Tecfluid TH7 - Manual (Page 8)

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The connection is made in the terminal block. The positive terminal of the power supply is
connected to the position + and the positive terminal of the load in the position -. The
negative terminals of the power supply and the load are connected together. The
instrument works in a 2-wire system, that is, the supply and signal line is the same. It is
recommended to use a twisted pair wiring or shielded cable to avoid interferences in the
current loop.
4.2 Digital output
The pulse output is connected in the positions D and S of the terminal block. The output is
an N channel MOSFET transistor isolated from the rest of the circuit and potential free.
The S terminal is the source and the D terminal is the drain.
By means of the Winsmeter TH7 software, the digital output or the pulse output can be
programmed (see section 9.3 in page 16).
Before connecting the power supply, you must be sure that the supply voltage is the
correct one for the installation. The power supply voltage is indicated on the label of the
transmitter.
4.1 Power supply and analog output