BS 6556-2 specifies the electrical input and output characteristics for the transformer coupling of intrinsically safe transmitting and receiving circuits for use in coal mines. These form a low speed digital data transmission link in which data is transmitted using frequency shift keying techniques.
BS 6556-2 describes a data transmission system which comprises of a master and up to 15 physical slaves. The circuits of all stations are galvanically isolated from the line circuits by transformers.
BS 6556-2 on specification for transformer coupling is helpful for:
Having access to reliable guidelines is essential to effectively use the specification for transformer coupling. BS 6556-2 provides manufacturers with the general conventions, data link configurations, modulation parameters and line circuit parameters. BS 6556-2 allows manufacturers to produce and test quality transformer coupling.
BS 6556-2 provides users with efficient and standardized transformer coupling.