The I-87053W-A5 provide 16 channels for high voltage digital input, each of which features photocouple isolation. The input voltage level can be as high as 150 VDC. In addition, either sink- or sourcetype digital input can be selected via wire connections, and all channels are able to be used as 16-bit counters. The effective distance for dry contact is up to 500 meters. The I-87053W-E5 also provide 16 LED indicators that can be used to monitor the DI channel status. 4 kV ESD protection and 3750 VDC intra-module isolation are also provided to enhance noise immunity capabilities in industrial environments.