Digital Monitoring Products XR20 Installation Guide download pdf (Page 11)

Installation

XRSuper6/XR20/XR40 Installation Guide

2500 N. Partnership Boulevard Springfield, MO 65803 www.dmpnet.com Digital Monitoring Products

Secondary Power Supply

6.1 Battery terminals 3 and 4

Connect the black battery lead to terminal 4 on the panel and to the negative terminal of the battery. The

negative terminal connects to the enclosure ground internally through the panel circuit board. Connect the red

battery lead to terminal 3 on the panel and to the positive terminal of the battery. Observe polarity when

connecting the battery. The panel can charge up to two batteries.

Use sealed lead-acid batteries only: Use the DMP Model 367, 12 VDC 7.0Ah sealed lead-acid rechargeable

battery. Batteries supplied by DMP or manufactured by Eagle Picher or Yuasa have been tested to ensure proper

charging with DMP products.

GEL CELL BATTERIES CANNOT BE USED WITH THE XRSuper6/XR20/XR40 PANEL.

6.2 Earth ground

Terminal 4 of the panel must be connected to earth ground using 14 gauge or larger wire to provide proper

transient suppression. DMP recommends connecting to a metal cold water pipe or ground rod only. Do not

connect to electrical conduit or a telephone company ground.

6.3 Replacement period

DMP recommends the battery be replaced every 3 to 5 years under normal use.

6.4 Discharge/recharge

The panel 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:

Battery Trouble: Below 11.9 VDC

Battery Restored: Above 12.6 VDC

6.5 Battery supervision

The panel 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.

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.

6.6 XRSuper6/XR20/XR40 power requirements

During AC power failure, the panel and all auxiliary devices connected 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 power requirements of the 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.

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Digital Monitoring Products XR20 Installation Guide Page 11