Replacing a power supply
Use these instructions to install a power supply in the Flex System Enterprise Chassis. You can install a power supply while the Flex System Enterprise Chassis is powered on.
To avoid a shock hazard:
- Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.
- Connect all power cords to a properly wired and grounded power source.
- Connect to properly wired power sources any equipment that will be attached to this product.
- When possible, use one hand only to connect or disconnect signal cables.
- Never turn on any equipment when there is evidence of fire, water, or structural damage.
- Disconnect the attached ac power cords, dc power sources, network connections, telecommunications systems, and serial cables before you open the device covers, unless you are instructed otherwise in the installation and configuration procedures.
- Connect and disconnect cables as described in the following table when you install, move, or open covers on this product or attached devices.
- This equipment must be installed by trained service personnel in a restricted-access location, as defined by the NEC and IEC 60950-1, First Edition, The Standard for Safety of Information Technology Equipment.
- Connect the equipment to a properly grounded safety extra low voltage (SELV) source. A SELV source is a secondary circuit that is designed so that normal and single fault conditions do not cause the voltages to exceed a safe level (60 V direct current).
- Incorporate a readily available approved and rated disconnect device in the field wiring.
- See the specifications in the product documentation for the required circuit-breaker rating for branch circuit overcurrent protection.
- Use copper wire conductors only. See the specifications in the product documentation for the required wire size.
- See the specifications in the product documentation for the required torque values for the wiring-terminal screws.
|Listed 70 A
|See Note 1
|4 AWG with Listed lug which can accept M6 ground screws
|See Note 2
|Torque rating for ground screws
|4.0 - 4.8 Newton-meters (35.4 - 42.5 inch-pounds)
- Make sure to complete replacement of one unit before starting replacement of another unit.
- Do not mix different types of power supplies in the Flex System Enterprise Chassis.
- Each chassis must contain either all ac-powered supplies or all dc-powered supplies.
- For ac-powered chassis, do not mix 2100 W and 2500 W power supplies. Chassis powered by ac power should contain only power supplies of the same wattage.
- For dc-powered chassis, do not mix 240 to 380 V dc and -48 to -60 V dc power supplies. Chassis powered by dc power should contain only power supplies of the same input voltage.
- Make sure that the power cord is not connected to the power supply when you install the power supply in the chassis.
- Do not remove the plastic strain-relief ties from the rear of the power supply.
To install a power supply, complete the following steps.
- If you are adding a power supply, remove the filler from the power-supply bay in which you want to install the power supply (press the release tab, grasp the filler by the slot, and pull it out of the bay).
- Grasp the power-supply handle and slide the power supply into the bay until it locks in place.
- If you are installing a -48 to -60 V dc power supply, connect the earth ground cable to the power supply.
- Use a 10 mm nut driver to remove the hex nuts from the ground studs.
- Remove the lock washer and one of the flat washers from each ground stud.
- Push the ground lug onto the ground studs; then, place the flat washer, the lock washer, and the hex nut back on each ground stud.
- Use a 10 mm nut driver to tighten the hex nuts to 4.0 - 4.8 Newton-meters (35.4 - 42.5 inch-pounds).
- Connect the power cord to the power supply:
- Loosen the strain-relief ties that are attached to the power-supply handle, but do not remove them.
- Align the power cord with the power-supply handle; then, secure the cord to the handle with the strain-relief ties.
- Loop the power cord connector around and connect it to the power supply.
- Push the power cord back through the strain-relief ties to remove excess cable from the loop.