Digital Monitoring Products XR20 Guía de instalación descargar pdf (Pagina 13)

XRSuper6/XR20/XR40 Installation Guide Digital Monitoring Products

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 XRSuper6, XR20, or XR40 circuit board. Connect the red battery

lead to the positive battery terminal. Observe polarity when connecting the battery.

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 4.

Use sealed lead-acid batteries only: Use the DMP Model 367, 12 VDC 7.0 Ah 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 replacing the battery every 3 to 5 years under normal use.

6.4 Discharge/Recharge

The panel battery charging circuit oat charges at 13.9 VDC at a maximum current of 1.2 Amps using a 40 VA

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. This test occurs 15 minutes past

each hour and lasts for ve 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 DMP

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.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 30 31

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Digital Monitoring Products XR20 Guía de instalación Pagina 13