of the sensors in the server cabinet.
Setting of the speed limits
• Setting of the lower and upper speed limit between 17% and 100%.
• Fixed speed possible independent of the control if the upper speed limit is set lower than the
lower speed.
Setting of the temperature alarms
Setting of the lower and upper temperature alarm threshold independently for:
• Server Temperature
• Exhaust Air Temperature
Table 5.1 Different Possible Functions of Monitoring Package
5 General Information
18
Vertiv™ Liebert® DCDactive Fan Module User Manual