Installation manual

38 | Installing DC Power Entry Modules
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Figure 8-3. Grounding
7 Remove the outer nuts and washers from each of the remaining studs.
8 Connect the -48 VDC and Return cables from each PEM to the remote sources.
a Verify that the remote source is in the OFF position.
b Locate the appropriate studs on the PEM front panel.
• The two top studs (furthest from the GND) are the return (+48V DC) connection. The cable attached to these
studs is typically red.
• The two bottom studs (closest to GND) are the -48 V DC connection. The cable attached to these studs is
typically black.
NOTE: Cables must be terminated only with a UL-listed 2-hole lug to accommodate 1/4-inch studs with
3/4-inch spacing.
c Apply a coat of anti-oxidant paste to the connector studs, if required.
d Replace the washers and nuts on the studs.
e Route the terminated cables out toward the rack rail.
f Secure the nuts with a nut driver or torque wrench (not to exceed 4 ft/lbs).
Step Task (continued)
9 Replace the safety cover and tighten the captive screw.
Note that the safety cover can be rotated to accommodate system configurations.
10 Turn the Over-Current Protector to the ON position ( Figure 8-1 ).
11 Turn the remote source (the circuit breaker panel) to the ON position.
Step Task (continued)
Ground
Connector
Return (+48V)
Connectors
-48V Connectors