This product is an interface module that performs digital signal input and output to external devices.Connect to the controller module of the F & Amp; EIT series.In addition, you can expand your entry / out emotional point by connecting to Di-16 (USB) GY.Also, since the CPU that controls external signals and modules is insulated by photocoupla, it does not provide an external electrical effect on the host computer.You can enter up to 16 points in one module.- [Extended module] Bus specification F & Amp; EIT Stack Size F & Amp; EIT 1u Used connector - [Digital input/output] number of input points 16 points Output points - two -way score - Response speed (input) 1msec (max.) Response speed (output) - Operate voltage (input) 12-24VDC Operate voltage (output) - input circuit Photoba plastic insulation input (compatible with sink and source output) Output circuit - Built -in power supply -