KROHNE TTP 400 EN - Manual (Page 5)

Installation and Operating Instructions TTP x00 5
2 Electrical connection
2.1 External signal converter
Terminals 1, 2 and 3, 4 are used for connecting up the Pt100 sensor. You can, as required,
connect up in 2-, 3- or 4-wire technology.
• The 2-wire connection should not be used when particularly high accuracy is required and
where the connecting cables are of longish length.
• When using a 3-wire connection, make sure that all wires have the same cross-sectional area.
The same options are available for the double Pt100, but if connection is made with an M12
connector then only the 2-wire connection may be used.