This paper describes a custom made high voltage isolated bidirectional network interface for communication among FPGA devices, which are in different power domains. Preliminary performance test and measurements of noise tolerance and stability are presented. A case study of an application regarding a network of multiple single-channel power supply systems for Micro Pattern Gaseous Detectors is portrayed. In order to match the specific system needs of dynamic voltage control, the network interface provides a reliable high voltage decoupling up to 2 kV with reasonable noise tolerance and data transmission rate up to 100 Mbps. The flexibility of the interface allows the implementation of different communication protocols.
