Quick Installation Guide for SmartEdge 400 AC Power Tray
220-0378-R7A
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© Ericsson AB 2010. All rights reserved. No part of this document may be reproduced in any form without the written permission of the copyright owner.

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The contents of this document are subject to revision without notice due to continued progress in methodology, design and manufacturing. Ericsson shall have no liability for any error or damage of any kind resulting from the use of this document.

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SmartEdge is a registered trademark of Telefonaktiebolaget LM Ericsson.

1   Installing the AC Power Tray

Figure 1   AC Power Tray

Table 1    Order Numbers

BMG907057/1

Two-slot, one rack unit (RU) AC power tray, with two AC power tray jumper cables and mounting brackets

BMK90577/1

800 Watt AC power supply unit with AC power cord

The AC power tray provides slots for two AC power supplies and allows a SmartEdge® 400 router to be installed at a site for which DC power sources are not available. Depending on your order, the power supplies might be installed in the tray. The AC power supplies connect to the SmartEdge 400 chassis with a pair of AC power tray jumper cables, supplied with the AC power tray, using connectors on the rear of the AC power tray. Each power supply includes an AC power cord. Mounting brackets for 19- and 23-inch racks are also included with the AC power tray.

The following installation considerations apply to the AC power tray components:


 Warning! 
Risk of personal injury. There are mechanical and electrical shock hazards present throughout the system. Only qualified personnel are allowed to install and service the system and its components. Do not attempt to access any component inside the AC power tray; there are no user-serviceable components inside it.

The following procedure assumes that you are installing an AC power tray and its supplies for a SmartEdge 400 chassis that is already installed and running with DC power sources. If you are installing the AC power tray and its supplies as part of the installation of a new SmartEdge 400 chassis, see the procedure in SmartEdge 400 Router Hardware Guide.

The AC power tray requires one rack unit (RU) in a 19-inch or 23-inch rack. You must install it directly below the SmartEdge 400 chassis in the same mounting position, either flush or extended, as the chassis, which shows both units installed in the flush mounting position.

Perform the following steps:

  1. Install the mounting brackets:
    1. Position a mounting bracket against one side of the AC power tray, lining up two of the screw holes in the bracket with two of the screw holes in the side of the AC power tray. Make sure the bracket position corresponds to the position of the chassis mounting brackets.
    2. Using a Phillips screwdriver, secure the bracket to the AC power tray with two of the 10-32 x 0.25-inch screws provided with the brackets; tighten each screw to a maximum torque of 15.0 inch-lbs (1.7 Newton-meters).
    3. Repeat steps a and b to install the second bracket on the other side of the AC power tray.
  2. Install an AC power supply in an AC power tray:
    1. Insert the AC power supply into one of the slots in the AC power tray until the captive bolt can engage the AC power tray.

    2. With a 3/16-inch Allen wrench, tighten the bolt to a maximum torque of 25.0 inch-lbs (2.8 Newton-meters); as you screw the bolt, the AC power supply moves into the AC power tray.
    3. If you are installing a second power supply for a redundantly powered SmartEdge 400 chassis, use the Allen wrench to remove the blank panel from the other slot and install the second power supply in it (repeat steps a and b).
  1. Install the AC power tray in the rack:
    1. Put on an antistatic wrist strap, and attach it to an appropriate grounded surface.

      Do not attach the wrist strap to a painted surface; there is an electrostatic discharge (ESD) convenience jack located on the rear of the chassis.

    2. Position the AC power tray directly below the SmartEdge 400 chassis so that the screw holes in the AC power tray mounting brackets are aligned with the screw holes in the rack just below the chassis; see Figure 1.
    3. Using the Phillips screwdriver, secure the AC power tray to the rack or extension hardware with four 12-24 or equivalent screws; tighten each screw to a maximum torque of 30.0 inch-lbs (3.4 Newton-meters).
  2. Connect the ground cable to the AC power tray:
    1. Using a crimping tool, attach a two-hole lug to one end of the ground cable for the AC power tray.
    2. Place the connector over the studs on the back panel of the AC power tray.
    3. Secure the connection with a pair of lug nuts; with a 7/16-inch torque wrench, tighten the lug nuts to a maximum torque of 15.0 inch-lbs (1.7 Newton-meters).
    4. Connect the other end of the cable to an appropriate ground point.

       Warning! 
      Risk of electrical shock. Do not disconnect the power cables to the chassis until you have first deenergized the DC power supplies, and then removed the fuses for both the A- and B-side power sources in the fuse panel. With the power cables connected to the chassis and the fuse panel, the system is fully powered on, and you can incur electrical shock when you remove the cables from the chassis connectors.
  1. If it is not already shut down, power off the SmartEdge 400 router and disconnect the DC power cables:
    1. De-energize the DC power supplies, remove the fuses for both the A- and B-side power sources in the fuse panel, and then disconnect the power cables to the chassis.
    2. Remove the DC jumper connector blocks from the connectors labeled “DC Input A” and “DC Input B” on the rear of the chassis.

       Caution! 
      Risk of equipment damage. Always install the ground cables first and secure them with lugs before installing the C-bracket. Effective grounding of the chassis or AC power tray depends on the ground cable connector being in full contact with the chassis or AC power tray.
  2. If the chassis and AC power tray are installed in a 23-inch rack, install the C-bracket:

    1. Place the bracket over the lugs on the studs on the chassis and AC power tray back panels with the open end of the bracket on the right; slide it over the studs until it is in full contact with the lugs on both back panels.
    2. Secure the connection with a pair of lug nuts on each back panel; with the torque wrench, tighten the lug nuts to a maximum torque of 15.0 inch-lbs (1.7 Newton-meters).
  3. Connect the AC power tray to the chassis:

    1. Insert one end of an AC power tray jumper cable in each of the connectors labeled “DC Input A” and “DC Input B”. The plugs are keyed so that you cannot install them incorrectly; install each plug with the notched side down. Install both cables, even if the AC power tray contains a single power supply.
    2. Insert the plug at the other end of each cable in the appropriate AC power tray connector, labeled “48V_A Output” and “48V_B Output”, respectively.
  1. Insert the AC power cord for the supply in the connector for that supply on the rear of the AC power tray and pull down the retention clip to secure the plug. (Match the label by the power cord connector with the label by the power supply slot.) If the tray includes dual power supplies, repeat this step for the second AC power cord.
  2. Power on the SmartEdge 400 router: connect the AC power cords to separate building outlets, each of which must be for a circuit rated at 15A with a 15A circuit breaker.
  3. Check the status LEDs located on the alarm card at the front of the chassis and the AC input power and DC output power LEDs on the front of each installed power supply; for more information about LEDs, see SmartEdge 400 Router Hardware Guide.

If you encounter problems installing the AC power tray, consult your local technical support representative.

For information about SmartEdge hardware and software, see related documentation at https://ebusiness.ericsson.net.