NOTE: Do not overheat the tubing.
Figure 29: How to Install Heat-Shrink Tubing
4. Ensure that the input circuit breaker is open so that the voltage across the DC power source cable
leads is 0 V and that the cable leads do not become acve while you are connecng DC power.
NOTE: The V+ terminals are referred to as +RTN, and V– terminals are referred to as –48 V
in
DC Power Wiring Sequence Warning
and
DC Power Electrical Safety Guidelines
.
5. Ensure that the power supplies are fully inserted in the chassis.
6. Remove the terminal block cover. The terminal block cover is a piece of clear plasc that snaps into
place over the terminal block (see Figure 30 on page 85).
7. Remove the screws on the terminals using the screwdriver. Save the screws.
WARNING: Ensure that the power cables do not block access to device
components or drape where people can trip on them.
83
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