Figure 54: Installing An Ac Power Supply - Juniper MX240 Hardware Manual

MX240 Ethernet Services Router Hardware Guide
Installing an AC Power Supply
To install an AC power supply (see Figure 54 on page 114):
1.
2.
3.
4.
5.
6.
7.

Figure 54: Installing an AC Power Supply

Removing a DC Power Supply
WARNING: Before performing the following procedure, ensure that power is removed
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.
114
Replacing Power System Components
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 "Preventing Electrostatic Discharge Damage" on page 130.
Move the AC switch next to the appliance inlet on the power supply to the off
position ( ).
O
Using both hands, slide the power supply straight into the chassis until the power
supply is fully seated in the chassis slot. The power supply faceplate should be
flush with any adjacent power supply faceplate or blank installed in the power
supply slot.
Tighten both captive screws at the bottom of the power supply.
Attach the power cord to the power supply.
Attach the power cord to the AC power source, and switch on the dedicated
facility circuit breaker for the power supply. Follow the ESD and connection
instructions for your site.
Move the AC switch next to the appliance inlet on the power supply to the on
position ( ) and observe the status LEDs on the power supply faceplate. If the
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power supply is correctly installed and functioning normally, the
LEDs light steadily, and the
DC OK
LED is not lit.
PS FAIL
AC OK and