WTAU –100 / 120 / 200 / 220
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Electrical connection
The electrical connection of the device must be carried out according to the respective country specific
standards. Incorrect installation or adjustment could cause applicationally conditioned risks.
Power supply input, measuring input and signal output channels are safe galvanically isolated from each other.
This is also valid for both signal output channels among each other.
Connection of the Pt100 – measuring input
For the two or three-wire connection cable between the isolation amplifier and the Pt100 a standard installation
cable or multi-wire cable for measuring intends with a maximum of 25
per wire can be used.
Pt100 in 2- or 3-wire-measurement can be connected.
At a 2-wire-measurement the terminals 1 and 2 must be connected by a wire link.
A 4-wire-measurement of the Pt100 is not possible. When connecting a 4-wire Pt100 this must be proceeded in
3-wire-measurement, whereas the not used fourth wire may not be connected..
The use of a shielded signal cable is recommended, if strong electromagnetic influences could happens, e.g.
due to machines or radio equipment. In that case the shielding of the cable should be connected to earth only at
the side of the Pt100.
The signal cable should be installed separated from power leading wires.
Terminal occupation
Connection scheme
