125736-01 is a Communication Gateway I/O Module developed by Bently Nevada. It functions as a ModbusRS232/RS422 I/O Module. With the exception of the primary value Modbus registers, it supports the original 3500/90's communication interfaces, communication protocols, and other features. Itincludes a Configurable Modbus Register Utility, which can provide the same functionality that the primary value Modbus registers did.