Description
The SN3402 Secure Serial Device Server provides a secure bridge between legacy serial equipment and modern IP networks. It converts RS-232 / RS-422 / RS-485 serial data into Ethernet packets so remote hosts can access serial devices over a LAN or WAN. The unit supports secure management and encrypted data channels for critical deployments.
The device offers multiple secured operation modes including Secure Real COM, Secure TCP Server / Client, Secure Serial Tunneling Server / Client, and SSH console management. It supports Modbus gateway functionality to translate Modbus TCP to Modbus RTU / ASCII and back. Redundant power inputs plus PoE PD support enable resilient installations in constrained power environments.
Performance details include support for common baud rates up to 921600 bps, Real COM and Real TTY drivers for major operating systems, and a 64 KB port buffer to prevent data loss during network outages. Software-configurable RS-485 termination and pull-high/pull-low resistors help maintain signal integrity on long runs. The unit includes surge and magnetic isolation protection to improve system stability in industrial settings.
Connectivity options comprise a DB-9 serial connector, a 10/100Base-TX RJ-45 Ethernet port with 1.5 kV magnetic isolation, a DC jack and a 3-pin terminal block for power, and PoE (IEEE 802.3af) capability. The SN3402 supports multiple simultaneous connections to a single serial port and provides browser-based and terminal-based management interfaces. It also integrates with SNMP, Syslog, NTP, SMTP, and RADIUS for monitoring and authentication.
Typical use cases include SCADA and industrial process control where remote access to PLCs, meters, and sensors is required, POS and access control systems that rely on legacy serial peripherals, and remote site management where secure console access is necessary. The Modbus gateway capability simplifies integration of serial Modbus slaves into Modbus TCP networks. The device is suitable for networked equipment rooms and dispersed field sites alike.
Installation is straightforward with wall, desktop, DIN-rail, or optional rack mounting. The metal housing provides robust protection and the unit is engineered for operation between 0 and 60 degrees C with 5 to 95 percent non-condensing humidity tolerance. Firmware upgrade, backup/restore configuration, and event logging simplify long-term maintenance and troubleshooting.
Free Ground Shipping
We offer free ground shipping on every purchase of $300 and more for US and US territory. Please choose "Free Ground Shipping (UPS/USPS)" option at checkout.
UPS Ground
UPS provides up-to-date tracking information. Ground service takes anywhere from 2-7 working days for delivery depending on destinations. UPS Ground does not deliver on Saturdays, Sundays or Holidays.
USPS Priority Mail/USPS Express Mail
For all shipments shipped via USPS, we offer 'DELIVERY CONFIRMATION' number with each package. Difference between tracking number provided by UPS vs USPS Delivery Confirmation number is: Delivery Confirmation status is updated when the delivery has been made or when the package has made it through major USPS stations.
Air Shipment
Air shipments, Overnight, 2nd day and 3 day select methods offer guaranteed delivery time for your shipment. If you are in hurry or in need for the items on schedule, select one of these methods. Up-to-date tracking information is provided with each Air Shipment. AVProSupply has the right to choose between Air shipments to meet or reduce delivery time. For guaranteed delivery of multiple items with expedited shipping, please contact our customer service representative for personalized assistance to get your items delivered to you when you need them.
International Customers
We offer shipping via USPS/UPS for our international customers. You can find different shipping options during checkout.
Most items ordered from AVProSupply will be shipped out from our California Warehouse. Will-Calls are only allowed with Appointment Only - Please call Customer Service to set one up between the hours of 9am to 6pm PST.
We Offer A 30-Day Money Back Guarantee:
Our main goal is to ensure your complete satisfaction with our service and products. If, for any reason, you are not 100% satisfied with your purchase, you can return it within 30 days of the purchase date for a full refund. Our 30-day money back guarantee applies to all of the products we sell, except for: TVs and monitors 20" and larger, Special Order merchandise, or any item indicated as non-returnable. Shipping is not refundable. Prior to returning your purchase, a Return Merchandise Authorization (RMA) number will be provided to you.
Refunds:
Refunds on returned items will be issued in the same payment form as received from the customer at the time of purchase. Once we receive the product and it passes inspection, we will credit your account. Please allow 3 - 6 business days for a credit to appear on your account.
Exchanges:
If the item was sent back to us for an exchange, please allow 3 - 5 business days for the replacement to be processed.
No Returns/Exchanges on the following:
- TVs and monitors 20" and larger
- Special Order merchandise
- Any item indicated on the website as non-returnable
For more information see our official Return Policy
