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Table 2. AC TO DC Converter Requirements
Input Voltage Range
The operating range shall be from 90 to 132 and 195 to 240 VAC sinusoidal for all
models specified.
Input Frequency Range
Input power frequency range shall be from 47.5 to 63Hz over the specified input
voltage range.
Power Consumption
Power consumption for the monitor shall be less than 49W over the specified voltage
and frequency ranges. In power off mode the power consumption will be less than
1W (at 90VAC~240VAC).
Line Fuse
The AC input shall be fused and become electrically open as a result on an unsafe
current level. The fuse may not be user replaceable.
Initial Cold Start
The power supply shall start and function properly when under full load, with worst
case conditions of input voltage, input frequency, operating temperature, and cold
backlight lamps.
Inrush Current
The inrush current must be limited to 42A when operated at 120VAC, and 80A when
operated at 220VAC. In - rush current is measured at an ambient temperature of 25°
C, with the unit temperature stabilized in the power - off
Hot Start Cycle
The power supply shall not be damaged when switched ON for one second and OFF
for one second for seven consecutive times after operating for one hour at full load,
25°C, and nominal input line voltage.
Under Voltage
The power supply shall contain protection circuitry such that the application of an
input voltage below the minimum specified in this table shall not cause damage to
the power supply unit nor cause failure of the input
Line Transient
The power supply shall operate within IEC 801-4 (±1KV) and IEC 801 -5 (±2KV) for
the domestic U.S. Version. The UPS power supply shall operate and comply with CE
mark.
3.11. Display Communications Channel
The monitor assembly shall provide a display communications channel that conforms to VESA DDC2B hardware
requirements. This configuration shall contain the 256-byte EDID file as specified by VESA E-EDID Standard. The
monitor contains a separate EEProm for each video input to store EDID information. Once the EDID is programmed
there is a write protection that is enabled so that the EEPROM cannot be overwritten.