Hitachi HDS728080PLAT20 Specifications - Page 63
DC power requirements
UPC - 829686000094
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Table 43: Limits of temperature and humidity Relative Humidity (%) 100 90 80 70 60 50 40 30 20 10 0 -4 5 N on -op era tin g 3 1 'C /9 0 % 3 6 'C /9 5 % W e tB u ib = 3 5 .0 'C W e tB u ib = 2 9 .4 'C O p e ra tin g 5 5 'C /1 5 % 6 5 'C /1 4 % -3 5 -2 5 -1 5 -5 5 15 25 35 45 55 65 T em p era tu re ('C ) Note: Storage temperature range is 0° to 65°. 7.2.2 Corrosion test The drive shows no sign of corrosion inside and outside of the hard disk assembly and is functional after being subjected to seven days at 50°C with 90% relative humidity. 7.3 DC power requirements The following voltage specifications apply at the power connector of the drive. Damage to the drive electronics may result if the power supply cable is connected or disconnected while power is being applied to the drive (no hot plug/unplug is allowed). Connections to the drive should be made in a low voltage, isolated secondary circuit (SELV). There is no special power on/off sequencing required. 7.3.1 Input voltage Table 44: Input voltage Input voltage supply2 During run and spin up Absolute max spike voltage1 Supply rise time +5 V 5 V ± 5% -0.3 to 7 V +12 V 12 V + 10% -8% -0.3 to 15 V 1To avoid damage to the drive electronics, power supply voltage spikes must not exceed specifications. 0 to 5 sec 0 to 5 sec 2 +12V should be applied within 60 seconds after +5V is applied to the drive. Deskstar 7K80 Hard Disk Drive Specification 59