
POWER SUPPLY
SECTION 22 POWER SUPPLYFigureThe Switch may be powered by different types of power e.g.:
•110V AC Single Phase
•230V AC Single Phase
A power supply may be removed and installed while power is applied to the Switch provided the Switch is equipped with a Redundant Supply.
See Section 4 for a wiring diagram of the power supplies.
22.2 POWER CONSUMPTIONThe 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 per hour
EXAMPLE:
4.3W x 72 = 310W
310W ⎟ 0.7 = 443W
3.6 x 443W = 1,595 Btu/Hr
The following tables shows the voltage, current and power for each supply voltage per card (based on loading of 72 cards).
Total watts including
The total wattage of the terminal is found by multiplying the wattage of a module by the number of modules.
Total Watts x No. of Modules = Terminal Power
Table | AVERAGE VOLTAGE/CURRENT/ | ||
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| POWER |
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Voltage |
| Current | Power |
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+5V DC |
| 0.50A | 2.50W |
+12V DC |
| 0.10A | 1.20W |
| 0.05A | 0.60W | |
| 0.03A* | 1.44W | |
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| Total | 5.74W |
* DIDs only. |
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