The Secure Device Server SN3402P is an external IP-based network device that securely connects older serial RS-232/422/485 devices to an Ethernet network and enables remote access from any computer.

The SN3402P is particularly suitable for industrial process control applications, as Supervisory Control and Data Acquisition (SCADA) systems are widely used in many industries to collect data from PLCs, measuring devices, and sensors via serial interfaces. The SN3402P translates data bidirectionally between serial and Ethernet formats, allowing access to the data from all data acquisition devices from local and remote locations over an Ethernet network.

The SN3402P features a range of useful operating modes. It supports secure TCP server/client, secure serial tunneling server/client, secure Real-COM, and console management modes for security-critical applications, such as telecommunications, access control, and remote site management. Additionally, the IEEE 802.3af-compatible models can be powered by a PoE-PSE device without the need for an additional power supply.

The SN3402P can be used as a standard Modbus gateway to convert between the Modbus-TCP and Modbus-RTU/ASCII protocols. It can seamlessly integrate serial Modbus slave devices into an existing Modbus-TCP network, making them accessible to serial master devices.