Installation manual

System Power, Internal Battery & Power Saving (continued)

During low-power mode, all functions continue to operate as normal but up/

downloading is disabled and polling (see page 15) will fail. Alarm signals may

still be sent (providing there is sufficient power to operate the unit) but an addi-

tional 30 seconds must be added to the reporting time.

The supply and internal battery voltage is continuously monitored. If this voltage

has fallen to the ‘low-battery voltage’ a battery fault will be signalled to the ARC.

When power is restored above 12.0 volts and the low-power mode is termi-

nated, a test call (or battery voltage restore signal) will be sent to the ARC.

Polling will also be re-established.

If the external supply or internal battery voltage continues to fall below 10 volts

there will be insufficient power to operate the unit and the batteries may suffer

permanent damage. To protect against this, the Dualcom will switch off com-

pletely and stay off until the external supply is restored. When Dualcom is

switched off up/downloading is disabled and no alarm signals can be sent.

Note:

The Dualcom ‘Start’ ‘+’ & ‘-’ terminals next to the 8 input terminals are voltage

outputs to aid input triggering only. These terminals are NOT the supply

connector. See Fig 1, 2 and Appendix 2.