Step 6: Connect Power Cables

Depending on its configuration, the services gateway uses either AC or DC power supplies. Perform the appropriate procedures for each power supply in the services gateway.

Connect Power to an AC-Powered Services Gateway

Note: The device is not shipped with AC power cords. Make sure to order or obtain AC power cords with a plug appropriate for your geographical location.

  1. Locate the power cords you will use to connect the device to AC power. See the SRX5800 Services Gateway Hardware Guide for specifications.
  2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. For more information about ESD, see the SRX5800 Services Gateway Hardware Guide.
  3. For each power supply:
    1. Move the power switch above the power supply to the OFF position (O).
    2. Insert the appliance coupler end of the power cord into the appliance inlet above 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 customer site circuit breaker. We recommend using a 15-A (250-VAC), circuit breaker minimum, or as permitted by local code.

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

      Figure 9: Connecting AC Power to the Services Gateway

      Connecting AC
Power to the Services Gateway

Connect Power to a DC-Powered Services Gateway

Table 2 describes the services gateway input voltage requirements.

Table 2: SRX5800 Services Gateway DC Power System Input Voltage

Item

Specification

DC input voltage

Operating range: –40 to –72 VDC

  1. 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. Secure the power cable lugs to the terminal studs, first with the split washers, then with the nuts as shown in Figure 10. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut. Do not overtighten the nut. (Use a 7/16-in. torque-controlled driver or socket wrench.)
    1. Attach the positive (+) DC source power cable lug to the RTN (return) terminal.
    2. Attach the negative (–) DC source power cable lug to the –48V (input) terminal.

    Figure 10: Connect Power Cables

    Connect Power Cables

    Caution: Ensure that each power cable lug seats flush against the surface of the terminal block as you are tightening the nuts. Ensure that each nut is properly threaded onto the terminal stud. The nut should be able to spin freely with your fingers when it is first placed onto the terminal stud. Applying installation torque to the nut when improperly threaded may result in damage to the terminal stud.

    Caution: The maximum torque rating of the terminal studs on the DC power supply is 58 lb-in. (6.5 Nm). The terminal studs may be damaged if excessive torque is applied. Use only a torque-controlled driver or socket wrench to tighten nuts on the DC power supply terminal studs.

    Note: For information about connecting to DC power sources, see the SRX5800 Services Gateway Hardware Guide.

  3. Loosen the captive screw on the cable restraint on the lower edge of the power supply faceplate.
  4. Engage the DC power cables with the cable restraint, and tighten the captive screw.
  5. Connect each DC power cable to the appropriate external DC power source.

    Note: For information about connecting to external DC power sources, see the SRX5800 Services Gateway Hardware Guide.

  6. Switch on the external circuit breakers to provide voltage to the DC power source cable leads.

Proceed to Step 7: Perform the Initial Software Configuration.