4.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
5.
Secure the power cable lugs to the terminal studs on the power supply, first with
the split washer, then with the nut. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in.
(2.8 Nm) of torque. Do not overtighten the nut. (Use a 7/16-in. [11 mm]
torque-controlled driver or socket wrench.)
a.
Attach the positive (+) DC source power cable lug to the
RTN
(return)
terminal.
b.
Attach the negative (–) DC source power cable lug to the
–48V
(input)
terminal.
CAUTION:
Ensure that each power cable lug seats flush against the surface of the
terminal block as you are tightening the nuts. Ensure that each nut is properly
threaded onto the terminal stud. The nut should be able to spin freely with your
fingers when it is first placed onto the terminal stud. Applying installation torque to
the nut when improperly threaded may result in damage to the terminal stud.
CAUTION:
The maximum torque rating of the terminal studs on the DC power supply
is 36 lb-in. (4.0 Nm). The terminal studs may be damaged if excessive torque is
applied. Use only a torque-controlled driver or socket wrench to tighten nuts on the
DC power supply terminal studs.
6.
Replace the clear plastic cover over the terminal studs on the faceplate.
7.
Repeat Step 3 through Step 6 for the remaining power supplies.
8.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and
connect the strap to an approved site ESD grounding point. See the instructions
for your site.
9.
Connect each DC power cable to the appropriate external DC power source.
NOTE:
For information about connecting to external DC power sources, see the
instructions for your site.
10.
Switch on the external circuit breakers to provide voltage to the DC power source
cable leads.
11.
Switch on the circuit breakers on each power supply to the
ON
position (
|
).
Observe the status LEDs on each power supply faceplate. If a DC power supply
is correctly installed and functioning normally, the
PWR OK
,
BRKR ON
, and
INPUT OK
LEDs light green steadily.
Step 5: Connect Ground and Power Cables
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19
Step 5: Connect Ground and Power Cables
