
SYSTEM RACK
The system rack is a framework for modules that consists of up to
4.4.1 POWER CONSUMPTION
The following tables shows the average voltage, current and power for each supply voltage per card (based on loading of 96 cards).
TablePOWER
Voltage | Current | Power |
|
|
|
+5V DC | 0.50A | 2.50W |
+12V DC | 0.10A | 1.20W |
0.05A | 0.60W | |
0.03A* | 1.44W | |
|
|
|
| Total | 5.74W |
|
|
|
* DIDs only.
Total watts including
Total Watts x No. of Modules = Terminal Power
The wattage required by the power supply is found by dividing the total wattage of the terminal by the efficiency of the power supply (0.7).
Terminal Power ⎟ 0.7 = Wattage of Power Supply
The BTUs per hour are found by multiplying a known value (3.6) by the wattage required by the power supply.
3.6x Wattage of Power Supply = Btu/Hr.
EXAMPLE:
4.3W x 96 = 413W
413W ⎟ 0.7 = 590W
3.6x 590W = 2,123 Btu/Hr
4.4.2EQUIPMENT REQUIRED
•Digital Multimeter, voltmeter resolution to 0.001V.
•Transmission test set, HP 3551A.
•IBM NT compatible computer, with NetSMM Call Processing Software.
•Two CIMs
4.4.3VERIFY RESISTANCE OF BUS BAR AND POWER SUPPLY LINES
1.Verify the Power Cables are not connected to a power source.
2.Verify the Power Supplies are not installed in the Power Supply shelf.
3.Measure the resistance from
Ohm Meter Lead Positions | Resistance in | ||
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| |
From | To |
| |
| Ohms | ||
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| |
Bus Bar | Chassis/Frame | Infinite | |
Bus Bar | Black | 0 | |
Bus Bar | Red | Infinite | |
Bus Bar | D1 | Blue | Infinite |
Bus Bar | E1 | White | Infinite |
Bus Bar | F1 | Green | Infinite |
D1 | Blue | Infinite | |
E1 | White | Infinite | |
F1 | Green | Infinite |