Installation
20
XR2400F Installation Guide
Digital Monitoring Products www.dmpnet.com 2500 N. Partnership Boulevard Springfield, MO 65803
Battery Information
16.1 Battery only restart
When powering up the XR2400F panel without AC power, it is necessary to short across the CR7 leads to pull in
the battery cutoff relay. The leads need a momentary short only. Once the relay has pulled in, the battery
voltage holds it in that condition. If the XR2400F panel is powered up with an AC transformer, the battery cutoff
relay is pulled in automatically.
16.2 Replacement period
DMP recommends the battery be replaced every 3 to 5 years under normal use.
16.3 Discharge/recharge
The XR2400F battery charging circuit float charges at 13.9 VDC at a maximum current of 1.2 Amps using a
40VA transformer. The total current available is reduced by the combined auxiliary current draw from terminals
5, 6, and 24. The various battery voltage level conditions are listed below:
Battery Trouble: Below 11.9 VDC
Battery Cutoff: Below 10.2 VDC
Battery Restored: Above 12.6 VDC
16.4 Battery supervision
The XR2400F tests the battery when AC power is present. The test is done every 3 minutes and lasts for five
seconds. During the test, the panel places a load on the battery and if its voltage falls below 11.9 VDC a low
battery is detected. If AC power is not present, a low battery is detected any time the battery voltage falls below
11.9 VDC.
If a low battery is detected with AC power present, the test is repeated every two minutes until the battery
charges above 12.6 VDC; the battery restored voltage. If a weak battery is replaced with a fully charged battery,
the restored battery will not be detected until the next two minute test is done.
16.5 Battery cutoff
The panel disconnects the battery any time the voltage of the battery drops below 10.2 VDC. This prevents deep
discharge damage to the battery.
16.6 XR2400F power requirements
During AC power failure, the XR2400F panel and all auxiliary devices connected to the XR2400F draw their
power from the battery. All devices must be taken into consideration when calculating the battery standby
capacity. On the following page is a list of the power requirements of the XR2400F panel. First add the current
draw of the devices included in the XR2400F FACP:
• XR2400F Command Processor™ Panel
• The Fire Command Center
• 893A
• Two 866 NAC modules
• The 462N Card
Then add the additional current draw of Remote Fire Command Centers, zone expanders, smoke detector
output, and any other auxiliary devices used in the system for the total current required. The total is then
multiplied by the number of standby hours required to arrive at the total ampere/hours required.
See the Panel Standby Battery Power Calculations chart on the following page.
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