Honeywell MS-9600LSE Manual Do Utilizador

MS-9600LS Series Manual — P/N 52646:B2  2/12/2010

175

Power Supply Calculations

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‘Secondary’ refers to the control panel’s backup batteries

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All currents are given in amperes (A).  Table 5.2 shows how to convert milliamperes and 
microamperes to full amperes. 

Use Table 5.3 on page 176 to calculate current draws as follows:

1. Enter the quantity of devices in all three columns.
2. Enter the current draw where required.  Refer to the Device Compatibility Document for 

compatible devices and their current draw.

3. Calculate the current draws for each in all columns.
4. Sum the total current for each column.
5. Copy the totals from Column 2 and Column 3 to Table 5.4 on page 177.

Following are the types of current that can be entered into Table 5.3 on page 176:



Calculation Column 1 - The primary supply current load that the control panel must 
support during a non-fire alarm condition, with AC power applied. 



Calculation Column 2 - The primary supply current load that the control panel must 
support during a fire alarm condition, with AC power applied.



Calculation Column 3 - The standby current drawn from the batteries in a non-fire alarm 
condition during a loss of AC power.

Milliamperes (mA) to
amperes (A)

mA x 0.001

3 mA x 0.001 = 0.003A

Microamperes (µA) to
amperes (A)

µA x 0.000001

300 µA x 0.000001 = 0.0003 A