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S12700 and S12700E Series Agile Switches Hardware Installation and Component Replacement

This document describes hardware installation procedures of the S12700 series switches, troubleshooting methods for common hardware faults, and switch maintenance instructions.
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Replacing a Power Module

Replacing a Power Module


  • Before replacing a power module, turn off the power switch on the power module, and then turn off the corresponding circuit breaker in the power distribution cabinet to power off the power module.

  • Be careful of the heat on a power module when replacing it.

  • When removing a power module, do not touch the operating power modules with your body or any tools to avoid electric shocks or short circuits.

To replace the power modules in a running switch, take the following measures to avoid impact of the replacement on the running services:

  • If there are empty power slots in the switch, install a new power module in an empty slot first. Remove the power module to be replaced after the new power module starts to work normally. Then replace other power modules one by one.
  • If all the power slots in the switch are occupied, determine whether replacing a power module will affect the running services. It is recommended that you replace the power modules one by one, and replace the next one when the new power module works normally.


  • ESD wrist strap or ESD gloves

  • Phillips screwdriver


  1. Find the power module that needs to be replaced.

    Before replacing a power module, determine in which cabinet and chassis the power module is installed, find the power module in the chassis, and attach a label on the panel of the power module to avoid misoperation.

  2. Turn the power switch on the power module to the OFF position, and then turn off the corresponding circuit breaker in the power distribution cabinet to power off the power module.
  3. Wear an ESD wrist strap or a pair of ESD gloves. When wearing an ESD wrist strap, insert the other end to the ESD jack of a device and ensure that the device is reliably grounded.
  4. Remove the power cable from the power module to be replaced.

    Perform the following step to remove the AC power cable from an AC power module.

    Release the locking strap or locking latch on the AC power module, and then remove the AC power cable. See Figure 13-1.

    Figure 13-1 Removing an AC power cable

    Perform the following steps to remove the DC power cables from a DC power module.

    Pinch the springs on both side of the power cable connector, gently push the power cable connector, and then pull the power cables out. See Figure 13-2.
    Figure 13-2 Removing a DC power cable

  5. Remove the power module.
    1. Press the release button on the ejector level of a 2200 W power module or loosen the captive screw on the ejector level of an 800 W power module by rotating a Phillips screwdriver counterclockwise. See callout 1 in Figure 13-3.
    2. Raise the ejector lever to release the power module from the backplane. See callout 2 in Figure 13-3.
    3. Slowly pull out the power module with one hand and hold the power module with the other hand. See callout 3 in Figure 13-3.

      Figure 13-3 Removing a power module from a switch

  6. Insert the new power module into the power module slot.

    The two types of power modules are installed in different ways, as shown in a and b of Figure 13-4.

    1. Hold the new power module with one hand on the front panel and the other hand under the bottom. Slowly push the power module along the guide rails in the slot, until the power module is completely attached to the backplane. See callout 1 in Figure 13-4.
    2. Lower the ejector lever until it is securely attached to the power module. See callout 2 in Figure 13-4.
    3. (Only for a power module secured with a captive screw) Rotate the Phillips screwdriver clockwise to tighten the captive screw on the ejector lever. See callout 3 in Figure 13-4.

      Figure 13-4 Installing a power module

  7. Connect power cables according to Connecting DC Power Cables or Connecting AC Power Cables.
  8. Turn on the corresponding circuit breaker in the power distribution cabinet to power on the new power module.
  9. Verify the functions of the new power module.

    Turn on the new power module and check whether the power module functions normally.

    • Observe the INPUT or RUN status indicator on the power module. If the indicator is steady green, the power module is working normally. If the indicator turns red, the power module does not work normally.

    • Run the display device command to check the running status of the power module.

    If the new power module does not work normally, contact the equipment supplier for technical support.

Follow-up Procedure

After replacing the power module, collect all tools. If the old power module is faulty, fill in the Repair Transmission Sheet and send the faulty module with the Repair Transmission Sheet to the equipment supplier or the specified repair service provider.

Updated: 2019-09-29

Document ID: EDOC1000069460

Views: 39281

Downloads: 887

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