Terminal block unit, and monitoring system using the same

An enclosure housing one or more connected terminal block units and a host apparatus, each of the one or more connected terminal block units being a terminal block unit that is a minimum unit for constructing a measurement system using a sensor,

• wherein each of the one or more connected terminal block units:
• (a) is used intervening between (i) the sensor or an apparatus to be controlled connected lower than the terminal block unit and (ii) the host apparatus connected higher than the terminal block unit;
• (b) comprises a plurality of input/output terminals and is electrically connected to the sensor or the apparatus to be controlled through at least one of the plurality of input/output terminals;
• and
• (c) is configured so that direct connection is possible between the terminal block unit and another terminal block unit and between the terminal block unit and the host apparatus through a common serial bus,
• wherein the host apparatus is a measurement terminal having a function of recording data output from the one or more connected terminal block units.