Digital Monitoring Products
XR150/XR550 Series Canadian 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 XR150/XR550 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 6.
Use sealed lead-acid batteries only:
Use
the Model 365 (12VDC 9 Ah), Model 366
(12VDC 18 Ah), Model 368 (12VDC 5.0 Ah),
or Model 369 (12VDC 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
XR150/XR550 SERIES PANEL.
6.2
Earth Ground (GND)
To provide proper transient suppression, XR150/XR550 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 XR150/XR550 Series 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 XR150/XR550 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 XR150/XR550 Series battery charging circuit float charges at 13.8VDC at a maximum current of 1.0 Amps. Listed
below are the various battery voltage level conditions:
Battery Trouble: Below 11.9VDC
Battery Cutoff:
Below 10.2VDC
Battery Restored: Above 12.6VDC
6.6
Battery Supervision
The XR150/XR550 Series 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 11.9VDC
a low battery is detected. If AC power is not present, a low battery is detected any time the battery voltage falls
below 11.9VDC.
If a low battery is detected with AC power present, the test repeats every two minutes until the battery charges
above 12.6VDC 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 10.2VDC. This prevents battery deep
discharge damage.
AC
1
2
3
4
+B
AC
–B
Battery
Start
318 Battery
Harness
Panel Red and
Black Battery Cables
Red
Black
Battery
Battery
Battery
318 Battery
Harness
Red
Black
5
6
BELL GND
To AC
14 AWG to
Earth Ground
XR550
Panel
PTC
PTC
To Bell
Circuit
Figure 6: Wiring Multiple Batteries
