ART214 - START / STOP INTERFACES   ART864 extension ART 214 is an extension of ART864. It uses the same input ouputs board as ART864 boards that is to say 1 IN+ 1 OUT, 2 IN or 2 OUT. Maximum input is 7 for each board, this increases to 64+14=78 inputs / ouputs as a maximum when using ART124 + ART864.