1.
Make sure that the power on-off switches of
both
dc power supplies in the storage subsystem and
all
attached storage enclosures are in the off position.
2.
Connect a dc jumper cable to
each
dc power supply in the storage subsystem and to
all
attached
storage enclosures:
a.
Using the supplied strap, tie the dc power supply cable to the rail to provide strain relief for the
power cable.
b.
Connect the dc power cable to the power supply. See Figure 14 and Table 1 for the dc power
supply connector PIN positions.
Table 1. DC power supply connector - pin descriptions
Number
Function
DC power cable wire color
1
Pin 1: - 48 V dc
Brown
2
Pin 2: POS RTN
Blue
3
Pin 3: GND
Green/yellow
c.
Connect the - 48V wire (brown) of the dc power cable to an approved disconnect device (circuit
breaker) rated at 30 A. The disconnect device must be easily accessible from the back of the
DS3500 unit.
Attention:
v
The disconnect device (circuit breaker) must be rated at 30 A.
v
Make sure that only 10 AWG copper conductor wires are used for all of the wiring between the
DS3500 or EXP3500 dc power connectors and the dc power source.
d.
Complete the wiring from the disconnect device to the terminal marked -48V of the Reliably
grounded safety extra low voltage (SELV) dc power source. Connect the POS RTN wire (blue) and
the ground wire (green/yellow) of the dc power cable to the terminals marked POS RTN and
GND on the dc power source, as shown in Figure 15.
Figure 14. DC power connector - pin positions
Figure 15. DC wiring from DS3500 to disconnect device and dc power source
13
Summary of Contents for DS3500
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