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Connecting the SRX345 to Power

 

Required Tools and Parts for Grounding the SRX345 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 SRX345 Services Gateway Grounding Cable

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.

You ground the services gateway by connecting a grounding cable to earth ground and then attaching it to the chassis grounding point located on the side of the device using two #10-32 UNF screws.

You must provide the following items:

  • Two #10-32 UNF screws, with recommended length of 6 mm through 8 mm

  • 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 device:

  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 lug over the grounding point (sized for #10-32 UNF screws) on the side of the chassis.
    Figure 1: Connecting the Grounding Cable to the SRX345 Services Gateway
    Connecting the Grounding Cable to the SRX345 Services
Gateway
  5. Secure the grounding cable lug to the grounding point, first with the washer, 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.

Note

The device should be permanently connected to ground during operation.

Connecting the SRX345 Services Gateway to an AC Power Supply

You connect AC power to the services gateway by attaching a power cord from the AC power source to the AC appliance inlet located on the power supply faceplate. To connect the device to the power supply:

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.

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

    We strongly recommend that you use only the 3-prong power cord supplied with your services gateway.

  3. Insert the power cord plug into an external AC power source receptacle as shown in Figure 2. 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.
    Figure 2: Connecting the SRX345 Services Gateway to an AC Power Supply
    Connecting
the SRX345 Services Gateway to an AC Power Supply
  4. If you are using a SRX345 Services Gateway with dual AC power supplies, then repeat steps 1 through 3 for the second power supply.
Caution

We recommend using a surge protector for the power connection.

Connecting the SRX345 Services Gateway 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 rear panel of the 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 Connecting the SRX345 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

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:

  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. Remove the clear plastic cover that protects the terminal studs.
  3. 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 is -48V, and 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.

  4. Remove the screws and square washers from the terminals, using a Phillips (+) screwdriver, number 2.
  5. Secure each power cable lug to the terminals with the square washers and the screws. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each screw. See Figure 3
    • Secure the positive (+) DC source power cable lug to the + (return) terminal.

    • Secure the negative (–) DC source power cable lug to a (input) terminal.

    Figure 3: Connecting the SRX345 Services Gateway to a DC Power Supply
    Connecting
the SRX345 Services Gateway to a DC Power Supply
  6. Replace the clear plastic cover over the terminal studs on the faceplate.
  7. Verify that the power cables are connected correctly, that they do not touch or block access to services gateway components, and they do not cause a tripping hazard.

Powering On the SRX345 Services Gateway

To power on the services gateway:

  1. Insert the power cord plug into the AC power source receptacle.
  2. Turn on the power to the AC power receptacle. Observe the power supply faceplate LED. If the power supply is installed correctly and functioning normally, the LED glows steady green.
  3. If you are using a SRX345 Services Gateway with dual AC power supplies, then repeat steps 1 and 2 for the second power supply.

The device starts automatically as the power supply completes its startup sequence. The PWR LED lights during startup and remains on when the device is operating normally.

Note

After the power supply is turned on, it can take up to 60 seconds for status indicators—such as the STAT and PWR LEDs—to show that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds.

Note

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

Powering Off the SRX345 Services Gateway

You can power off the services gateway in one of the following ways:

  • Graceful shutdown—Press and immediately release the Power button. The device begins gracefully shutting down the operating system and then powers itself off.

    Caution

    Use the graceful shutdown method to power off or reboot the services gateway.

  • Forced shutdown—Press the Power button and hold it for ten seconds. The device immediately powers itself off without shutting down the operating system.

    Caution

    Use the forced shutdown method as a last resort to recover the services gateway if the services gateway operating system is not responding to the graceful shutdown method.

Warning

Do not press the Power button while the device is shutting down.

Caution

Forced shutdown can result in data loss and corruption of the file system.

Note

To remove power completely from the device, unplug the power cord or switch off the AC power source.

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

The Power button on the services gateway is a standby power switch, which will not turn off the input power to the services gateway.

Tip

When you are powering off the device, the CLI displays the following message: Turning the system power off. You can now safely remove the power cable to completely power off the device.

Note

You can use the request system reboot CLI command to schedule a reboot.