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NOTE:
The circuit breaker may bounce back to the off position if you move the breaker too
quickly.
8. Observe the status LEDs on the PDM faceplate. If the PDM is correctly installed and functioning
normally, the LEDs light green steadily.
9. On each of the DC PSMs, move the switch to the on (|) position.
Powering On the DC-Powered (-48 V) MX2008 Router
To power on a DC-powered MX2008 router:
1. Verify that an external management device is connected to one of the Routing Engine ports on the
Routing and Control Board (RCB) (AUX, CONSOLE, or MGMT).
2. Turn on power to the external management device.
3. Verify that the PDMs are fully inserted in the chassis.
4. Verify that the source power cables are connected to the appropriate terminal on the PDMs: the positive
(+) source cable to the return terminal labeled (RTN) and the negative (–) source cable to the input
terminal labeled (–48V).
5. Switch on the dedicated customer-site circuit breakers to provide power to the DC power cables.
Follow your site's procedures.
6. Check that the input labeled (–48V) LEDs are lit green steadily, indicating that the PDMs are installed
and functioning normally.
NOTE:
Nine input LEDs indicate proper voltage level and polarity of input feeds.
7. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
one of the ESD points on the chassis.
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