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Connecting the SRX5400 to Power

Tools and Parts Required for SRX5400 Firewall Grounding and Power Connections

To ground and provide power to the firewall, 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 firewall.

  • Wire cutters

  • Electrostatic discharge (ESD) grounding wrist strap

Grounding the SRX5400 Firewall

Warning:

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the firewall chassis before connecting power. You must install the SRX5400 in a restricted-access location and ensure that the chassis is always properly grounded. The SRX5400 has a two-hole protective grounding terminal provided on the chassis. See Figure 1. We recommend that you use this protective grounding terminal as the preferred method for grounding the chassis regardless of the power supply configuration. However, if additional grounding methods are available, you can also use those methods. For example, you can use the grounding wire in the AC power cord or use the grounding terminal or lug on a DC power supply. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

You ground the device by connecting a grounding cable to earth ground and then attaching it to the chassis grounding points using UNC 1/4-20 two screws. You must provide the grounding cable (the cable lug is supplied with the device).

  1. Verify that a licensed electrician has attached the cable lug provided with the device to the grounding cable.
  2. Attach an electrostatic discharge (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, and connect the strap to one of the ESD points on the chassis.
  6. Place the grounding cable lug over the grounding point. The grounding point is sized for UNC 1/4-20 screws and 1/4 in. split washers, which are provided in the accessory box.
  7. 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
  8. Dress the grounding cable and verify that it does not touch or block access to device components, and that it does not drape where people could trip on it.

Connecting Power to an AC-Powered SRX5400 Firewall

Warning:

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the firewall chassis before connecting power. See Grounding the SRX5400 Firewall for instructions.

CAUTION:

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

Note:

The SRX5400 Firewall and SRX5600 Firewall use the same power supply model.

You connect AC power to the device by attaching power cords from the AC power sources to the AC appliance inlets located on the power supplies. The power cords are not provided with the firewall.

To connect the AC power cords to the device for each power supply (see Figure 2):

  1. Locate or obtain the power cords you will use with the firewall. 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 other end of the strap to an ESD grounding point.
  3. Move the AC switch next to the appliance inlet on the power supply to the off position (O).
  4. Insert the appliance coupler end of the power cord into the appliance inlet on the power supply.
  5. Insert the power cord plug into an external AC power source receptacle.
    Note:

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

  6. Dress the power cord appropriately. Verify that the power cord does not block the air exhaust and access to device components, or drape where people could trip on it.
  7. Repeat Step 1 through Step 6 for the remaining power supplies.
Figure 2: Connecting AC Power to the FirewallConnecting AC Power to the Firewall

Powering On an AC-Powered SRX5400 Firewall

To power on an AC-powered firewall:

  1. Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
  2. Verify that the power supplies are fully inserted in the chassis.
  3. Verify that each AC power cord is securely inserted into the appliance inlet.
  4. Verify that an external management device is connected to one of the Routing Engine ports (AUX, CONSOLE, or ETHERNET).
  5. Turn on the power to the external management device.
  6. Switch on the dedicated customer site circuit breakers for the power supplies. Follow the ESD and safety instructions for your site.
  7. Move the AC input switch on each power supply to the on (|) position and observe the status LEDs on each power supply faceplate. If an AC power supply is correctly installed and functioning normally, the AC OK and DC OK LEDs light steadily, and the PS FAIL LED is not lit.

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

    Note:

    After you power off a power supply, wait at least 60 seconds before you turn it back on. Likewise, after you power on a power supply, wait at least 60 seconds beforeyou turn it off.

    If the system is completely powered off when you power on the power supply, the Routing Engine (or RCB) boots as the power supply completes its startup sequence. If the Routing Engine finishes booting and you need to power off the system again, first issue the CLI request system halt command.

    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.

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

Connecting Power to a DC-Powered SRX5400 Firewall

Warning:

Before you perform DC power procedures, ensure there is no power to 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 firewall chassis before connecting power. See Grounding the SRX5400 Firewall for instructions.

CAUTION:

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

Note:

The SRX5400 Firewall and SRX5600 Firewall use the same power supply model.

You connect DC power to the firewall 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 device).

To connect the DC source power cables to the firewall:

  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 other end of the strap to an ESD grounding point.
  3. Move the DC circuit breaker on the power supply faceplate to the off (O) position.
  4. Check the setting of the input mode switch. Use a sharp, nonconductive object to slide the switch to the desired position. Set the input mode switch to position 0 for 60-A input and position 1 for 70-A input. This setting is used by the power management software and must be set on the power supply. See Figure 3.
    Figure 3: DC Power Supply Input Mode Switch DC Power Supply Input Mode Switch
  5. Remove the clear plastic cover protecting the terminal studs on the faceplate.
  6. 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.
  7. Install heat-shrink tubing insulation around the power cables.

    To install heat-shrink tubing:

    1. Slide the tubing over the portion of the cable where it is attached to the lug barrel. Ensure that tubing covers the end of the wire and the barrel of the lug attached to it.

    2. Shrink the tubing with a heat gun. Ensure that you heat all sides of the tubing evenly so that it shrinks around the cable tightly.

    Figure 4 shows the steps to install heat-shrink tubing.

    Note:

    Do not overheat the tubing.
    Figure 4: How to Install Heat-Shrink Tubing How to Install Heat-Shrink Tubing
  8. Remove the nuts and washers from the terminal studs. (Use a 7/16-in. (11 mm) nut driver or socket wrench.)
  9. Secure each power cable lug to the terminal studs, first with the flat washer, then with the nut (see Figure 5). 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. (11 mm) 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.

  10. Route the power cables along the cable restraint toward the left or right corner of the chassis. If needed, thread plastic cable ties, which you must provide, through the openings on the cable restraint to hold the power cables in place.
  11. Replace the clear plastic cover over the terminal studs on the faceplate.
  12. Verify that the power cables are connected correctly, that they are not touching or blocking access to device components, and that they do not drape where people could trip on them.
  13. Repeat Steps 3 through 12 for the remaining power supplies.
Figure 5: Connecting DC Power to the DeviceConnecting DC Power to the Device

Powering On a DC-Powered SRX5400 Firewall

To power on a DC-powered firewall:

  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 RETURN) 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 other end of the strap to an ESD grounding point.
  9. Move the DC circuit breaker on each of the 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.

    If the power supply is not functioning normally, repeat the installation and cabling procedures.

    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 firewall 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 SRX5400 Firewall

Note:

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

To power off the firewall:

  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.
  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 other end of the strap to an ESD grounding point.
  4. On an AC-powered firewall, switch the AC switch on each power supply to the off position (O). On a DC-powered firewall, switch the circuit breaker on each power supply to the off position (OFF).

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