2: How To Use Table 5.3 On Page 176 To Calculate System Current Draw - Honeywell FIre-LITe ALArms MS-9600LS Manual

Calculating the System Current Draw
• 'Secondary' refers to the control panel's backup batteries
• All currents are given in amperes (A). Table 5.2 shows how to convert milliamperes and
microamperes to full amperes.
Milliamperes (mA) to
amperes (A)
Microamperes (µA) to
amperes (A)
5.3.2 How to Use Table 5.3 on page 176 to Calculate System
Current Draw
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.
MS-9600LS Series Manual — P/N 52646:B2 2/12/2010
To convert...
Table 5.2 Converting to Full Amperes
Multiply
mA x 0.001 3 mA x 0.001 = 0.003A
µA x 0.000001 300 µA x 0.000001 = 0.0003 A
Power Supply Calculations
Example
175