16-channel Isolated Digital Input & 16-channel Isolated Digital Output Module. I-87042W offers 16 channels for digital input and 16 channels for digital output.Each of which features Photo-couple isolation.I-87042W supports sink type output with short-circuits protection. There are option for power on value and safe value for your consideration. About Input, you can chose sink type or source type input by wire connection. All channels are abl..