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Connect SSR1400 to Power

SUMMARY Connecting power to the SSR1400 appliance involves numerous steps and safety precautions to prevent equipment damage and personal injury.

Note:

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the SSR1400 appliance to an earth ground before you connect it to power.

Connect Earth Ground to the SSR1400

Note:

Before you connect power to the SSR1400, 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 SSR1400, connect a grounding cable to earth ground. Attach the grounding cable to the chassis grounding point located on the rear of the appliance.

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 one-hole grounding ring terminal connection. This tested system meets or exceeds all applicable EMC regulatory requirements with the one-hole protective grounding ring terminal.

You must provide the following items:

  • Grounding cable: The grounding cable must be at least 14 AWG (1.5 mm²) stranded wire and be rated 90 °C or per local electrical code.

  • Grounding ring terminal for your grounding cable: This bracket attaches to the to the chassis grounding point located on the rear of the appliance.

  • A Phillips screwdriver to tighten the screw.

  • An electrostatic discharge (ESD) grounding strap.

We recommend that you install heat-shrink tubing insulation around the crimped section of the earthing cable and ring terminal.

To ground the appliance:

  1. Wrap and fasten one end of the ESD grounding strap around your wrist and connect the other end to a site ESD point.
  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. Using a Phillips screwdriver, remove the M5 pan head screw from the grounding point on the rear of the chassis.
  5. Place the grounding cable ring terminal attached to the grounding cable over the grounding point.
  6. Secure the grounding cable ring terminal to the grounding point with the M5 pan head screw.
    Figure 1: Connect the Grounding Cable to the SSR1400 Connect the Grounding Cable to the SSR1400
  7. Dress the grounding cable and verify that it does not touch or block access to the appliance components and that it does not cause a tripping hazard
    Note:

    The appliance should be permanently connected to ground during operation.

Connect AC Power to the SSR1400

The AC power supply units (PSUs) in an SSR1400 are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace the PSUs without powering off the appliance or disrupting its functions.

Before you begin to connect AC power to the appliance:

  • Ensure that you have connected the appliance chassis to an earth ground.

    CAUTION:

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

    To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to an earth ground before you connect it to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the appliance chassis to connect to the earth ground. The appliance gains additional grounding when you plug the PSM in the router to a grounded AC power outlet by using the AC power cord appropriate for your geographical location.

  • Ensure that you have a power cord appropriate for your geographical location available to connect AC power to the appliance.

  • Read General Electrical Safety Guidelines and Warnings and Action to Take After an Electrical Accident.

  • Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage.

  • Ensure that you have an ESD grounding strap.

  • If not already installed, install the power supplies in the appliance.

To connect AC power to an SSR1400:

  1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the appliance.
  2. Ensure that the power supplies are fully inserted into the chassis.
  3. Locate the AC power cords shipped with the SSR1400 appliance; the cords have plugs appropriate for your geographical location. See Table 7.
  4. Pull the power cord retainer down and insert the coupler end of the power cord into the AC power cord inlet on the AC power supply faceplate (see Figure 2) .
  5. Push the power cord retainer onto the power cord (see Figure 2).
    Figure 2: Connect AC Power Cord Connect AC Power Cord
  6. Repeat step 4 and step 5 to insert the second power cord.
  7. If the AC power source outlet has a power switch, set it to the off (O) position.
  8. Insert the power cord plug into an AC power source outlet.
  9. If the AC power source outlet has a power switch, set it to the on (|) position.
  10. Set the power switch on the appliance to the on (|) position.

Connect DC Power to the SSR1400-DC

Use the following procedure to connect DC power to the SSR1400-DC.

CAUTION:

Do not attempt to install a DC power supply into an SSR1400 that originally contained an AC power supply. This may result in damage to the SSR1400, and the appliance may not function.

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 Connect Earth Ground to the SSR1400 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. It is recommended to use a non-contact voltage tester to confirm that nothing is energized.
CAUTION:

Do not mix AC and DC power supplies within the same SSR device. Damage will occur.
CAUTION:

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

Wire the DC power supply using the appropriate lugs. When connecting power, the proper wiring sequence is:

  1. Ground to Ground

  2. Positive (+) DC source power cable lug to a (+) RTN (return) terminal.

  3. Negative (–) DC source power cable lug to a -48V (input) terminal

When disconnecting power, the proper wiring sequence is:

  1. Negative (–) DC source power cable lug to a -48V (input) terminal

  2. Positive (+) DC source power cable lug to a (+) RTN (return) terminal.

  3. Ground to Ground

Note that the ground wire should always be connected first and disconnected last.

When stranded wiring is required, use approved wiring terminations, such as closed-loop or spade-type with upturned lugs. These terminations should be the appropriate size for the wires and should clamp both the insulation and conductor.

The table below summarizes the specifications for the power cable(s), which you must supply.

Table 1: SSR1400-DC Power and Ground Cable Specifications

Cable Type

Quantity and Specification

Stud Size

Ring Connector

Power

14-16 AWG, minimum 60° C wire, or as permitted by the local code

M3

Exterior diameter no greater than 5.84mm/.230 inches.
Ground 14 AWG (1.5 mm²) stranded wire rated 90 °C or per local electrical code.

M5

To connect the DC source power cables to each power supply on the SSR1400-DC:

  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. It is best practice to NOT connect the power cables to the DC power source until AFTER all device connections have been made.
  2. If the power cables specified in the table above and prepared by a licensed electrician do not have heat-shrink tubing insulation around the connection lugs, use the procedure below to do so:

    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 3: 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 number 2 Phillips (+) screwdriver.
    Figure 4: Disconnect/Reconnect DC Terminals
  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.
    Note:

    The text on the power supply describing each terminal is upside down. This is correct for the orientation of the power supply.

    • 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 device components, and they do not cause a tripping hazard.
  9. Repeat Steps 1 through 8 for the second power supply.
Note:

If power is lost to the SSR1400, the Power-On/Power-Off state is retained. For example, if the device loses power while the device is on, when power returns, the device will still be in the On state.

Power On the SSR1400

To power on the SSR1400

  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 SSR1400 is operating normally.

Power Off the SSR1400

You can power off the SSR1400 in one of the following ways:

  • Graceful shutdown—You can do a graceful shutdown in two ways:

    • Use the Linux poweroff command at the Console. The appliance begins gracefully shutting down the operating system and then powers itself off.

    • Press and hold the power switch for less than 4 seconds. The appliance begins gracefully shutting down the operating system and then powers itself off.

    CAUTION:

    Use the graceful shutdown method to power off or reboot the appliance.

  • Forced shutdown—Press and hold the power switch for more than 4 seconds, then release. The appliance immediately powers itself off without shutting down the operating system.

    CAUTION:

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

    Use the forced shutdown method as a last resort to recover appliance if the appliance operating system is not responding to the graceful shutdown method.
Warning:

Do not press the power switch while the appliance is shutting down.

To remove power completely from the appliance, unplug the power cord or switch off the 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.