MDSB302E series detection terminal distribution type safety barrier products compatible with the distribution and isolation of two modes: distribution pattern, provide to 2 wire transducer for the dangerous sites work power, sample transmitter output 2 wire current signal, after dealing with the isolation into a 4 wire current signal output; Isolation mode, sampling 4 wire current signal, after isolation output 4 wire system current signal. Input mode can be set by using the toggle switch in the upper side of the product. 1, 1, 1, 2, 2 out. The isolation gate restricts the energy from the terminal to the dangerous place, thereby ensuring that the system is explosion-proof.