Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Connecting the SRX5800 to Power

 

Tools and Parts Required for SRX5800 Services Gateway Grounding and Power Connections

To ground and provide power to the services gateway, you need the following tools and parts:

  • Phillips (+) screwdrivers, numbers 1 and 2

  • 2.5-mm flat-blade (–) screwdriver

  • 7/16-in. hexagonal-head external drive socket wrench, or nut driver, with a torque range between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) tightening torque, for tightening nuts to terminal studs on each power supply on a DC-powered services gateway.

  • Wire cutters

  • Electrostatic discharge (ESD) grounding wrist strap

Grounding the SRX5800 Services Gateway

Warning

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the services gateway chassis before connecting power.

You ground the services gateway by connecting a grounding cable to earth ground and then attaching it to one of the chassis grounding points using two screws. You must provide the grounding cable (the cable lug is supplied with the services gateway).

  1. Verify that a licensed electrician has attached the cable lug provided with the services gateway to the grounding cable.
  2. Attach an ESD grounding strap to your bare wrist and connect the strap to an approved site ESD grounding point. See the instructions for your site.
  3. Ensure that all grounding surfaces are clean and brought to a bright finish before grounding connections are made.
  4. Connect the grounding cable to a proper earth ground.
  5. Detach the ESD grounding strap from the site ESD grounding point.
  6. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  7. Place the grounding cable lug over one of the two grounding points. The right pair is sized for UNC 1/4-20 screws and 1/4 in. split washers, which are provided in the accessory box. The left pair is sized for M6 metric screws. If you wish to use the metric-sized grounding point, you must provide appropriate screws and split washers.
  8. Secure the grounding cable lug to the grounding point, first with the washers, and then with the screws as shown in Figure 1.
    Figure 1: Connecting the Grounding Cable
    Connecting the Grounding
Cable
  9. Dress the grounding cable and verify that it does not touch or block access to services gateway components, and that it does not drape where people could trip on it.

Connecting Power to an AC-Powered SRX5800 Services Gateway

Warning

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the services gateway chassis before connecting power. See Grounding the SRX5800 Services Gateway for instructions.

Caution

Do not mix AC and DC power supplies within the same services gateway. Damage to the services gateway might occur.

You connect AC power to the device by attaching power cords from the AC power sources to the AC appliance inlets located on the chassis above the power supplies. If the services gateway is powered by high-capacity power supplies, you also connect AC feeds to AC appliance inlets located on the power supplies themselves. The power cords are not provided with the services gateway; you must order them separately.

To connect the AC power cords to the services gateway (see Figure 2 and Figure 3):

  1. Locate or obtain the power cords you will use with the services gateway. The power cords must have a plug appropriate for your geographical location.
  2. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  3. Move the AC input switch on the chassis above each power supply to the off  (O) position. If the services gateway is equipped with high-capacity AC power supplies, you must also move the AC input switch on each power supply to the off  (O) position.
  4. For each installed AC power supply, connect a power cord to the appliance inlet on the chassis directly above the power supply.
  5. If your services gateway is equipped with high-capacity AC power supplies, you must also connect a power cord to the appliance inlet located on each power supply.
  6. Insert the power cord plugs into an external AC power source receptacle.Note

    Each power supply must be connected to a dedicated AC power feed and a dedicated customer site circuit breaker. We recommend that you use a 15 A (250 VAC) minimum, or as required by local code.

  7. Dress the power cords appropriately. Verify that the power cords do not block the air exhaust and access to services gateway components, or drape where people could trip on them.
  8. Repeat Step 3 through Step 7 for the remaining power supplies.
Figure 2: Connecting AC Power to the Services Gateway (Standard-Capacity Power Supplies)
Connecting AC Power
to the Services Gateway (Standard-Capacity Power Supplies)
Figure 3: Connecting AC Power to the Services Gateway (High-Capacity Power Supplies)
Connecting
AC Power to the Services Gateway (High-Capacity Power Supplies)

Powering On an AC-Powered SRX5800 Services Gateway

To power on an AC-powered services gateway:

  1. Verify that the power supplies are fully inserted in the chassis.
  2. Verify that each AC power cord is securely inserted into its appliance inlet.
  3. Verify that an external management device is connected to one of the Routing Engine ports (AUX, CONSOLE, or ETHERNET).
  4. Turn on the power to the external management device.
  5. Switch on the dedicated customer site circuit breakers. Follow the ESD and safety instructions for your site.
  6. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  7. Switch the AC switch in the chassis above each power supply to the on () position.
  8. If the services gateway has high-capacity power supplies installed, you must also move the AC switch at the top of each power supply to the on (|) position.
  9. Verify the following LED indications for each installed power supply:
    • For standard-capacity AC power supplies, verify that the AC OK and DC OK LEDs light steadily and the PS FAIL LED is not lit.

    • For high-capacity AC power supplies, verify that the DC OK LED lights steadily, and the PS FAIL LED is not lit. In addition, the AC-1 OK LED should light green steadily if the upper AC feed (on the chassis above the power supply) is connected and receiving power, and the AC-2 OK LED should light green steadily if the lower AC feed (on the power supply itself) is connected and receiving power.

    Note

    After a power supply is powered on, it can take up to 60 seconds for status indicators—such as the status LEDs on the power supply and the show chassis command display—to indicate that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds.

