One-port RS-232/422/485 secure device server 

• One RS-232/422/485 serial port for secured serial data over Ethernet transmission
• Secured operation modes - Secure real COM, secure TCP server / client, secure serial tunneling server / client, console management (SSH), and console management direct (SSH)
• Redundant power input (power jack and terminal block) for fail-safe power
• Support Modbus gateway to convert between Modbus TCP and Modbus RTU / ASCII protocols

SN3401 secure device server is an external IP-based network device that securely connects legacy RS-232/422/485 serial devices to an Ethernet network to be accessed remotely from a computer located anywhere, allowing users to expand the number of serial ports for any host computer over a network.

SN3401 is especially suited for industrial process control applications, given the abundant use of the supervisory control and data acquisition (SCADA) systems across many industries for collecting data from PLCs, meters, and sensors via serial ports. SN3401 bi-directionally translates data between serial and Ethernet formats, and facilitates access to the data from all data collection instruments from local and remote sites through an Ethernet network.

SN3401 has a number of useful operation 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 telecom, access control, and remote site management.

SN3401 can be used as standard Modbus gateway to convert between Modbus TCP and Modbus RTU / ASCII protocols. It can integrate Modbus serial slave devices seamlessly into an existing Modbus TCP network and thereby make them accessible to serial master devices.

An easy-to-use, secure, and reliable solution makes it easier to connect a wide range of serial devices to an IP-based Ethernet LAN in an instant. The ATEN SN3401 secure device server provides simple, fast serial-to-Ethernet connectivity, allowing users to remotely access serial RS-232/422/485 devices from a PC located anywhere. With various reliable features, SN3401 is ideal for commercial and industrial process control applications.

Surge and Isolation Protection Ensure System Stability
Surge protection is a vital aspect of any facility's coordinated electrical protection to ensure safe and reliable operation. To this end, in addition to 1.5kV magnetic isolation protection for Ethernet signals, SN3401 secure device server features surge protection for serial, Ethernet, and power that protect against voltage spikes or uncontrolled increase in current. Furthermore, as well as industrial safety standards compliance, they are also tested to meet IEC 61000-4 surge wave form requirements to ensure system stability and reliability.

Level-up Device Security at Every Stage
The growing numbers of cyber attacks in the industrial IoT era has the potential to bring down systems and cause huge losses of time and money. In order to avoid potential vulnerability risks, enterprises need a multi-layered defense system to ensure secure data transmissions that include regular firmware upgrades, as well as various encrypted forms of authentication and access control. SN3401 secure serial-to-Ethernet solution is equipped with security functions at every level, including network access control and user authentication, data integrity and confidentiality. Furthermore, with an operation mode available for advanced security functions, you can acquire any field data needed and provide frontline protection.

Comprehensive Secure Operation Modes
SN3401 offers a broad choice of operation modes to help different types of serial devices to be seen on the network including real COM, TCP, serial tunneling, console management and UDP*. With each operation mode SN3401 is equipped with advanced secure functions to assist users in streamlining operations and ensuring serial data is securely transmitted.

Seamless and Cost-Effective Modbus Gateway
SN3401 can be used as standard Modbus gateway for conversion between Modbus TCP and Modbus RTU / ASCII protocols. It can integrate Modbus serial slave devices seamlessly into an existing Modbus TCP network, thereby making them accessible to serial master devices.

Easy Setup with Web Console and Telnet/SSH Console
SN3401 offers a 3-step setup web console for fast installation. Its browser access is supported via intuitive multi-language features that facilitate a quick setup and control of the devices in just three configuration steps to activate the application. This makes setup simple and fast, and users can complete it in an average of only one minute. Moreover, for bandwidth-sensitive applications, a Telnet/SSH console is also available as a low-bandwidth solution.

Easy to Troubleshoot
ATEN understands the seriousness of data loss and breaches. SN3401 features 64 KB port buffering to prevent data loss in case a network is down, and event notifications will be sent automatically by SMTP email and SNMP Trap if serial devices go offline due to power failure, or trigger a user defined error. Moreover, system event logs are available to record and track operation history, and can be saved to internal memory or Syslog server, so you can retrieve data for monitoring and troubleshooting at any time.

Target Applications
SN3401 enables instant networking of serial devices and can be deployed in a variety of commercial applications and industrial process automation environments that require serial-to-Ethernet connectivity. These include POS, access control, SCADA systems, environment monitoring, sensor monitoring, device management, remote site management, and more.

Versatile Mounting Options
SN3401 can be flexibly mounted in various installation environments, so you can easily configure them to your workplace. Mounting options include wall, desktop, DIN rail mounting, or rack mounting (with optional kit VE-RMK1U) as required.

Serial-to-Ethernet Connectivity
• Software-configurable termination (120 Ω) and pull high/low resistor (1K ohms or 150K ohms) integrated to the RS-485 mode to avoid signal reflection
• Standard operation modes - Real COM, TCP server / client, serial tunneling server / client, UDP, console management (Telnet), and console management direct (Telnet)
• Real COM, real TTY, and fixed TTY drivers for Windows, Linux, and UNIX
• Convenient console management access via Java viewer (SSH / Telnet) or third-party clients such as PuTTY
• Easy console port access via Java viewer and Sun Solaris ready ("break-safe")
• Multiple users can simultaneously access the same port - up to 16 connections per port
• Support Modbus gateway to convert between Modbus TCP and Modbus RTU / ASCII protocols

Hardware
• Redundant power input (power jack and terminal block) for fail-safe power
• Surge protection for serial, Ethernet, and power
• DIN-rail mounting, wall mounting, rack mounting, and desktop installation available
• Supports baud rates of 110, 134, 150, 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 19200, 38400, 57600, 115200, 230.4k, 460.8k, 921.6k bps

Security
• Supports secured login from browsers with TLS 1.2 data encryption and RSA 2048-bit certificates
• Configurable user permissions for port access and control
• Local and remote authentication and login
• Third-party authentication (e.g. RADIUS)
• IP address filter for security protection

System Management
• Browser access with an intuitive GUI design
• Web-based quick setup wizard for fast configuration
• Terminal-based access with a menu-driven UI via Telnet / SSH
• Online / Offline detection of connected serial devices (including terminal blocks) - automatically sending event notifications when the devices are offline (e.g. power failure) for device status monitoring
• System event logs and port logs will be saved to an internal memory or Syslog server
• SNMP agent (v1 / v2c)
• Event notification - supports notification of SMTP email and SNMP Trap (v1 / v2c)
• Backup / Restore system configuration and upgradeable firmware
• 64 KB port buffer prevents data loss when the network is down
• NTP for time server synchronization
• Multi-language web-based GUI

Package Content
1x Secure Device Server
1x Power adapter
1x Terminal block
4x Foot pads
1x DIN rail mount kit
1x User instructions

* UDP is not offered in secure mode