NetApp DS4246 User Manual

R
CABLE
DC resistance of the cable at a given length
R
SOURCE
DC resistance of the source
R
TOTAL
Combined DC resistance of the cable and DC source:
R
TOTAL
= R
SOURCE
+ R
CABLE
V = IR
Ohm's Law
V
OC
=V
SOURCE
+ V
LOAD
Kirchoff's Voltage Law
Example 1
This example uses the following given values:
Given
V
DROP
= 2V
Maximum voltage drop through input source and cable
V
MIN
= 40V
Minimum input voltage
I
MAX
= 8.6A
Maximum input current at 40V
V
OC
= 48V
Measured
V
LOAD
= 47.5V
Measured
R
TEST
= 10Ω
(300W)
DS4243, DS2246, DS4486, and DS4246 Installation and Service Guide 65
Recommended power line sizes

NetApp DS4246 Specifications

General

Data transfer rate	6 Gbit/s
Storage drive size	3.5 \
Storage drive interface	Serial Attached SCSI (SAS)
Storage drives installed	Yes
Installed storage drive type	HDD
Supported storage drive types	HDD & SSD
Total installed storage capacity	40.8 TB
Maximum supported storage capacity	- TB
Number of storage drives installed	24
Chassis type	Rack (4U)
Product color	Black
Device class	Large Enterprise Business
AC input voltage	100-240 V
AC input frequency	50 - 60 Hz
Number of power supply units	2
Operating altitude	0 - 3045 m
Non-operating altitude	-305 - 12192 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	10 - 40 °C
Storage relative humidity (H-H)	10 - 95 %
Operating relative humidity (H-H)	20 - 80 %

Weight and Dimensions

Depth	610 mm
Width	483 mm
Height	178 mm