Connect Dc Power To An Dc-Powered Acx5096 Router - Juniper ACX5096 Quick Start Manual

6. If the AC power source outlet has a power router, set it to the on (|) position.
7. Verify that the AC LEDs are lit green and on steadily.

Connect DC Power to an DC-Powered ACX5096 Router

To connect power to an DC-powered router:
1. Attach the grounding strap to your bare wrist and to a site ESD point.
2. Verify that the DC power cables are correctly labeled before making connections to the power supply.
In a typical power distribution scheme where the return is connected to chassis ground at the battery
plant, you can use a multimeter to verify the resistance of the –48V and RTN DC cables to chassis
ground:
The cable with very low resistance (indicating a closed circuit) to chassis ground is positive (+) and is
installed on the V+ (return) DC power input terminal.
The cable with very high resistance (indicating an open circuit) to chassis ground is negative (–) and
is installed on the V– (input) DC power input terminal.
3. Ensure that the input circuit breaker is open so that the voltage across the DC power source cable
leads is 0 V and that the cable leads do not become active while you are connecting DC power.
The V+ terminals are referred to as +RTN, and V– terminals are referred to as –48 V.
4. Ensure that the power supplies are fully inserted in the chassis.
5. Remove the terminal block cover. The terminal block cover is a piece of clear plastic that snaps into
place over the terminal block.
6. Remove the screws on the terminals by using the screwdriver. Save the screws.
7. Connect each power supply to the power source. Secure power source cables to the power supplies
by screwing the ring lugs attached to the cables to the appropriate terminals by using the screw from
the terminals.
The DC power supply has four terminals labeled V+, V+, V–, and V– for connecting DC power source
cables labeled positive (+) and negative (–). The V+ terminals are shunted internally together, as are
the V– terminals. The same polarity terminal can be wired together from the same source to provide
an additional current path in a higher power chassis. Do not connect the terminals to different sources.
For example, connect –48 V from DC source feed A to the input terminals of one power supply and
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