DMP Electronics LT-0229 (5 97) User Manual
Page 6
Installation
2841 E. Industrial Drive Springfield, MO 65802-6310 800-641-4282
XR10/XR20 Installation Guide
6.4
Discharge/recharge
The XR10/XR20 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
7, 11, and 25. The various battery voltage levels are listed below:
40VA transformer. The total current available is reduced by the combined auxiliary current draw from terminals
7, 11, and 25. The various battery voltage levels are listed below:
Battery Trouble:
Below 11.9 VDC
Battery Restored:
Above 12.6 VDC
6.5
Battery supervision
The XR10/XR20 tests the battery once every hour when AC power is present. The test lasts for five seconds. A
load is placed on the battery and if its voltage falls below 11.9 VDC a low battery is detected. If AC power has
failed, a low battery is detected any time the battery voltage falls below 11.9 VDC.
load is placed on the battery and if its voltage falls below 11.9 VDC a low battery is detected. If AC power has
failed, 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 faulty battery is replaced with a fully charged battery,
the restored battery will not be detected until the next two minute test is done.
charges above 12.6 VDC; the battery restored voltage. If a faulty battery is replaced with a fully charged battery,
the restored battery will not be detected until the next two minute test is done.
6.6
XR10/XR20 power requirements
During AC power failure, the XR10/XR20 panel and all auxiliary devices connected to the XR10/XR20 draw their
power from the battery. All devices must be taken into consideration when calculating the battery standby
capacity. Below is a list of the power requirements of the XR10/XR20 panel. Add the additional current draw of
Security Command keypads, smoke detector output, and any other auxiliary devices used in the system for the
total current required. The total is then multiplied by the total number of standby hours required to arrive at the
total ampere/hours required.
power from the battery. All devices must be taken into consideration when calculating the battery standby
capacity. Below is a list of the power requirements of the XR10/XR20 panel. Add the additional current draw of
Security Command keypads, smoke detector output, and any other auxiliary devices used in the system for the
total current required. The total is then multiplied by the total number of standby hours required to arrive at the
total ampere/hours required.
XR10/XR20 STANDBY BATTERY POWER CALCULATIONS
Standby Current
Alarm Current
XR10/XR20 Command Processor Panel
50mA ______ mA
50mA ______ mA
Active Zones 1-9
Qty _____ x
1.6mA ______ mA Qty _____ x
*2mA ______ mA
Active Zone 10
4mA ______ mA
30mA ______ mA
2-Wire Smokes
Qty _____ x
.1mA ______ mA Qty _____ x
.1mA ______ mA
Bell Output
1500mA max. ______ mA
670, 770, and 771 Keypads
Qty _____ x
125mA ______ mA Qty _____ x 125mA ______ mA
Annunciator (ON)
Qty _____ x
20mA ______ mA
690, 693, 790, 791, and 793 Keypads
Qty _____ x
100mA ______ mA Qty _____ x 100mA ______ mA
Annunciator (ON)
Qty _____ x
20mA ______ mA
692 Keypads
Qty _____ x
30mA ______ mA Qty _____ x
30mA ______ mA
Annunciator (ON)
Qty _____ x
10mA ______ mA
Auxiliary Powered Devices on
Terminals 7 and 11
Terminals 7 and 11
______ mA
______ mA
(Other than keypads)
Total Standby ___________ mA
Total Alarm ____________ mA
Total Standby ____________ mA x number of standby hours needed ______ = ___________ mA/hours
Total Alarm + ___________ mA/hours
Total
___________ mA/hours
x _.001_____
= ___________ A/hours required
* Based on 10% of active zones
in alarm condition
in alarm condition