5.2 Battery-powered transmitter
The battery-powered transmitter is prepared for one battery pack of 2 lithium 3.6 V D-cell
batteries. 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 69). Every time a battery plug is reconnected, the unit runs a start-
up routine, see Start-up routine (Page 51).
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.
5.3 Compact system
The following chapters describe how to connect a compact system. If you want to connect a
remote system proceed with chapter Remote system (Page 37).
1. Connecting battery (battery-powered versions and mains-powered versions with back-up
battery) (Page 33)
2. Connecting Siemens sensor link cable (Page 33)
3. Connecting power supply cable (main-powered systems only) (Page 34)
4. Connecting pulse output signal cable(s) (Page 35)
5. Finishing connection (Page 37)
Connecting
5.3 Compact system
SITRANS FUS380/FUE380
32 Operating Instructions, 05/2018, A5E00730100-AE
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