Final configuration is confirmed in the quotation.
RS485 to Ethernet Gateway / Serial Server
Connect RS485, RS232 or RS422 field devices to Ethernet with 1-, 2- or 8-port serial-server options for Modbus bridging and direct IP communication.
Start with the information you have. Exact model, interface and certificates are confirmed in writing before order.
Image details
Representative serial-server family visual derived from reviewed exact-family catalogue references and independently de-identified. It is not the final ordered-model photograph; serial-port count, interface, Ethernet speed, protocol role, power option, enclosure and certificates are confirmed in the quotation.
Related solution: Equipment Monitoring
Where the hardware sits in the monitoring path
A planning view, not a fixed bundle. Signal type, protocol, power, network and the customer endpoint are confirmed before quotation.
Field hardware
Wireless Split-Core CT Current Sensor Family
Customer system
SCADA, BMS or customer-owned platform
Specifications
- Serial ports
- 1, 2 or 8 ports, selected by configuration
- Serial interfaces
- RS485 / RS232 / RS422 family options
- Ethernet
- 10M or 10/100M, depending on family
- Protocol role
- Modbus RTU / Modbus TCP gateway
- Network modes
- TCP / UDP / HTTP / MQTT on documented variants
- Power
- DC 8–28 V common; PoE or AC on applicable variants
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How the model is selected
The written quotation ties the site requirement to one reviewed hardware configuration.
Site requirement
Application, medium, mounting and environment
Hardware configuration
Signal, protocol, power and enclosure
Quote confirmation
Model, quantity, certificates and delivery
Machine monitoring context
Representative site context. Sensors, interfaces, enclosure, power and mounting are confirmed against the actual project before quotation.
Choose the configuration, not just the enclosure
The reviewed catalogue covers several related serial-server families. These limits prevent features from being carried from one variant to another.
- Single-port, 2-port and 8-port configurations are available; the ordered serial-port count must be selected before quotation.
- Basic single-port families use 10M Ethernet. High-performance and multi-port families use 10/100M Ethernet.
- RS485, RS232 and RS422 are family interface choices. They are not presented as simultaneous interfaces on every unit.
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Model-selection reference
Industrial Monitoring Hardware Catalog
Use this audited section to compare available hardware configurations. The representative website image is not an exact model photograph; the ordered configuration is confirmed in the quotation.
- Catalog section
- RS485, Ethernet and cellular communication gateways
- SG-coded options
- 12
- PDF pages
- 22–23
Continue product selection
Compare adjacent hardware families for the same monitoring path. The final combination is checked against the project I/O, protocol, power and enclosure requirements.
How to choose
- Count independent serial loops first. One, two and eight-port families are available, and separate baud rates or framing settings may require separate ports.
- