| 摘要 |
<p>Provided is an I/O mix unit having an input function and an output function, comprising: an input circuit which internally receives input of an external signal; an output circuit which externally outputs the internally received signal; a switch which switches a connection between the input circuit and the output circuit; and a plurality of I/O terminals which are connected to the switch. The switch is disposed upon each of the I/O terminals. Thus, in building a sequencer system using an I/O mix unit, if the required numbers of input points and output points do not match, or if changing the numbers of input points and output points after purchasing the I/O mix unit is desired, it is possible to adjust the proportion of input points and output points according to application, and it will be unnecessary to add input units or output units to supplement insufficient quantities of points.</p> |
