CAUTION:
You must ensure that power connections maintain the proper polarity.
The power source cables might be labeled
(+)
and
(–)
to indicate their polarity. There
is no standard color coding for DC power cables. The color coding used by the external
DC power source at your site determines the color coding for the leads on the power
cables that attach to the terminal studs on each power supply.
1.
Ensure that the voltage across the DC power source cable leads is 0 V and that
there is no chance that the cable leads might become active during installation.
2.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and
connect the strap to one of the ESD points on the chassis. For more information
about ESD, see the
IBM Ethernet Appliance J34S Hardware Guide
.
3.
For each power supply:
a.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
b.
Attach the positive (+) DC source power cable lug to the
RTN
(return)
terminal.
Figure 15: Connect DC Power Cables
c.
Secure the cable lug to the terminal on the power supply, first with the square
washer, then with the screw. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in.
(2.8 Nm) of torque.
18
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Step 5: Connect the Ground and Power Cables
IBM Ethernet Appliance J34S Getting Started Guide
