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SFIDK.PS.022.Q5.02
Cable binder
Potential hazards grounding
Earth wire
In mains powered units the protective earth wire
must be connected to the PE on the printed
circuit board using the connector.
Do
not
touch the rear of the printed circuit board.
4.2.5 Mains powered units with back-up battery
If SITRANS FUS380 and FUE380 is mains powered, a battery can be inserted as back-up power
supply to ensure continuous operation in the event of power failure. Depending on duration and
numbers of mains power failures, the battery has a lifetime of minimum 6 years (one battery).
(Average: one mains power failure per day (duration 1 hour) for min. 6 years).
Check that the mains power supply symbol appears in the display when installation is complete.
This symbol indicates that installation is correct. If the mains power supply connection is not
established correctly, the flowmeter will operate on battery power only. Battery life will be
significantly shorter if batteries are used continuously as opposed to only occasionally in a back-
up function.
Top of connection board
Mains powered units:
Terminal L1, N, terminal
Voltage: 87 V AC…250 V AC