Connect DC Power to the PA-7500 Series Firewall

1. Read the Product Safety Warnings.
2. Put the provided ESD wrist strap on your wrist ensuring that the metal contact is touching your skin. Then attach (snap) one end of the ground cable to the wrist strap and remove the alligator clip from the banana clip on the other end of the ESD grounding cable. Plug the banana clip end into one of the ESD ports located on the appliance before handling ESD sensitive hardware.
3. Ensure that your DC power feed is powered off.
4. Remove the four nuts from the ground studs located on the back of the appliance.

5. Crimp a 6-AWG wire to the provided grounding lug and connect the other end to your earth ground point.

   The crimp tool is not included with the appliance. It is recommended that you use a Panduit CT-3001/ST crimp tool for this procedure. Refer to the manufacturer’s specifications for more information.
6. Connect the two-post lug connector to the two-post ground studs on the appliance using the provided nuts and torque each nut to 50 in-lbs. Be careful not to strip the nuts and lug studs.
7. Prepare the DC power cable (not included) by crimping the bare wire ends of the cables using lugs (not included) designed for your DC power source. Each cable dongle has one red wire and one black wire. Connect the red wire to the DC negative (-48VDC) terminal of your DC power source. Connect the black wire to the DC positive (RTN) terminal of your DC power source. Do this for each of the power supplies you are installing, ensuring that each pair of power supplies is connected to its own power circuit breaker. This ensures power redundancy and allows for planned electrical circuit maintenance.
8. Connect the other ends of the cables to the front of the DC power supplies by pushing the connectors into each DC power supply until it is secure.

   The DC power supplies ship with the necessary 3m-long 2AWG cables (pictured below).

   When cabling the DC power supply to your power source, ensure that you route the cables in such a way that they do not put pressure on the plastic clips located at the front of the DC power supplies.

   When routing the cables to the other side of the chassis, it is recommended that you keep each cable within a bend radius of 3.1 inches (7.97 cm).
9. Install blanks into any unused power supply slots to help maintain chassis air flow. Slide the blank into the slot until the thumb tabs click into the locked position.

   To remove the blanks, press the thumb tabs towards each other and then pull the blank outwards.

10. After each DC cable is securely connected, turn on the power source and the appliance will power on.