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Connecting the MX104 to Power

Connecting the MX104 Router to Earth Ground

To ground the router, you need the following tools:

  • Phillips (+) screwdriver, number 2

  • ESD grounding wrist strap

  • Two SAE 10-32 screws and flat washers

  • Grounding lug, Panduit LCD10-10-L

  • Grounding cable that meets the following specifications:

    • For AC systems—Use a 14-AWG (2.08 mm2) 90° C wire

    • For 24 V systems—Use 6-AWG (13.3 mm2) 60° C wire (not provided)

You ground the router by connecting a grounding cable to earth ground and then attaching it to the chassis grounding points on the front of the router. 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 front of the chassis (see Figure 1).
  8. Secure the grounding cable lug with the washers and screws. The holes are sized for SAE 10-32 screws. Apply 4.34 lb-in. (0.49 Nm) of torque to each screw. Do not overtighten the screw. (Use a number 2 Phillips screwdriver.)
    CAUTION:

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

    CAUTION:

    The maximum torque rating of the grounding screws on the router is 4.34 lb-in. (0.49 Nm). The grounding screws may be damaged if excessive torque is applied. Use only a torque-controlled driver to tighten screws. Use an appropriately sized driver, with a maximum torque capacity of 5 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.

  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 the MX104 RouterGrounding Points on the MX104 Router
  1
Grounding cable lug
  2
Screws

Connecting AC Power Cords to the MX104 Router

To connect AC power to the router, you need the following tools:

  • ESD grounding wrist strap

  • AC power cords

Warning:

You must ground the router before connecting the router to power.

To connect AC power to the router:

  1. Locate the power cords, which should have a plug appropriate for your geographical location. See the MX104 AC Power Cord Specifications.
  2. Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
  3. Insert the appliance coupler end of the power cord into the appliance inlet on the power supply.
  4. 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 10 A (100 VAC), or as required by local code.

  5. Secure the power cord with the power cord retainer clip.
  6. Dress 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.
  8. Observe the LED on the power supply. The LED blinks green as it transitions online. If the power supply is functioning normally, the LED lights green steadily.

    If the LED is red or not lit, the power supply is not functioning normally. Repeat the cabling procedures.

Figure 2: Connecting AC Power to the RouterConnecting AC Power to the Router

Connecting DC Power Cables to the MX104 Router

To connect power to the router, you need the following tools:

  • Phillips (+) screwdriver, number 2

  • ESD grounding wrist strap

  • Grounding ring lug with hole sized for an M5 screw

  • M5 nut and washer (one per DC power supply, attached)

  • DC power source cables, minimum 14 AWG or as required by local code (not provided)

  • DC power ring lugs, Panduit PV12-14HDRB-2k (two per DC power supply)

  • M6 screws and washers (two per DC power supply, attached)

  • Grounding cable, minimum 14 AWG or as required by local code (not provided)

The DC power supply has one grounding point and two terminals on each power supply, covered by a clear plastic cover.

Warning:

You must ground the router before connecting the DC power cables.

To connect the power cables:

  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. Ground the DC power supply (see Figure 3):
    1. Remove the nut and washer from the grounding point on the power supply.
    2. Secure each grounding cable lug to the grounding point with the washer and nut.
    Figure 3: Connecting the Ground Cable to the MX104 DC Power SupplyConnecting the Ground Cable to the MX104 DC Power Supply
  3. Remove the plastic cover protecting the terminal 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 resistance of the –48V and return DC cables to chassis ground:

    For –48V and –60V:

    1. The cable with very high resistance (indicating an open circuit) to chassis ground is the DC input cable ().

    2. The cable with very low resistance (indicating a closed circuit) to chassis ground is the return cable (+).

    For +24V:

    1. The cable with very low resistance (indicating a closed circuit) to chassis ground is the DC input cable ().

    2. The cable with very high resistance (indicating an open circuit) to chassis ground is the return cable (+).

  5. Remove the screws and washers from the terminals.
  6. Secure each power cable lug to the terminal with the washers and screw (see Figure 4). Apply 27.4 lb-in. (3.1 Nm) of torque to each screw. Do not overtighten the screw. (Use a number 2 Phillips screwdriver.)
    1. Secure the positive DC source power cable lug to the return (+) terminal.

    2. Secure the negative DC source power cable lug to the 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 it is improperly threaded may damage the terminal.

    CAUTION:

    The maximum torque rating of the terminal screws on the DC power supply is 27.4 lb-in. (3.1 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 27.4 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.

  7. Replace the plastic cover over the terminals on the faceplate.
  8. Connect each DC power cable to the appropriate external DC power source.
    Note:

    For information about connecting to external DC power sources, see the instructions for your site.

  9. Switch on the external circuit breakers to provide voltage to the DC power source cable leads.
  10. Repeat Step 2 through Step 9 for the remaining power supply.
  11. Observe the LED on the power supply. The LED blinks green as it transitions online. If the power supply is functioning normally, the LED lights green steadily.

    If the LED is red or not lit, the power supply is not functioning normally. Repeat the cabling procedures.

Figure 4: Connecting DC Power to the RouterConnecting DC Power to the Router