Description
The SN3402P is a secure serial-to-Ethernet device server that connects legacy RS-232 / RS-422 / RS-485 equipment to IP networks. It enables remote access to serial devices over Ethernet and supports secure management and encrypted communications. The unit is optimized for industrial environments where reliable serial data transport is required.
Key features include two software-configurable serial ports, multiple secure and standard operation modes, and built-in Modbus gateway functionality. The SN3402P supports Secure Real COM, Secure TCP Server / Client, Secure Serial Tunneling Server / Client, and SSH-based console management. It also provides standard modes such as Real COM, TCP Server / Client, Serial Tunneling, UDP, and Telnet console access.
Performance and reliability are provided through software-configurable RS-485 termination and pull high/low resistors, extensive baud rate support up to 921600 bps, and 64 KB port buffering to prevent data loss during network outages. The device supports up to 16 simultaneous connections per port and integrates Modbus TCP with Modbus RTU / ASCII for protocol translation. Surge protection and 1.5 kV magnetic isolation are included to protect communications in noisy environments.
Connectivity options include 2 x DB-9 male serial ports, a 10/100 Mbps RJ-45 network port with PoE (IEEE 802.3af) support, a DC jack, and a 3-pin terminal block for redundant power input. Management is available via a browser-based GUI, a web quick-setup wizard, and Telnet / SSH console access, and it supports SNMP, Syslog, NTP, SMTP event notifications, and RADIUS authentication.
The SN3402P is designed for industrial process control, SCADA, remote site management, POS systems, access control, and sensor monitoring. It provides secure remote access to serial devices, event notification for device offline detection, and comprehensive logging for troubleshooting. The compact metal housing supports DIN-rail, wall, desktop, and rack mounting.
Installation is straightforward using the 3-step web console setup or low-bandwidth Telnet / SSH console. The device supports firmware upgrades, backup and restore of configuration, and multi-language GUI. With PoE support and redundant power inputs, the SN3402P offers a secure and dependable serial-to-Ethernet solution for commercial and industrial deployments.
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
