Juniper MX240 Hardware Manual page 260

MX240 5G Universal Routing Platform Hardware Guide
260
CAUTION: Do not leave a fiber-optic transceiver uncovered except when
you are inserting or removing cable. The safety cap keeps the port clean
and prevents accidental exposure to laser light.
CAUTION: Avoid bending a fiber-optic cable beyond its minimum bend
radius. An arc smaller than a few inches in diameter can damage the cable
and cause problems that are difficult to diagnose.
Immediately cover each optical transceiver and the end of each fiber-optic cable with
6.
a rubber safety cap.
Arrange the disconnected cables to prevent the cables from developing stress points.
7.
Simultaneously turn both of the ejector handles counterclockwise to unseat the DPC.
8.
Grasp the handles and slide the DPC straight out of the card cage halfway.
9.
Place one hand around the front of the DPC and the other hand under it to support it.
10.
Slide the DPC completely out of the chassis, and place it on the antistatic mat or in
the electrostatic bag.
CAUTION: The weight of the DPC is concentrated in the back end. Be
prepared to accept the full weight—up to 13.1 lb (5.9 kg)—as you slide the
DPC out of the chassis.
When the DPC is out of the chassis, do not hold it by the ejector handles,
bus bars, or edge connectors. They cannot support its weight.
Do not stack DPCs on top of one another after removal. Place each one
individually in an electrostatic bag or on its own antistatic mat on a flat,
stable surface.
If you are not reinstalling a DPC into the emptied DPC slot within a short time, install
11.
a blank DPC panel over the slot to maintain proper airflow in the DPC card cage.
CAUTION: After removing a DPC from the chassis, wait at least 30 seconds
before reinserting it, removing a DPC from a different slot, or inserting a
DPC into a different slot.
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