The modem can be used for any device with HART ability complying with the Communication Conditions as above. It should be connected to the field device by 2 pieces of KLEPS2. Arrangement of the modem within the HART system is to be seen on the drawing. . Positioning of the clips is independent from the polarity. SAT-304 is not provided with surge protection, thus the lightning protection of the relevant HART standard has to be used.