Kentec Electronics Sigma A-CP, Инструкция по установке и эксплуатации

Страница: 100 / 107

Current limits are provided in Appendix A, “Specifications” for each circuit of the Sigma A-CP Fire
Control Panel. Installers must identify the current-draw of each device and then compare the sum of
these device currents to the current limit provided for each circuit-output. The total device-current
must be below the limits provided for each circuit output specified in Appendix A, “Specifications”.
The calculation of total-current-loading during an alarm condition includes the sum of device-loads on
each power output circuit of the Sigma A-CP Fire Control Panel. Power circuits of the fire control panel
are provided on the terminals of NAC 1, NAC 2 and AUX 24V.
CAUTION!
NAC Wiring Length
Determine the maximum wire length that can safely operate Notification Appliances under worst case
conditions.
To determine the maximum wire length under worst case conditions:
1
Identify the minimum operating-voltage (V
Opmin
) of Notification Appliances on the NAC channel.
2
Calculate the maximum current of the circuit (I
max
).
3
Identify the wire-resistance-per-foot of the circuit (R
wire
).
4
Calculate the maximum wire length (L
max
) of the circuit.
Do not operate in standby while maintaining a 500 mA load on the AUX 24 V output of this fire
control panel. The fire control panel cannot provide 500 mA of current to the load of the AUX
24 V output during an AC failure condition and maintain continuous standby operation for
twenty-four hours followed by five minutes of alarm. Total standby-current of the 7 AH
batteries must draw less than 225 mA to maintain continuous standby operation for twenty-
four hours followed by five minutes of alarm. Total standby-current of the 12 AH batteries must
draw less than 400 mA to maintain continuous standby operation for twenty-four hours
followed by five minutes of alarm.
www.acornfiresecurity.com
www.acornfiresecurity.com