Structure and function
Function
3
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Building Technologies
009865_m_en_--
Fire Safety
2015-11-06
3.10.7 Power supply
Radio gateway FDCW221
The radio gateway is normally powered via the FDnet detector line.
Should the mains voltage fail, the radio gateway is powered via the battery in the
control panel.
Brief open lines (<5 hours) on the detector line can be bridged by the 9 V lithium
manganese dioxide batteries.
DOW1171 radio smoke detector
Power is supplied to the power supply via two 9 V lithium manganese dioxide
batteries.
Manual call point SMF121 and radio base SMF6120
Power is supplied to the manual call point and the radio base via two 3.6 V lithium
batteries. The battery compartment is located in the radio base.
See also
2
9 V lithium manganese dioxide battery [
2