The K-System HART Multiplexer works as a master/slave system. Up to 15 additional slaves can be connected to the master, each of which can support another 16 channels. When fully equipped, one K-System HART Multiplexer can drive up to 256 HART field devices. This allows up to 7936 field devices to be addressed through one RS485 interface with 31 K-System HART Multiplexers.