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Connecting the MX5, MX10, MX40, and MX80 Routers to Power

Tools and Parts Required for MX5, MX10, MX40, and MX80 Router Grounding and Power Connections

To ground and provide power to the router, you need the following tools and parts:

  • Phillips (+) screwdrivers, numbers 1 and 2

  • 2.5-mm flat-blade (–) screwdriver

  • Torque-controlled driver, with a maximum torque capacity of 6 lb-in., for tightening screws to terminals on each power supply on a DC-powered router

    CAUTION:

    The maximum torque rating of the terminal screws on the DC power supply is 6 lb-in. (0.7 Nm). The terminal screws may be damaged if excessive torque is applied. Use only a torque-controlled driver to tighten screws on the DC power supply terminals. Use an appropriately sized driver, with a maximum torque capacity of 6 lb-in. or less. Ensure that the driver is undamaged and properly calibrated and that you have been trained in its use. You may wish to use a driver that is designed to prevent overtorque when the preset torque level is achieved.

  • Wire cutters

  • Electrostatic discharge (ESD) grounding wrist strap

Grounding MX5, MX10, MX40, and MX80 Routers

You ground the router by connecting a grounding cable to earth ground and then attaching it to the chassis grounding points using two SAE 10-32 screws. You must provide the grounding cables (the cable lugs are supplied with the router). For grounding cable specifications, see MX5, MX10, MX40, and MX80 Router Grounding Specifications. To ground the router:

  1. Verify that a licensed electrician has attached the cable lug provided with the router to the grounding cable.
  2. Attach an ESD grounding strap to your bare wrist, and connect the other end of 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.
  6. Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
  7. Place the grounding cable lug over the grounding points on the upper rear of the chassis (see Figure 1).
  8. Secure the grounding cable lug with the screws. The holes are sized for SAE 10-32 screws.
  9. Dress the grounding cable, and verify that it does not touch or block access to router components, and that it does not drape where people could trip on it.
Figure 1: Grounding Points on MX5, MX10, MX40, and MX80 RoutersGrounding Points on MX5, MX10, MX40, and MX80 Routers

Connecting Power to an AC-Powered MX5, MX10, MX40, and MX80 Router

CAUTION:

Do not mix AC and DC power supply modules within the same router. Damage to the router might occur.

You connect AC power to the router by attaching power cords from the AC power sources to the AC appliance inlets located on the power supplies.

To connect the AC power cords to the router for each power supply:

  1. Locate power cords that have a plug appropriate for your geographic location. For more information, see Replacing an MX5, MX10, MX40, and MX80 AC Power Supply.
  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 input switch next to the appliance inlet on the power supply to the off (O) position.
  4. Connect the power cord to 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 customer site circuit breaker. We recommend that you use a dedicated customer site circuit breaker rated for 15 A (110 VAC) minimum, or as required by local code.

  6. Route the power cord appropriately. Verify that the power cord does not block the air exhaust and access to router components, or drape where people could trip on it.
  7. Repeat Step 1 through Step 6 for the remaining power supply.

Powering On an AC-Powered MX5, MX10, MX40, and MX80 Router

To power on an AC-powered router:

  1. Verify that the power supplies are fully inserted in the chassis.
  2. Verify that each AC power cord is securely inserted into its appliance inlet.
  3. Verify that an external management device is connected to one of the Routing Engine ports (AUX, CONSOLE, or ETHERNET).
  4. Turn on the power to the external management device.
  5. Switch on the dedicated customer site circuit breakers for the power supplies. Follow the instructions for your site.
  6. Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
  7. Switch the AC input switch on each power supply to the on ( | ) position, and observe the status LED on each power supply faceplate. If an AC power supply is correctly installed and functioning normally, the status LED above each AC input switch lights steadily green.

    If the status LED on the power supply is lit red, the power supply is not functioning normally. Repeat the installation and cabling procedures.

    Note:

    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 60 seconds before turning 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 MX5, MX10, MX40, and MX80 Router

CAUTION:

Do not mix AC and DC power supply modules within the same router. Damage to the router might occur.

Warning:

Before performing DC power procedures, 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, and tape the switch handle of the circuit breaker in the off position.

You connect DC power to the router by attaching power cables from the external DC power sources to the terminal on the power supply faceplate. You must provide the power cables (the cable lugs are supplied with the router). For power cable specifications, see DC Power Cable Specifications for MX5, MX10, MX40, and MX80 Routers.

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

  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. Switch the DC circuit breaker on the power supply faceplate to the off (O) position.
  4. Remove the clear plastic cover protecting the terminal on the faceplate.
  5. 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.

  6. Remove the screws from the terminals.
  7. Secure each power cable lug to the terminal with the screw (see Figure 2). Apply between 5 lb-in. (0.6 Nm) and 6 lb-in. (0.7 Nm) of torque to screw. Do not overtighten the nut. (Use a number 2 Phillips screwdriver.)
    1. Secure the positive (+) DC source power cable lug to the RTN (return) terminal.

    2. Secure the negative (–) DC source power cable lug to the –48V (input) terminal.

    CAUTION:

    Ensure that each power cable lug seats flush against the surface of the terminal block as you are tightening the screws. Ensure that each screw is properly threaded into the terminal. Applying installation torque to the screw when improperly threaded may result in damage to the terminal.

    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.

    Note:

    For information about connecting to DC power sources, see MX5, MX10, MX40, and MX80 Routers DC Power Specifications.

  8. Replace the clear plastic cover over the terminals on the faceplate.
  9. Verify that the power cables are connected correctly, that they are not touching or blocking access to router components, and that they do not drape where people could trip on them.
  10. If you are installing two power supplies, repeat Steps 3 through 9 for the other power supply.
Figure 2: Connecting DC Power to the RouterConnecting DC Power to the Router

Powering On a DC-Powered MX5, MX10, MX40, and MX80 Router

To power on a DC-powered router:

  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 RTN) 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.
  6. Check that the status LED on the power supply faceplate is lit steadily blue 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. On each of the DC power supplies, switch the DC circuit breaker to the center position before moving it to the on ( | ) position.
    Note:

    The circuit breaker may bounce back to the off (O) position if you move the breaker too quickly.

    Observe the status LED on each power supply faceplate. If a DC power supply is correctly installed and functioning normally, the status LED lights blue steadily.

    If the status LED on the power supply is blinking red, the power supply is not functioning normally. Repeat the installation and cabling procedures.

    Note:

    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 60 seconds before turning 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.

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

Powering Off MX5, MX10, MX40, and MX80 Routers

Note:

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

To power off the router:

  1. On the external management device connected to the Routing Engine, issue the request system halt command.
  2. Wait until a message appears on the console confirming that the operating system has halted. For more information about the command, see the CLI Explorer.
  3. Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
  4. Switch the AC input switch on each AC power supply or the DC circuit breaker on each DC power supply to the off (O) position.