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Connect ACX7348 to Power

SUMMARY Learn how to ground the ACX7348 router and connect it to AC and DC power.

Connect Earth Ground to ACX7348 Routers

Before you begin to connect the router to earth ground, ensure that you have the following parts and tools available:

  • A grounding cable—6 AWG, 75 °C stranded copper wire (green with yellow insulation)
  • Two grounding screws to secure the grounding lug
  • LCD6-14A-L grounding lug
  • A Phillips (+) screwdriver, number 2 (not provided)
  • An electrostatic discharge (ESD) grounding wrist strap (not provided)

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must ground the router properly before connecting power.

You must install the ACX7348 in a restricted-access location and ensure that the chassis is always properly grounded. The ACX7348 has a two-hole protective grounding terminal provided on rear side of the chassis (see Figure 1). 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 two-hole grounding lug connection. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

Before you connect earth ground to the protective grounding terminal of an ACX7348 router, ensure that a licensed electrician has attached an appropriate grounding lug to the grounding cable.

Figure 1: Protective Grounding Terminal on the ACX7348 Router Protective Grounding Terminal on the ACX7348 Router

To ground the ACX7348 router:

  1. Verify that a licensed electrician has attached the cable lug that is provided with the router to the grounding cable.
  2. Ensure that all grounding surfaces are clean and brought to a bright finish before you make grounding connections.
  3. Connect the grounding cable to a proper earth ground.
  4. Place the grounding cable lug over the two-hole protective grounding terminal on the rear side of the chassis (see Figure 2).
    Figure 2: Connect the Grounding Cable to the ACX7348 Router Connect the Grounding Cable to the ACX7348 Router
  5. Secure the grounding cable lug with the screws.
  6. Dress the grounding cable and verify that it does not touch or block access to router components. Also make sure that the grounding cable does not drape where people could trip over it.

Connect AC Power to an ACX7348 Router

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

Before you begin connecting AC power to the router:

  • Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

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

    CAUTION:

    Before you connect power to the router, 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 router (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 earth ground before you connect it to power. Under all circumstances, use the protective grounding terminal on the router chassis to connect to the earth ground. The router gains additional grounding when you plug the PSM into the grounded AC power outlet by using the AC power cord appropriate for your geographical location.

  • Install the power supply module (PSM) in the chassis.

The PSM in an ACX7348 router is a hot-removable and hot-insertable field-replaceable unit (FRU). You can remove and replace it without powering off the router or disrupting routing functions.

To connect AC power to an ACX7348 router:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist. Connect the other end of the strap to the ESD point on the chassis.
  2. Power off the AC input appliance inlet on the source power supply.
  3. Connect the power cord to the power source outlet.
    Note:

    You must connect PSM to a dedicated AC power feed and a dedicated customer-site 2-pole circuit breaker. We recommend that you use a dedicated customer-site circuit breaker rated for 16 A, 250 VAC or as required by local code.
  4. Press the small tab on the power cord retainer strip to loosen the loop. Slide the loop until you have enough space to insert the power cord coupler into the inlet.
  5. Insert the power cord coupler firmly into the inlet.
  6. Slide the loop toward the PSM until it is snug against the base of the coupler.
  7. Press the tab on the loop and draw out the loop into a tight circle (see Figure 3).
  8. 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 over it.
  9. Power on the source power supply.
  10. Repeat Step 4 through Step 9 for connecting the other AC PSM to power.
    Figure 3: Connect an AC Power Cord to an ACX7348 Router Connect an AC Power Cord to an ACX7348 Router

Connect DC Power to an ACX7348 Router

Before you begin connecting DC power to the router:

  • Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

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

    CAUTION:

    Before you connect power to the router, 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 router (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 earth ground before you connect it to power. Under all circumstances, use the protective grounding terminal on the router chassis to connect to the earth ground.

  • Install the power supply module (PSM) in the chassis.

Ensure that you have the following parts and tools available:

  • Two DC power source cables. The ACX7348 supports a 6 AWG and 75 °C temperature-rated stranded copper wire.

  • An ESD grounding wrist strap (not provided)

  • Phillips (+) screwdriver, number 2 (not provided) for tightening screws on the PSM terminals.

  • Phillips (+) screwdriver, number 1 (not provided) for tightening the terminal cover screws.

  • Multimeter (not provided)

The PSM in an ACX7348 router is a hot-removable and hot-insertable field-replaceable unit (FRU). You can remove and replace it without powering off the router or disrupting routing functions.

To connect DC power to an ACX7348 router:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist. Connect the other end of the strap to the ESD point on the chassis.
  2. 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.
  3. The DC PSM has two terminals labeled -48V/-60V (negative) and RTN (positive) for connecting the DC power cables labeled positive (+) and negative (–). The terminals are covered by a cover on the terminal block.
  4. Using a screwdriver, unscrew (counterclockwise) the nut on top of the terminal block.
    Figure 4: Remove the Terminal Block Cover Remove the Terminal Block Cover
  5. Install heat-shrink tubing insulation around the power cables.

    To install heat-shrink tubing:

    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 is 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.

    Figure 5 shows the steps to install heat-shrink tubing.

    Note:

    Do not overheat the tubing.
    Figure 5: How to Install Heat-Shrink Tubing How to Install Heat-Shrink Tubing
  6. Remove the nuts from the four terminals in the terminal block. See Figure 6.
    Figure 6: Remove the Nuts from the Terminals Remove the Nuts from the Terminals
  7. Secure each power cable lug to the terminal with the nuts. Tighten the nuts on the power supply terminals until snug by using the screwdriver. Do not apply vertical force while tightening the screws. Use a socket nut driver to ensure you don't overtighten the nuts.
    Figure 7: Connect the DC Cable Connect the DC Cable
    Note:

    To connect the DC source to an ACX7348 router, use a 6 AWG and 75 °C temperature-rated stranded copper wire.

    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/-60V (input) terminal.

    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 into the terminal. Applying installation torque to the nuts when improperly threaded can 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.
  8. Place the terminal block cover on and tighten the screw. See Figure 7.
  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. Repeat Step 4 through Step 9 for connecting the other DC PSM to power.
  11. Close the input circuit breaker.
  12. Connect the DC PSM to the power sources.
    CAUTION:

    The connection between each power source and PSM must include a circuit breaker. We recommend that you use a customer-site 2-pole circuit breaker rated for 63 A, 80 VDC, or as required by local electrical code.