Installing An Mx10003 Dc Power Supply - Juniper MX10003 Hardware Manual

Figure 43: Removing a DC Power Supply

Installing an MX10003 DC Power Supply

WARNING:
from the DC circuit. To ensure that all power is off, locate the circuit breaker on the
panel board that services the DC circuit, switch the circuit breaker to the off position,
and tape the switch handle of the circuit breaker in the off position.
To install a DC power supply (see
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 ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on
the chassis.
3. Using both hands, slide the DC power supply straight into the chassis until the power supply is fully
seated in the chassis slot. The power supply faceplate must alligned with any adjacent power supply
faceplate or blank installed in the power supply slot.
4. Remove the nuts from the terminals.
5. Secure each power cable lug to the terminal with the nut (see
5 lb-in. (0.6 Nm) and 6 lb-in. (0.7 Nm) of torque to the nut. Do not overtighten the nut (use a socket
nut driver).
a. Secure the positive (+) DC source power cable lug to the RTN (return) terminal.
b. Secure the negative (–) DC source power cable lug to the –48V (input) terminal.
Before performing DC power procedures, ensure that power is removed
Figure 44 on page 133):
Figure 45 on page 134). Apply between
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