FIELD: electronics. SUBSTANCE: invention is related to circuit to exchange input-output signals between devices operating under one of assemblage of modes with use of single channel, it can find use in measurement electronic units of Coriolis mass flowmeter. Its employment makes it feasible to obtain technical result in the form of minimized number of leads- out needed in measurement electronics to support various auxiliary devices operating under different modes. This technical result is achieved due to formation of signal input-output circuit which can operate under assemblage of modes with use of single channel in circuit transmitting signals to auxiliary device and/or receiving signals from auxiliary device. First subcircuit in signal input-output circuit regulates current flowing from power supply source to grounding. Second subcircuit regulates voltage between positive potential lead-out and negative-potential lead-out applied to auxiliary processor. Processor determines proper mode under which circuit should operate and then generates signals to tune first and second subcircuits to configure multi-mode signal input-output circuit. EFFECT: minimized number of leads-out. 23 cl, 4 dwg
