Optional Battery Backup

Introduction 

Caution: Use care when lifting the batteries. Each battery weighs approximately 33 lbs (15 kg).

This section provides information relative to and procedures for installing an optional battery backup shelf, with batteries, to provide backup power to the Tellabs 1150 MDS5 or MDS7 equipment shelf.

One battery backup shelf is required for each Tellabs 1150 shelf and associated fan shelf(ves). The battery backup shelf provides backup power in the event of an AC power failure to the equipment rack. Depending on the services being provided by the Tellabs 1150 shelf, the battery backup shelf can provide from 25 minutes to one hour of power.

Installation

Note 1: The optional battery backup shelf is designed to support one MDS shelf, MDS5 or MDS7. If multiple shelves are to be supported, additional battery backup shelves must be installed.

Note 2: If installing the battery backup shelf in a 23-Inch Rack, additional mounting bracket extensions are required.

Refer to Figure 3 for a typical Tellabs 1150 (MDS5) installation. Use the following procedure to install the optional battery backup shelf:

1. Determine the location for the battery backup shelf.

   Note: The shelf must be installed within 13 ft (4 m), dressed cable length, of the DC Rectifier.

2. Insert the shelf in the chosen location and, using the mounting screws provided, mount the shelf to the rack.

   Note 1: If mounting the shelf in a 23-inch equipment rack, extension mounting brackets are required.

   Note 2: It is recommended that the shelf be mounted in the same rack as the DC Rectifier and Tellabs® equipment shelf being supported, and that it be mounted in the lower area of the rack due to the weight of the batteries (33 lbs (15 kg)).

3. Locate the four batteries.
4. Unpack and inspect the batteries for any damage.
    

   Warning:  Make sure that the batteries have not been damaged by rough handling. If the unit has been damaged, there is a possibility of a loss of a small amount of sulfuric acid electrolyte and possible corrosion of adjacent components.

5. Install the batteries, as shown below, in the shelf. Install the right-most battery first. Leave approximately 1/2 in () space between batteries.
   
   
    

6. Locate the four battery jumper cables.
7. Apply NO-OX protectorant to the battery terminals and the terminal lugs on the battery jumper cables.
8. Using the hardware provided with the batteries, flat washers, split-ring washers, and #10-32 hex bolts, assemble the three battery jumper cables as shown in the following illustration.
    

   Caution: Do not connect the battery cables to the batteries until instructed to do so.

   
   
   

9. Locate the 13 ft (4 m) 10AWG black and red DC power cables.
10. At the DC Rectifier, remove the rear cover on the left side, when viewed from the rear.
    
    
    
     

12. Replace and secure the rear cover of the DC Rectifier shelf.
13. Dress the battery power cables down the rear of the right side rack rail, as viewed from the front, using tie-wraps or lacing twin to secure the cables to the rail.
14. Apply NO-OX protectorant to the battery terminals and the terminal lugs on the power cables.
15. At the battery tray, connect the Red and Black cables as shown in the illustration accompanying Step 8, using the flat washers, split-ring washers, and #10-32 hex nuts provided.
16. Tie-wrap the cables to the battery backup tray as needed to secure the cables.
17. At the DC Rectifier, open the right-most section on the front of the rectifier.
18. In the spare parts, locate the 40A circuit breaker.
19. Ensure the circuit breaker is in the OFF position.
20. Insert the circuit breaker into the position the power cables were connected to in Step 11.
21. Set the circuit breaker to the ON position.

Before testing the battery backup, it is recommended to fully charge the batteries.

When the batteries have a full charge, approximately 24 hours, to test the battery backup, turn the AC circuit breaker powering the DC Rectifier to the OFF position. Observe that the MDS shelf and associated fan trays remain powered.

Battery Operating Conditions & Cautions

Observe the following operational conditions and cautions when handling the batteries:

• Battery contains toxic material (lead) and corrosive fluid (sulfuric acid)
• Charging can produce explosive gases
• Do not charge in gas tight enclosures
• Charge battery in a well-ventilated area away from sparks, flames or smoking
• Use approved voltage controlled charger
• Do not short-circuit battery terminals, as this can cause an explosion or fire
• Keep batteries and chargers away from children
• Charge battery as soon as possible after use
• Do not store battery in discharged state
• Do not puncture, disassemble, mutilate or incinerate
• MUST BE RECYCLED OR DISPOSED OF PROPERLY

Installation Care

When placing the battery into service it must be inspected to make sure that the battery has not been damaged by rough handling. If the unit has been damaged, there is a possibility of a loss of a small amount of sulfuric acid electrolyte and possible corrosion of adjacent components. Any sulfuric acid can cause severe burns to the skin and eyes. If contact is made with a damaged battery, immediately wash the contacted area with water for at least 5 minutes.

When installing the battery in equipment, ventilation must be provided. Toward the end of charge and under overcharge conditions, hydrogen and oxygen gas can be generated. If this gas is allowed to accumulate in the enclosure and a spark is introduced, an explosion could result.

Battery Specifications