Juniper Networks M5 - Manual (Page 126)

Replace Power System Components
Figure 36: Remove a DC Power Supply
1321
Install a DC Power Supply
To install a DC power supply, follow this procedure (see Figure 37 and Figure 38):
1. Verify that there is no power flowing to the power supply from the external power
source, so that the voltage across the leads of the power cables is 0 V. Ensure that there
is no chance that the cable leads might become active during the procedure.
2. Verify that the power switch for the power supply (located on the power supply
faceplate) is in the OFF (O) position.
3. Verify that the grounding cable is attached to the chassis and properly connected to
an earth ground.
4. 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
“Prevent Electrostatic Discharge Damage” on page 134.
5. Grasp the handle on the power supply faceplate with one hand and place the other
hand under the supply to support it.
6. Align the rear of the supply with the slide guides inside the chassis and slide the supply
into the chassis until it contacts the midplane.
7. Tighten (but do not overtighten) the thumbscrews on the power supply faceplate. Turn
both thumbscrews simultaneously and at about the same rate (turning them alternately
or at very different rates can cause the power supply to become lodged in the slot,
making it difficult to turn the screws).
8. If necessary, strip a short section of the protective cladding from the end of each power
cable so that the metal core can come in direct contact with the quick-connect terminal.
106 M5 and M10 Internet Routers Hardware Guide