XR500/XR500N Installation Guide
Digital Monitoring Products
9
INSTALLATION
Secondary Power Supply
6.1 Battery Terminals 3 and 4
Connect the black battery lead to the negative battery terminal. The negative terminal connects to the enclosure
ground internally through the XR500/XR500N circuit board. Connect the red battery lead to the positive terminal of
the battery. Observe polarity when connecting the battery.
You can add a second battery in parallel using the DMP Model 318 Dual Battery Harness.
For UL installations, all batteries shall be installed in a DMP Model 350 enclosure and all wiring shall run
through conduit. The enclosure shall be installed to the left of the XR500/XR500N enclosure to ensure Battery
and AC wire separation.
Use sealed lead-acid batteries only:
Use the DMP Model 365 (12 VDC 9 Ah), DMP Model 367 (12 VDC
7.7 Ah), Model 366 (12 VDC 18 Ah), Model 368 (12 VDC 4.5 Ah), or Model 369 (12 VDC 7 Ah) sealed lead-
acid rechargeable battery. Batteries supplied by DMP have been tested to ensure proper charging with
DMP products.
GEL CELL BATTERIES CANNOT BE USED WITH THE XR500/XR500N PANEL.
6.2 Earth
Ground
To provide proper transient suppression, XR500/XR500N panel terminal 4 must be connected to earth ground using
14 gauge or larger wire. DMP recommends connecting to a cold water pipe, ground rod, or building ground only. Do
not connect to an electrical ground or conduit, sprinkler or gas pipes, or to a telephone company ground.
6.3 Battery Only Restart
When powering up the XR500/XR500N panel without AC power, brie
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y 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 XR500/XR500N panel is powered up with an AC transformer, the battery cutoff relay
is pulled in automatically. For more information refer to Figure 2.
6.4 Battery Replacement Period
DMP recommends replacing the battery every 3 to 5 years under normal use.
6.5 Discharge/Recharge
The XR500/XR500N battery charging circuit
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oat charges at 13.9 VDC at a maximum current of 1.0 Amps using a
50 VA or 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
6.6 Battery
Supervision
The XR500/XR500N tests the battery when AC power is present. The test is done every three minutes and lasts for
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ve 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 will not be detected until the next two minute test is completed.
6.7 Battery
Cutoff
The panel disconnects the battery any time the battery voltage drops below 10.2 VDC. This prevents battery deep
discharge damage.
6.8 XR500/XR500N Power Requirements
During AC power failure, the XR500/XR500N panel and all auxiliary devices connected to the XR500/XR500N 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 XR500/XR500N panel power requirements. You must add the
additional current draw of 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.
