Industrial Serial Device Server
Connecting Legacy Equipment to Modern Ethernet Networks
A device that ran flawlessly on RS-232 ten years ago is still running today, it just doesn't speak Ethernet. That's the exact problem an industrial serial device server solves, sitting between legacy serial equipment and modern IP-based networks so both sides can exchange data without a hardware swap.
Serial device servers show up wherever older equipment needs to join a newer network. That includes serial device networking for manufacturing lines, serial communication for energy systems, oil and gas monitoring, water treatment operations, and transportation infrastructure, anywhere industrial serial communication still carries critical data.
Why Legacy Serial Equipment Needs a Device Server to Join the Network
A facility rarely has the luxury of a single, clean network. Most run a mix of decades-old serial devices and newer Ethernet-based systems, and that mismatch creates real operational friction. A PLC running RS-485 can't simply join a modern SCADA network without help, and forcing that connection without the right hardware usually means dropped data or unreliable readings.
The requirement isn't complicated, but it's specific: a way to bring serial devices onto the network without replacing equipment that still works, without introducing new points of failure, and without requiring a specialist to manage it daily. That's the gap a properly chosen serial device server is built to close.
At its core, a serial device server converts serial signals into Ethernet-ready data, allowing you to connect serial devices to Ethernet without touching the equipment itself. This means legacy hardware, PLCs, RTUs, meters, and controllers can join a modern network exactly as they are.
This matters most when you need to connect legacy serial devices that were never designed with networking in mind. Once connected, these devices support serial device networking across the facility, enabling remote access to serial devices that would otherwise require someone physically present to check.
For industrial serial communication feeding into PLC systems, SCADA systems, and broader automation systems, this connection isn't a convenience; it's often the only practical way to bring older industrial equipment into a centralized, monitored network without a costly replacement project.
Which Serial Device Server Fits Your Situation?
Interfaces, port counts, and protocols all matter, but the fastest way to narrow the field is to start from what your facility actually needs. The table below maps common situations to the hardware and brand that typically fits best.
Trusted Serial Device Server Brands ManuAuto Distributes
Not every manufacturer builds serial device servers for the environments they actually end up in. Some prioritize cost over durability, which shows up quickly once a device is deployed in a facility with real temperature swings or electrical noise. ManuAuto partners with established industrial serial device server brands, giving facilities access to hardware backed by real engineering support, not just a catalog listing.
Moxa
Moxa is ManuAuto's primary serial device server partner and the brand we reach for first in most deployments. Its NPort series spans general-purpose models (NPort 5000/6000), hazardous-location-rated units (NPort IA5000A, ATEX/Class I Division 2/IECEx), and wireless options (NPort W), backed by decades of field-proven reliability.
A few other brands round out the lineup for specific situations:
- Westermo — rugged, rail-grade connectivity for transportation and harsh outdoor sites
- Advantech — EKI-series device servers from 1 to 16 ports, with built-in security options
- Robustel — cellular-connected device servers for sites with no wired network
Ready to Connect Your Serial Devices to a Modern Network?
Choosing the right serial device server depends on your port count, protocol requirements, and network environment, and getting that match wrong usually means troubleshooting problems that a better initial fit would have avoided. As a serial device server distributor in Canada, our team helps facilities confirm the right model, starting with Moxa where it fits, before ordering, so the integration goes smoothly the first time and stays reliable well after installation.
Whether you're connecting a single legacy device or planning a facility-wide rollout, a quick conversation upfront saves time, budget, and unnecessary rework down the line.
Common Questions About Industrial Serial Device Servers
1. What is a serial device server?
A serial device server is hardware that connects serial devices, like PLCs or RTUs, to an Ethernet network, allowing them to communicate over IP. It essentially acts as a translator between two communication standards that otherwise couldn't interact directly.
2. What does a serial device server do?
It converts serial signals into Ethernet-ready data, enabling legacy serial equipment to join a modern network without hardware replacement. This keeps existing equipment operational while extending its reach across the broader network.
3. How does a serial device server connect serial devices to Ethernet?
It receives serial data through RS-232, RS-422, or RS-485 ports, then converts and transmits that data over an Ethernet connection. From there, the data becomes accessible to any system connected to that network.
4. How do I connect legacy serial devices to an Ethernet network?
A serial device server matched to your device's serial standard bridges the connection, allowing older hardware to communicate over Ethernet without modification. The right port count and protocol support make the difference between a smooth integration and ongoing compatibility issues.
5. What is the difference between RS-232, RS-422, and RS-485 serial device servers?
RS-232 suits short, point-to-point connections, RS-422 supports longer distances, and RS-485 allows multiple devices on a single line. Choosing the right one depends on your existing wiring and how many devices need to connect.
6. How do I choose the right serial device server?
Start with your device's serial interface, required port count, and network environment, then match those needs to a compatible model. A specialist can help confirm compatibility before you commit to a purchase, which avoids costly reordering later.
7. Can serial device servers be used with PLC and SCADA systems?
Yes. They're commonly used to bring serial-based PLCs and field devices into Ethernet-connected SCADA platforms for centralized monitoring. This allows facilities to modernize their visibility without replacing functioning field equipment.
