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Connecting the SRX1500 to Power

Required Tools and Parts for Grounding the SRX1500 Services Gateway

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

  • Phillips (+) screwdrivers, numbers 1 and 2

  • Electrostatic discharge (ESD) grounding wrist strap

  • Wire cutters

Connecting the SRX1500 Firewall Grounding Cable

You ground the services gateway by connecting a grounding cable to earth ground and then attaching it to the chassis grounding points located on the back panel of the device using two #10-32, 0.5 inch-long grounding screws. You must install the SRX1500 in a restricted-access location and ensure that the chassis is always properly grounded. The SRX1500 has a two-hole protective grounding terminal provided on the chassis. See Figure 1. Under all circumstances, use this grounding connection to ground the chassis. For AC-powered systems, you must also use the grounding wire in the AC power cord along with the two-hole grounding lug connection. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

You must provide the following items:

  • Two #10-32, 0.5 inch-long grounding screws

  • Grounding cables

  • Cable lugs (for example, Panduit LCC6-10A-L)

CAUTION:

Before you connect power to the services gateway, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the services gateway (for example, by causing a short circuit).

To ground the services gateway:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis. For more details, see Prevention of Electrostatic Discharge Damage.
  2. Ensure that all grounding surfaces are clean and brought to a bright finish before grounding connections are made.
  3. Connect the grounding cable to a proper earth ground.
  4. Place the grounding cable lugs over the grounding points (sized for #10-32, 0.5 inch-long grounding screws).
    Figure 1: Connecting the Grounding Cable to the SRX1500 Firewall Connecting the Grounding Cable to the SRX1500 Firewall
  5. Secure the grounding cable lugs to the grounding points, first with the washers, then with the screws.
  6. Dress the grounding cable and verify that it does not touch or block access to the services gateway components and that it does not drape where people could trip on it.

Connecting the SRX1500 Firewall to an AC Power Supply

CAUTION:

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

You connect AC power to the services gateway by attaching the power cord from the AC power source to the AC appliance inlet located on the power supply.

To connect the services gateway to an AC power supply:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the front of the chassis.
  2. Insert the appliance coupler end of the power cord into the appliance inlet on the power supply.
  3. 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.

  4. Dress the power cord appropriately. Verify that the power cord does not block the air exhaust and access to services gateway components or drape where people could trip on it.
Note:

The services gateway must be connected to earth ground during normal operation. The protective earthing terminal on the side of the chassis is provided to connect the services gateway to ground.

CAUTION:

We recommend using a surge protector for the power connection.

Connecting the SRX1500 Firewall to a DC Power Supply

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.

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 Connecting the SRX1500 Services Gateway Grounding Cable for instructions.

Warning:

Before performing the following procedure, 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 (0), and tape the switch handle of the circuit breaker in the OFF position.

CAUTION:

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

CAUTION:

Before you connect power to the services gateway, a licensed electrician must attach appropriate cable lugs to the grounding and power cables that you use. A cable with an incorrectly attached lug can damage the device (for example, by causing a short circuit).

To connect the DC source power cables to the services gateway for each power supply:

  1. Switch off the dedicated facility 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. Install heat-shrink tubing insulation around the power cables:

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

      Note:

      Do not overheat the tubing.

      Figure 2 shows how to install heat-shrink tubing.

      Figure 2: How to Install Heat-Shrink Tubing How to Install Heat-Shrink Tubing
  3. Remove the clear plastic cover that protects the terminal studs on the faceplate.
  4. 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 ohm output of the -48V and RTN DC cables to chassis ground. The cable with very large resistance (indicating an open circuit) to chassis ground will be -48V, and the cable with very low resistance (indicating a closed circuit) to chassis ground will be 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.

  5. Remove the screws and square washers from the terminals, using a Phillips (+) screwdriver, number 2.
  6. Secure each power cable lug to the terminals with the square washers and the screws. Apply between 23 in.-lb (2.6 Nm) and 25 in.-lb (2.8 Nm) of torque to each screw.

    • Secure each positive (+) DC source power cable lug to a RTN (return) terminal.

    • Secure each negative (–) DC source power cable lug to a -48V (input) terminal.

  7. Replace the clear plastic cover over the terminal studs on the faceplate.
  8. Verify that the power cables are connected correctly, that they are not touching or blocking access to services gateway components, and they do not cause a tripping hazard.
  9. Repeat Steps 1 through 8 for the second power supply, if you are installing one.
Note:

If power is lost to the services gateway, the Power-On/Power-Off state is retained. For example, if the services gateway loses power while the device is on, when power returns, the device will still be in the On state.

Powering On the SRX1500 Services Gateway

To power on the services gateway:

  1. Ensure that you have connected the power supply to the device.
  2. Insert the plug of the power supply adapter into an AC or DC power source receptacle.

    1. Using AC power supply—Insert the appliance coupler end of the power cord into the appliance inlet on the power supply and the power cord plug into an external AC power source receptacle.

    2. Using DC power supply—Connect DC power cables to the A+ and A- terminals and the other ends to an external DC power source. If you have two DC power sources and wish to deploy A/B feed redundancy for the services gateway, also connect DC power cables to the B+ and B- terminals and the other ends to an external DC power source.

      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 terminals on the power supply.

  3. Turn on the power to the AC or DC power receptacle.

The device starts automatically as the power supply completes its startup sequence. The PWR LED (on the front panel of the chassis) lights up during startup and remains solid when the services gateway is operating normally.

Powering Off the SRX1500 Firewall

To power off the device, press the Power button on the front of the device and hold it for 10 seconds. To remove power completely from the services gateway, unplug the AC power cord or DC power supply cable.

Note:

Graceful shutdown is not supported on the SRX1500 Firewall.

After powering off a power supply, wait at least 60 seconds before turning it back on. After powering on a power supply, wait at least 10 seconds before turning it off.

When the system is completely powered off and you turn on the power supply, the services gateway starts as the power supply completes its startup sequence. If the services gateway finishes starting and you need to power off the system again, first issue the request system halt command.

Note:

The fans in the power supply continue to rotate even after you power off the SRX1500 Firewall. To stop the fans, remove the power cord from the power supply. The fans stop in a few seconds.

After a power supply is turned on, it can take up to 60 seconds for status indicators—such as the POWER LED (on the front panel of the chassis) 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.