Intrinsically safe isolating explosion-proof type analog quantity output system
An analog, explosion-proof technology, applied in electrical program control and other directions, can solve the problems of system hardware costs and maintenance, maintenance costs are difficult to reduce, domestic products are difficult to large-scale projects, hinder the expansion of the system scale, etc., to improve market competition. power, improve anti-interference ability, reduce the effect of calorific value
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[0032] Such as figure 1 As shown, an intrinsically safe isolation and explosion-proof analog output system includes a power supply voltage stabilization circuit 1, a DC / AC conversion circuit 4, a first AC / DC conversion circuit 5, a second AC / DC conversion circuit 6, Signal output circuit 7, intrinsically safe energy limiting circuit 8, signal transmission modulation circuit 10, HART signal demodulation circuit 12, HART signal modulation circuit 13, signal transmission demodulation circuit 9, signal input current limiting circuit 11, first transformer 14, The second transformer 15, the third transformer 16, the power supply voltage stabilizing circuit 1 is connected with the DC / AC conversion circuit 4, and the described DC / AC conversion circuit 4 is respectively connected with the first AC / DC conversion circuit through the first transformer 14 5. The second AC / DC conversion circuit 6 is connected, and the first AC / DC conversion circuit 5 is respectively connected with the signa...
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