Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 
ON THIS PAGE
 

ACX7332 Power Supply Module Maintenance

SUMMARY Maintaining an ACX7332 router includes replacing power supplies. Replacing includes removing a failed power supply and installing a functional power supply.

The power supply modules (PSMs) in an ACX7332 router are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace the PSMs without powering off the router or disrupting routing functions.

Remove an ACX7332 AC Power Supply Module

Before you remove a PSM from a 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 the following parts and tools available to remove a PSM from a router:

  • ESD grounding strap

  • Antistatic bag or an antistatic mat

To remove an AC PSM from an ACX7332 router:

  1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  2. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to the ESD point on the chassis.
  3. Disconnect power to the router. If the AC power source outlet has a power switch, set it to the off (O) position. If the AC power source outlet does not have a power switch, gently pull out the power cord plug connected to the power source outlet.
  4. Remove the power source cable from the power supply faceplate. Remove the power cord from the power supply faceplate by gently pulling out the socket end of the power cord connected to the power supply faceplate.
  5. Slide the ejector lever toward the handle until you can no longer slide it (see Figure 1)
    Figure 1: Remove an AC PSM from the ACX7332 Router
  6. Grasp the PSM handle and pull firmly to slide the PSM halfway out of the chassis.
  7. Place one hand under the PSM to support it and slide it completely out of the chassis. Take care not to touch power supply components, pins, leads, or solder connections.
  8. Place the PSM in the antistatic bag or on the antistatic mat placed on a flat, stable surface.

Install an ACX7332 AC Power Supply Module

Before you install a PSM in a router, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

To install an AC PSM in an ACX7332 router:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to the ESD point on the chassis.
  2. Taking care not to touch power supply components, pins, leads, or solder connections, remove the PSM from its bag.
  3. Using both hands, place the PSM in the power supply slot on the front panel of the router and slide it in until it is fully seated and the ejector lever slides into place (see Figure 2).
    Figure 2: Install an AC PSM in an ACX7332 Router
  4. Attach the power cord to the PSM (see Figure 3).
    Figure 3: Install an AC Power Cord on an ACX7332 Router Install an AC Power Cord on an ACX7332 Router
  5. Attach the power cord to the AC power source, and switch on the dedicated customer-site 2-pole circuit breaker.
    Note:

    Each PSM must be connected 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 16A and 250V or as required by local code.
  6. Observe the status LED on the power supply faceplate. If the PSM is correctly installed and functioning normally, the status LED lights green steadily.

Remove an ACX7332 DC Power Supply Module

Before you remove a power supply module (PSM), be aware of the following:

Note:

The minimum required number of PSMs must always be present in the router.
Warning:

Before performing DC power procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the two-pole 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.

To remove a DC PSM:

  1. Switch off the dedicated customer-site two-pole circuit breaker for the PSM being removed. Follow your site's procedures for preventing ESD damage.
  2. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process.
  3. Verify that the LED on the PSM is unlit.
  4. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to the ESD point on the chassis.
  5. Remove the terminal block cover protecting the terminals on the faceplate.
  6. Using a Phillips screwdriver, remove the nuts from the DC power terminals
    Figure 4: Removing the Nuts from the Terminals Removing the Nuts from the Terminals
  7. Remove the cable lugs from the terminals.
  8. Carefully move the power cables out of the way.
  9. Press the ejector lever located on the DC PSM, to release it from the chassis.
  10. Pull the PSM straight out of the chassis.
  11. Place the PSM in the antistatic bag or on the antistatic mat placed on a flat, stable surface.

Install an ACX7332 DC Power Supply Module

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.

To install a DC PSM:

  1. 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. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to the ESD point on the chassis.
  3. Using both hands, slide the DC PSM straight into the slot on the front panel of the chassis until the PSM is fully seated in the slot.
  4. Connect to power.
    1. Remove the terminal block cover protecting the terminals on the faceplate.
      Figure 5: Removing the Terminal Block Cover Removing the Terminal Block Cover
    2. Remove the nuts from the terminals.
      Figure 6: Removing the Nuts from the Terminals Removing the Nuts from the Terminals
    3. 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. Do not overtighten the nuts. (Use a socket nutdriver.)

      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.
    4. Replace the terminal block cover over the terminals on the faceplate.
      Figure 7: Connecting the DC Cable Connecting the DC Cable
  5. Verify that the power cabling is correct, that the cables do not touch or block access to router components, and that the cables do not drape where people could trip over them.
  6. Attach the power cable to the DC power source. Then switch on the dedicated customer-site two-pole circuit breaker.
    Note:

    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 63A and 80V, or as required by local electrical code.
  7. Observe the LED on the power supply faceplate. If the PSM is installed correctly and is functioning normally, the LED lights green steadily.