Power Supply And Analog Output; 14 4-Wire Connection - Tecfluid M21 Series Instruction Manual

13.1

Power supply and analog output

12 to 36 VDC
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 are the same. It is recommended
to use a twisted pair wiring or shielded cable to avoid interferences in the current loop.
14 4-WIRE CONNECTION
If Direct Current power supply for the transmitter is not available in the installation, it will be
necessary to incorporate an additional power supply as in the following figure.
Power
Mains
supply
21