Industrial Serial Device Server

When connecting legacy field equipment to modern SCADA or cloud platforms, generic consumer hardware fails. Valtoris engineers industrial serial device servers (RS232/RS485/RS422 to Ethernet/Wi-Fi) specifically designed for harsh environments. Instead of simple transparent transmission, our converters feature built-in Modbus RTU to TCP gateways, MQTT protocol support, and robust electrical protection—ensuring reliable telemetry for factory automation and power distribution networks.

Network topology diagram showing Valtoris serial device server connecting RS485 Modbus RTU meters to a TCP/IP SCADA system.

Choose the Serial Device Server for Your Industrial Connectivity Project

Find the ideal serial device server for your project to achieve reliable data transmission, seamless network integration, and top-quality performance every time.

Serial to Ethernet
1CH RS232485422 ETH V 4A
Serial to WiFi

Ready for a Quote on Your Serial Device Server?

1CH RS232485422 ETH 4 edited

Frequently Ask Questions

Q1: How do I connect multiple serial devices to a single Ethernet connection?

A: There are 2 industrial processes. First, combine multiple local serial devices into one RJ45 uplink with a Multi-Port Serial Server (e.g., a 4-port or 8-port server) Second, employ the Daisy-Chain Topology. Serial servers with dual Ethernet ports are used as an unmanaged switch. You can daisy chain them and completely remove the need for outside industrial switches in your cabinet.

Q2: My legacy SCADA software only recognizes local COM ports (COM1, COM2). How can it read data from an Ethernet serial server?

A: You do this with a Virtual COM Port (VCOM) program. Our servers include a utility that installs on your Windows or Linux host. It maps the remote serial device server IP address to a virtual local COM port. Your legacy software will work as if the RS232/RS485 device was directly plugged into the back of the PC.
(For complete software configuration see our complete [RS232 to Ethernet Conversion & Pinout Guide])

Q3: What is the difference between simple “Transparent Transmission” and a true “Modbus Gateway”?

A: Transparent transmission just puts the original serial data into TCP packets and blindly sends it. This is fine for basic ASCII data, but it often causes timeout errors and bus lockups when polling Modbus RTU due to network latency. A true Modbus Gateway actively translates the protocol from Modbus RTU to standard Modbus TCP/IP. It manages slave IDs, packet parsing and buffers data locally to avoid polling conflicts and provide instantaneous SCADA responses.

Q4: Do I need separate device servers for RS232 and RS485 equipment?

A: Not if you pick a versatile 3-in-1 model. Our next generation serial device servers like the [1CH-RS232/485/422-ETH series] combine all three major serial interfaces into one device. This enables system integrators to standardize on one hardware model over an entire plant, with easy bridging between legacy RS232 PLCs and long-haul RS485 sensor networks.

Q5: Can multiple SCADA masters poll the same serial device server at the same time?

A: Basic transparent converters will lock up or return garbled data if two TCP hosts poll the same RS485 bus simultaneously. As a specialized manufacturer of serial connectivity, our advanced servers feature built-in Multi-Host support and Modbus storage caching. This allows multiple SCADA systems to query the server concurrently, returning data in milliseconds without causing serial bus collisions.

Q6: How do these servers handle power surges and ground loops in factory environments?

A: Consumer-grade converters will fail instantly under electrical stress. Because serial connectivity is our core engineering advantage, Valtoris industrial units are built with robust electromagnetic isolation (EMI), dedicated serial port surge protection, and wide-voltage inputs (e.g., 9-24V DC). They are rigorously tested to survive the harsh electrical transients common in power distribution and heavy manufacturing.