Replacing an SRX5800 Services Gateway DC Power Supply Cable

To replace an SRX5800 Services Gateway DC power supply cable, perform the following procedures:

1. Disconnecting an SRX5800 Services Gateway DC Power Supply Cable
2. Connecting an SRX5800 Services Gateway DC Power Supply Cable

Disconnecting an SRX5800 Services Gateway DC Power Supply Cable

Warning: Before performing DC power procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position.

To disconnect a power cable for a DC power supply:

1. Switch off the dedicated customer site circuit breaker for the power supply being removed. Follow your site's procedures for ESD.
2. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process.
3. Verify that the INPUT OK LED on the power supply is not lit.
4. Remove the power cable from the external DC power source.
5. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
6. Move the DC circuit breaker on the power supply faceplate to the off (O) position.
7. Remove the clear plastic cover protecting the terminal studs on the faceplate.
8. Remove the nut and washer from the terminal studs. (Use a 7/16–in. nut driver or socket wrench.)
9. Remove the cable lug from the terminal studs.
10. Loosen the captive screw on the cable restraint on the lower edge of the power supply faceplate.
11. Carefully move the power cable out of the way.

Connecting an SRX5800 Services Gateway DC Power Supply Cable

Warning: Before performing DC power procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position.

To connect a power cable for a DC power supply:

1. Locate a replacement power cable that meets the specifications defined in DC Power Cable Specifications for the SRX5800 Services Gateway.
2. Verify that a licensed electrician has attached a cable lug to the replacement power cable.
3. Verify that the INPUT OK LED is off.
4. Secure the power cable lug to the terminal studs, first with the split washer, then with the nut. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut (see Figure 1).

   Figure 1: Connecting Power Cables to the DC Power Supply

   
5. Route the power cable through the cable restraint. Make sure that the cable does not touch or obstruct any services gateway components.
6. Tighten the cable restraint captive screw to hold the power cables in place.
7. Verify that the DC power cable is connected correctly, that it does not touch or block access to services gateway components, and that it does not drape where people could trip on it.
8. Replace the clear plastic cover over the terminal studs on the faceplate.
9. Attach the power cable to the DC power source.
10. Turn on the dedicated customer site circuit breaker to the power supply.
11. Verify that the INPUT OK LED on the power supply is lit steadily.
12. Move the DC circuit breaker on the power supply to the on (|) position and observe the status LEDs on the power supply faceplate. If the power supply is correctly installed and functioning normally, the PWR OK, BRKR ON, and INPUT OK LEDs light green steadily.