Juniper QFX10002 Hardware Manual page 121

• Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD)
damage (see "Prevention of Electrostatic Discharge Damage" on page
• Ensure that you have connected the switch chassis to earth ground. See
to Ground" on page 105.
• Install the power supply in the chassis. For instructions, follow the instructions in
Supply in a QFX10002" on page
The battery returns of the DC power supply must be connected as an isolated DC return (DC-I).
• Ensure that you have the following parts and tools available:
• ESD grounding strap
• Slotted (–) screwdriver, 1/4-in., with a torque range between 6 lb-in (0.68 Nm) to 7 lb-in (0.79
Nm)
CAUTION: You must use an appropriate torque-controlled tool to tighten the
screws on the DC power cable connector. Do not overtighten the screws. Applying
excessive torque damages the terminal block and the wiring tray. The absolute
maximum torque that may be applied to this screw is 10 lb-in (1.13 Nm).
• Power cables appropriate for your geographical location available to connect DC power to the
QFX10002. There are two types of DC power cables–a straight DC power cable (CBL-JNP-PWR-
DSUB) and a right-angle DC power cable (CBL-JNP-PWR-DSUB2) or (CBL-JNP-PWR-DSUB3).
See "QFX10002 DC Power Specifications" on page
CAUTION: Do not mix AC and DC power supplies in the same chassis.
NOTE: Each power supply must be connected to a dedicated power source outlet.
The power supply in a QFX10002 is a hot-removable and hot-insertable field-replaceable unit (FRU).
You can remove and replace it without powering off the switch or disrupting switch functions. You do,
however, need to remove power from the power supply before attempting to remove the unit.
WARNING: DC-powered QFX10002 models are intended for installation only in a
restricted access location.
128.
57.
189).
"Connecting the QFX10002
"Installing a Power
112