Installation guide

Digital Monitoring Products XR500 Series Installation Guide
10
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
Series circuit board. Connect the red battery lead to
the battery positive terminal. Observe polarity when
connecting the battery.
You can add a second battery in parallel using the
DMP Model 318 Dual Battery Harness. DMP requires
each battery be separated by a PTC in the battery
harness wiring to protect each battery from a
reversal or short within the circuit. See Figure 5.
For listed installations, all batteries shall be
installed in a DMP Model 350 or Model 352S
enclosure and all wiring shall run through conduit.
The enclosure shall be installed to the left of the XR500 Series 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SERIESPANEL.
6.2 Earth Ground (GND)
To provide proper transient suppression, XR500 Series 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SeriespanelwithoutACpower,brie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 Series panel is powered up with an AC transformer, the battery cutoff relay is
pulledinautomatically.FormoreinformationrefertoFigure1.
6.4 Battery Replacement Period
DMP recommends replacing the battery every 3 to 5 years under normal use.
6.5 Discharge/Recharge
TheXR500Seriesbatterychargingcircuit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SeriesteststhebatterywhenACpowerispresent.Thetestisdoneeverythreeminutesandlastsfor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.
AC
1234
+BAC –B
Battery
Start
318 Battery
Harness
Panel Red and
Black Battery Cables
Red
Black
Battery
Battery
Battery
318 Battery
Harness
Red
Black
56
BELL GND
To AC
14 AWG to
Earth Ground
Command
Processor
Panel
PTC
PTC
To Bell
Circuit
Figure 5: Wiring Multiple Batteries