    If any of the status LEDs indicates that the power supply is not functioning normally, repeat the installation and cabling procedures.

  10. On the external management device connected to the Routing Engine, monitor the startup process to verify that the system has booted properly.Note

    If the system is completely powered off when you power on the power supply, the Routing Engine boots as the power supply completes its startup sequence. Normally, the services gateway boots from the Junos OS imageon the CompactFlash card.

    After you have powered on a power supply, wait at least 60 seconds before you power it off.

Connecting Power to a DC-Powered SRX5800 Services Gateway

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.

Warning

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the services gateway chassis before connecting power. See Grounding the SRX5800 Services Gateway for instructions.

Caution

Do not mix AC and DC power supplies within the same services gateway. Damage to the services gateway might occur.

You connect DC power to the services gateway by attaching power cables from the external DC power sources to the terminal studs on the power supply faceplates. You must provide the power cables (the cable lugs are supplied with the services gateway).

To connect the DC source power cables to the services gateway:

  1. Switch off the dedicated customer site circuit breakers. Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation.
  2. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  3. Move the DC circuit breaker on the power supply faceplate to the off (O) position.
  4. Remove the clear plastic cover protecting the terminal studs on the faceplate.
  5. 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 large resistance (indicating an open circuit) to chassis ground is –48V.

    • The cable with very low resistance (indicating a closed circuit) to chassis ground is RTN.

    Caution

    You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply.

  6. Remove the nuts and washers from the terminal studs. (Use a 7/16-in. nut driver or socket wrench.)
  7. Secure each power cable lug to the terminal studs, first with the split washer, then with the nut (see Figure 4). Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut. (Use a 7/16-in. nut driver or socket wrench.)
    1. Secure each positive (+) DC source power cable lug to the RTN (return) terminal.

    2. Secure each negative (–) DC source power cable lug to the –48V (input) terminal.

    The DC power supplies in slots PEM0 and PEM1 must be powered by dedicated power feeds derived from feed A, and the DC power supplies in slots PEM2 and PEM3 must be powered by dedicated power feeds derived from feed B. This configuration provides the commonly deployed A/B feed redundancy for the system.

  8. For standard-capacity DC power supplies, secure each DC power cable to its strain relief bracket as follows:

    1. Loosen the captive screw on the cable restraint on the lower edge of the power supply faceplate.
    2. Route the positive and negative DC power cables through the left and right sides of the cable restraint.
    3. Tighten the cable restraint captive screw to hold the power cables in place.
  9. Replace the clear plastic cover over the terminal studs on the faceplate.
  10. Verify that the power cables are connected correctly, that they are not touching or blocking access to services gateway components, and that they do not drape where people could trip on them.
  11. Repeat Steps 3 through 10 for the remaining power supplies.
Figure 4: Connecting DC Power to the Services Gateway (Standard-Capacity SHown, High-Capacity Similar)
Connecting DC Power
to the Services Gateway (Standard-Capacity SHown, High-Capacity Similar)

Powering On a DC-Powered SRX5800 Services Gateway

To power on a DC-powered services gateway:

  1. Verify that an external management device is connected to one of the Routing Engine ports (AUX, CONSOLE, or ETHERNET).
  2. Turn on the power to the external management device.
  3. Verify that the power supplies are fully inserted in the chassis.
  4. Verify that the source power cables are connected to the appropriate terminal: 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 the INPUT OK LED is lit steadily green to verify that power is present.
  7. If power is not present:
    • Verify that the fuse is installed correctly and turn on the breaker at the battery distribution fuse board or fuse bay.

    • Check the voltage with a meter at the terminals of the power supply for correct voltage level and polarity.

  8. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  9. Move the DC circuit breaker on the DC power supplies to the on (|) position.
  10. Verify that the BREAKER ON LED is lit green steadily.
  11. Verify that the PWR OK LED is lit green steadily, indicating the power supply is correctly installed and functioning normally.Note

    After a power supply is powered on, it can take up to 60 seconds for status indicators—such as the status LEDs on the power supply and the show chassis command display—to indicate that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds.

    If any of the status LEDs indicates that the power supply is not functioning normally, repeat the installation and cabling procedures .

  12. On the external management device connected to the Routing Engine, monitor the startup process to verify that the system has booted properly.Note

    If the system is completely powered off when you power on the power supply, the Routing Engine boots as the power supply completes its startup sequence. Normally, the services gateway boots from the Junos OS image on the CompactFlash card.

    After powering on a power supply, wait at least 60 seconds before turning it off.

Powering Off the SRX5800 Services Gateway

Note

After powering off a power supply, wait at least 60 seconds before turning it back on.

To power off the services gateway:

  1. On the external management device connected to the Routing Engine, issue the request system halt operational mode command. The command shuts down the Routing Engine cleanly, so its state information is preserved.
    user@host> request system halt
  2. Wait until a message appears on the console confirming that the operating system has halted.

    For more information about the command, see Junos OS System Basics and Services Command Reference at www.juniper.net/documentation/.

  3. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  4. Switch off the power supplies:
    • For an AC-powered services gateway, move the AC input switch on the chassis above each AC power supply to the off  (O) position. If the services gateway is equipped with high-capacity AC power supplies, you must also move the AC input switch on each power supply to the off  (O) position.

    • For a DC-powered services gateway, move the DC circuit breaker on each DC power supply faceplate to the off  (O) position.