The I-7052 offers 6 fully independent channels and 2 common ground channels for digital input. The diffential inputs feature channel-to-isolation. In addition, you can choose either sink- or source-type input via wire connections. All channels are able to be used as 16-bit has 8 LED indicators for DI channel status monitoring. 4 kV ESD protection and 5000 Vrms intra-module isolation are standard. The M-7052 has the same hardware specifications as the I-7052, but provides additional support for the Modbus RTU protocol as well as the DCON protocol. The I-7053_FG features a long effective distance measurement for dry contact digital input of up to 500 meters. The I-7053_FG supports source-type input. All 16 channels are also able to be used as 16-bit counters, each of which are non-isolated. The I-7053D_FG has 16 LED indicators for channel status monitoring. The M-7053 has the same hardware specifications as the I-7053_FG, but provides additional support for the Modbus RTU protocol as well as the DCON protocol.