TE250XN

TE250XN Appliances have a redundant power supply unit (PSU) and support DC PSUs.

If necessary, you can replace a PSU. Note that all PSUs on an appliance must be of the same type (DC).

Warning:

  • To protect yourself and the appliance PSUs from electrostatic discharge, make sure that you are electromagnetically grounded before you install, uninstall, or replace a PSU.

  • We recommend that you use an ESD grounding wrist strap. Connect the grounding plug on the wrist strap to the appliance grounding point.

Warning - All work related to the DC power must be performed by trained and certified service personnel only.

Legend

Item

Description

1

DC Power Supply Units

2

Alarm reset button

3

Grounding lug

Removing a DC Power Supply Unit

Legend

Item

Description

1

DC power connector

2

Terminal for - 48V DC wire

3

Terminal for 0V battery return wire

4

Release lever

5

Extraction handle

6

Power LED

7

Grounding lug

To remove a DC Power Supply Unit:

  1. Turn off the circuit breaker that supplies power to the DC Power Supply Unit.

    Make sure that the power supply LED is not lit up.

  2. On the DC power connector, loosen the screws to these wires:

    • 0V battery return

    • - 48V DC

  3. Remove the wires from the DC Power Supply Unit.

  4. Loosen the grounding lug screw and remove the wire from the ground connection.

  5. While holding the release lever and pushing it to the right, pull the extraction handle to remove the DC Power Supply Unit.

Note - To prevent damaging the power supply, use only the extraction handle to remove the DC Power Supply Unit

Installing a Replacement DC Power Supply Unit

Important - To protect the appliance and the DC Power Supply Units from damage, make sure that you connect the wires to the DC power connector terminals correctly.

To install a replacement DC power supply:

  1. Insert the DC PSU into its slot and push until it clicks into place.

  2. Connect the ground wire to the grounding lug.

  3. Connect the 0V battery return wire to the 0V terminal on the DC power connector.

  4. Tighten the 0V screw on the DC power connector.

  5. Connect the - 48V battery return wire to the - 48V terminal on the DC power connector.

  6. Tighten the - 48V screw on the DC power connector.

  7. Turn on the circuit breaker that supplies power to the DC PSU.

  8. If the alarm sounds, press the red Alarm Off button to the right of the DC PSUs.

  9. Make sure that the green power supply LED on the DC PSU is illuminated.