15-channel Isolated Digital Input Module using the DCON or Modbus Protocol with LED Display. The M-7046 is a 15-channel Digital Input module. Each channel features optoisolation and can be used as a 16-bit counter. In addition, the Digital Input type can be selected as either sink or source via wire connections. The M-7046D module includes 15 LED indicators that can be used to monitor the status of the DI channels. 8 kV ESD protection and 5000 VD..