ATEN 

ATEN SN3401 1-PORT RS-232/422/485 SECURE DEVICE

Mfg Part Number:  SN3401  
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Price: $156.68 + Free Shipping
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In Stock/Mfg Direct Ship
Last Updated: Mar 19, 2026
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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, the 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, the 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. The 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

The 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

The 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

The 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. The 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.

Main Specification
General Information
Manufacturer ATEN Technology, Inc
Manufacturer Part Number SN3401
Manufacturer Website Address http://www.aten.com/us/en/
Brand Name ATEN
Product Model SN3401
Product Name 1-Port RS-232/422/485 Secure Serial Device Server
Packaged Quantity 1
Product Type Device Server
Technical Information
Connectivity Technology Wired
Data Link Protocols UDP
Data Link Protocols TCP/IP
Media & Performance
Media Type Supported Twisted Pair
Network & Communication
Ethernet Technology Fast Ethernet
Network Standard 10/100Base-TX
Interfaces/Ports
Network (RJ-45) Yes
Serial Port Yes
Total Number of Network Ports 1
Number of Network (RJ-45) Ports 1
Number of Serial Ports 1
Environmental Conditions
Minimum Operating Temperature 32°F (0°C)
Maximum Operating Temperature 140°F (60°C)
Power Description
Input Voltage 48 V DC
Input Voltage 9 V DC
Input Voltage Range 9 V DC - 48 V DC
Power Consumption 1.30 W
Plug/Connector Type Terminal Block
Physical Characteristics
Product Material Metal
Form Factor Wall Mountable
Form Factor Desktop
Form Factor Rack-mountable
Form Factor DIN Rail Mountable
Height 1"
Width 4.6"
Depth 3.9"
Weight (Approximate) 7.05 oz
Miscellaneous
Package Contents
  • 1-Port RS-232/422/485 Secure Serial Device Server
  • 1 x Power Adapter
  • 1 x Terminal Block
  • 1 x Foot Pad Set (4 pcs)
  • 1 x DIN Rail Mount Kit
  • 1 x User Instructions
Certifications & Standards
  • EMC: EN 55032/35
  • EMI: CISPR 32, FCC Part 15B Class A
  • IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
  • IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
  • IEC 61000-4-4 EFT: Power: 1 kV; Signal: 0.5 kV
  • IEC 61000-4-5 Surge: Power: 2 kV (Power Adapter), 1kV (Terminal Block); Signal: 1 kV
  • IEC 61000-4-6 CS: 150 kHz to 10 MHz: 3 V/m; 10 kHz to 30 MHz: 3 to 1 V/m; 30 kHz to 80 MHz: 1 V/m
  • IEC 61000-4-8 PFMF
  • IEC 61000-4-11 DIPs
  • Safety: UL 60950-1 and UL 62368-1 standards compliant
Environmental Compliance Restriction of Hazardous Substances (RoHS)
Warranty
Limited Warranty 3 Year
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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