Connecting Dc Power To An Ex9253 Switch And Powering On The Switch - Juniper EX9253 Hardware Manual

indicate that the power supply is functioning normally. Ignore error indicators that appear
during the first 60 seconds.
8. Connect an external management device to the port labeled CON on one of the Routing Engines.
9. Turn on power to the external management device.
10. Switch on the dedicated customer-site circuit breaker for the power supplies.
11. If the AC power source outlet has a power switch, set it to the on position.
12. Verify that the status LED on the power supply faceplate is on and steadily lit green.
13. On the external management device, monitor the startup process to verify that the switch has
booted properly.

Connecting DC Power to an EX9253 Switch and Powering on the Switch

Before you begin to connect DC power and power on the switch, ensure that you have the following
parts and tools available:
• Two DC power source cables (minimum 10 AWG (1.3 mm² ), minimum 60° C wire or as permitted by
local code)—not provided
• Two 16-14 AWG ring lugs sized for #6 screws (Panduit PN10-10R or equivalent)—provided
• A torque-controlled socket nut driver, with a maximum torque capacity of 6 lb-in. (0.68 Nm), for
tightening the screws on the terminals on each power supply—not provided
• A wire cutter
• An electrostatic discharge (ESD) grounding wrist strap—provided
• An external management device—not provided
WARNING: Ensure that you understand how to prevent ESD damage (see
Electrostatic Discharge Damage
Depending on the model, you can use either AC or DC power supplies. The power supplies are hot-
removable and hot-insertable field-replaceable units installed in the rear panel of the switch. You can
replace them without powering off the switch or disrupting switch functions.
CAUTION: Do not mix AC and DC power supplies in the same switch.
).
Prevention of
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