Digital Monitoring Products 1912XR Guida di Installazione Scaricare il pdf (Pagina 11)

1912XR Installation Guide

Digital Monitoring Products, Inc. 1912XR Installation Guide

Page 11

7.7 Battery supervision

The 1912XR tests the battery once every hour when AC power is present. The test is done at 15 minutes

past the hour and 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.

7.8 Battery cutoff

The panel disconnects the battery any time the voltage of the battery drops below 10.2 VDC. This prevents

deep discharge damage to the battery.

Bell Output

8.1 Terminals 5 and 6

Nominal 12 VDC is supplied by terminal 5 on the panel to power alarm bells or horns. The output is rated

for a maximum output of 1 Amp. This output can be steady or pulsed depending upon the Bell Action

specified in Output Options. Terminal 6 is the ground reference for the bell circuit.

Keypad Data Bus

9.1 Description

Terminals 7, 8, 9, and 10 of the 1912XR panel are designated as the keypad data bus. You can connect

any combination of Security Command keypads and loop expanders up to the maximum of eight devices.

9.2 Terminal 7 - RED

This is a positive 12 VDC for powering Security Command keypads and loop expanders on the keypad

data bus. This is also where power for any auxiliary device is supplied. The ground reference for terminal 7

is terminal 10. The maximum output is rated at 600mA when using a 40VA transformer. The output current

is shared with the smoke detector output on terminal 11 and Loop 5. The auxiliary output power can also

be internally connected to the common terminal of relay output 1 by installing the J15 jumper. All auxiliary

devices totalled together must not exceed the panel's maximum current rating.

Terminals 7 also provides power for devices used on 862N, 862P, 872, and 881 expansion cards.

9.3 Terminal 8 - YELLOW

Data receive from keypads and loop expanders. It cannot be used for any other purpose.

9.4 Terminal 9 - GREEN

Data transmit to keypads and loop expanders. It cannot be used for any other purpose.

9.5 Terminal 10 - BLACK

Terminal 10 is the ground reference for Security Command keypads, loop expanders, and any auxiliary

devices being powered by terminals 7 or 11.

Smoke and Glassbreak Detector Output

10.1 Terminal 11

This is a positive 12 VDC for powering 4-wire smoke detectors or other powered devices. This output can

be turned off by the user for 5 seconds using the Sensor Reset Menu Option to reset latched devices.

Terminal 10 is the ground reference for terminal 11.

10.2 Current rating

The Output current from terminal 11 is shared with terminal 7 and terminal 12. The total current draw of all

devices powered from the panel must be included with terminal 7 calculations and must not exceed the

maximum output rating of 600mA.

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Digital Monitoring Products 1912XR Guida di Installazione Pagina 11

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