Neat WALL Famiy, Technical Handbook

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neat
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NE41 11014-02 v4.1 WALL - Technical Handbook
2.7 Power supply
The unit can be powered from 2 pcs of AAA alkaline batteries or from 24 V
DC
. If
using both batteries and 24 V
DC
, the batteries will work as power backup. 24 V
DC
is
connected to connectors 7 and 8.
The battery status is monitored, see "5.12.3 Technical alarms".
In the running text 24 V
DC
is used generally for 10-28 V
DC
power supply.
If the unit is to be used as a radio receiver it must be powered by 24 V
DC
.
Supply power must not exceed values specified in the technical data, "Appendix A
Technical data". The unit must only be powered from alkaline batteries of type GP
Ultra Alkaline AAA or GP Super Alkaline AAA.
2.7.1 Mains failure/return
When the unit is configured for and supplied with 24 VDC and batteries are mounted
and in the event of power failure the unit sends a Mains failure alarm after a
randomized time between 30 and 750 seconds. If the power returns before the alarm
is sent, no alarm is sent.
When the power returns after the alarm is sent, the unit sends a
Mains return
alarm
after a randomized time between 30 and 750 seconds. If there is a mains failure
again before the alarm has been sent, the unit will not send any Mains return alarm,
but instead again wait for the power return.
If the unit is configured for and supplied with 24 VDC and no batteries are mounted,
no Mains failure nor Mains return alarms are sent, the unit is regarding this a regular
power off and -on.