IBM 8265 Nways ATM Switch, Installation Manual

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Installing a DC Power Supply
This section describes how to prepare and install the -48 Volt DC power supply and power cord in your
8265.
CAUTION:
Only trained electrical service personnel must make connections and disconnections to the -48
Volt DC power source.
A circuit breaker (short-circuit protection) must be set up in the main power source. This circuit
must be grounded to a safety ground. For each power supply use one 20-A protection device to
protect the cabling of the -48 Volt DC power supply against short-circuits.
To comply with UL requirements, the -48 Volt DC Power Supply must only be installed in a
rack-mounted 8265 installed in an enclosed cabinet.
The -48 Volt Power Supply switch only shuts off the output side of the power supply.
Before You Begin
This section describes what you should know before you begin installing the -48 Volt DC Power Supply in
your 8265:
1. Verify that the power source is compatible with the voltage and tolerances specified on the input rating
plate located on the power supply unit. The nominal value is -48 Volt DC, 11 Amps.
2. Remove the following items from the shipping box:
Ÿ
Power supply unit
Ÿ
Power input cable
Ÿ
Bags containing the terminal rings.
The -48 Volt DC power supply ships with 3 bags of terminal rings:
– Part Number AMP 320563, contains 1 terminal ring for only the green/yellow ground wire.
– Part Number AMP 31890, contains 4 terminal rings for the red and black wires.
– Part Number AMP 31880, contains 4 terminal rings for the red and black wires.
The -48 Volt DC power supply ships with different size terminal rings. One terminal ring is for only the
green/yellow ground wire. The remaining terminal rings are used with the red and black wires. Choose
the correct the terminal rings to support your installation.
The AMP part number for the terminal crimping tool is AMP # 58433-2 (this includes the correct
crimping die set). The AMP Die Set part number is 58423-1 (for people that already have the crimping
tool with other dies).
Chapter 4. Installing Power Supplies
21