Installation Of Transmitter Compact/Remote Versions; General Information; Insulation; Mains Powered Version - Siemens SITRANS FUS380 Operating Instructions Manual

4.2

Installation of transmitter compact/remote versions

4.2.1 General information

The transmitter is packed separately - ready for plug-in into the base part.
SITRANS FUS380 and FUE380 may be mains powered or battery powered. Determine the
flowmeter power source type by reading the label or via the product code.
Important:
A transmitter ordered as only battery powered cannot be updated with additional mains power,
because no mains power supply circuits are installed in this transmitter type.
On compact versions, all transducer cables are pre-mounted from factory.
Mounting of output pulse cables is identical for compact and remote versions.

4.2.2 Insulation

Both versions can be insulated.
Siemens always recommends insulation of the sensor in the compact version to prevent heat
transfer to the transmitter. The recommendation applies to both battery powered and mains
powered versions.

4.2.3 Mains powered version

The mains powered version can always be retrofitted with a battery pack.
In the event of power failure the battery will take over the power supply of the unit.
The battery is not of a rechargeable type. The battery must be replaced every 6 years.
At delivery the transmitter may be pre-mounted with a battery pack. Alternatively, the battery
pack must be installed before use. (See section „Battery powered version").
Note
The male battery plug is not connected to the plug female socket connection upon delivery. This
connection must be made to enable the back-up battery power supply. Please refer to the section
„Battery powered installation" for further details.

4.2.4 Wiring diagram for mains power supply, pulse output

Always disconnect mains supply before removing the transmitter top part (mains powered units
only).
Important
Cable binder must be fastened to printed circuit board according to drawing.
SFIDK.PS.022.Q5.02
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