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    Connect Power to a Seven-Feed DC Power Distribution Module

    1. 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 MX2010 3D Universal Edge Router Hardware Guide.

      Note: If the DC PSMs are installed in the router, make sure the power switch is turned to the off (O) position.

    2. 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.
    3. Remove the DC PDM from the electrostatic bag.
    4. Using both hands, slide the PDM part way into the chassis.
    5. Open the two locking levers on either side of the PDM, and align them with the openings in the chassis.
    6. Using both hands, push firmly on both spring loaded levers until the PDM is fully seated in the chassis slot. The PDM faceplate should be flush. Tighten both captive screws.

      Note: Make sure the DC circuit feed switch on the PDM faceplate matches the current rating amperage, (60A) or (80A). This switch applies to all inputs of this PDM, and that selecting 60A reduces the available power output capacity of the PSMs supplied by this PDM.

    7. Loosen the captive screws on the clear plastic cable restraint protecting the terminal studs on the faceplate of the PDM.
    8. Secure the power cable lugs to the terminal studs, first with the split washer, then with the nut. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) torque to each nut (see Figure 1). Do not overtighten the nut. (Use a 7/16-in. [11 mm] torque-controlled driver or socket wrench.).

      Table 1 describes the DC operating range specifications.

      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.

      Table 1: MX2010 DC Power System Input Voltage



      DC input voltage

      Operating range: –40 to –72 VDC

      Figure 1: Connecting Ground and DC Power Cables

      Connecting Ground
and DC 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 the nut is improperly threaded may result in damage to the terminal stud.

      Caution: The maximum torque rating of the terminal studs on the DC PDM is 25 lb-in. (33.89 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 PDM terminal studs.

      Note: For information about connecting to DC power sources, see the MX2010 3D Universal Edge Router Hardware Guide.

    9. Connect each DC power cable to the appropriate external DC power source.

      Note: For information about connecting to external DC power sources, see the MX2010 3D Universal Edge Router Hardware Guide.

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

      Note: Each PDM must be connected to a dedicated 60A or 80A DC circuit breaker for the DC power source. The PDM has a switch to accommodate DC circuit breaker amperage.

    11. Verify that the power cabling is correct, that the cables are not touching, and that they do not block access to router components or drape where people could trip on them.
    12. Close the cable restraint cover over the terminal studs, and tighten the captive screws.

    Modified: 2016-03-29