DMP Electronics XR2500F - Manual (Page 24)

Digital Monitoring Products XR2500F Installation Guide
16
InstallatIon
Battery Information
11.1 Battery Only Restart
When powering up the XR2500F panel without AC power, briefly short across the battery start pads 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 XR2500F panel is powered up with an AC transformer, the battery
cutoff relay is pulled in automatically. For battery start pad location refer to Figure 11.
11.2 Battery Replacement Period
DMP recommends replacing the battery every 3 to 5 years under normal use.
11.3 Discharge/Recharge
The XR2500F battery charging circuit float charges at 13.9 VDC at a maximum current of 1.0 Amps using a
56 VA transformer. Listed below are the various battery voltage level conditions:
Battery Trouble:
Below 11.9 VDC
Battery Cutoff: Below 10.2 VDC
Battery Restored: Above 12.6 VDC
11.4 Battery Supervision
The XR2500F tests the battery when AC power is present. The test is done every three minutes and lasts for
five seconds. During the test, the panel places a load on the battery; if the battery 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 repeats every two minutes until the battery
charges above 12.6 VDC indicating the battery has restored voltage. If a weak battery is replaced with a
fully charged battery, the restored battery is not detected until the next two minute test completes.
11.5 Battery Cutoff
The panel disconnects the battery any time the battery voltage drops below 10.2 VDC. This prevents battery
deep discharge damage.
12.6 XR2500F Power Requirements
During AC power failure, the XR2500F panel and all auxiliary devices connected to the XR2500F 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 XR2500F panel power requirements.
• XR2500F Command Processor™ Panel
• The Fire Command Center
• 893A Dual Phone Line Module
• Two 866 NAC modules
• 481 Zone Expansion Interface Card
Then add the additional current draw of Remote Fire Command Centers, Security Command keypads, zone
expansion modules, 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 calculate the total
ampere-hours required.
See the XR2500F Standby Battery Power Calculations chart on the following page and the Standby Battery
Selection information on the next page.