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4.3.2
Battery-powered transmitter
The battery-powered transmitter is prepared for one battery pack of 2 lithium 3.6 V D-cell
batteries and a single backup battery. The battery lifetime depends on the use of the different
functions, for example the use of Modbus IrDA communication or higher pulse output frequency
will decrease the lifetime significantly. Under normal temperature and working conditions a
battery can have an operation lifetime of up to 6 years. The typical liftetime of a dual battery
pack with nominal working pulse output frequency of 20 Hz is approximately 4.2 years.
Siemens recommends replacing batteries after maximum 6 years. For the replacement, see
Battery replacement (Page 63) and Start-up routine (Page 47). Every time a battery plug is
reconnected, the unit runs a start-up routine, see Start-up routine (Page 47).
Note
The male battery plug is not connected upon delivery. This connection must be made to enable
the back-up battery power supply.
Note
Changing the battery does not influence the settings and accumulated values.
Installing/Mounting
4.3 Transmitter installation (compact/remote versions)
FUS380/FUE380
Operating Instructions, 09/2016, A5E00730100-AB
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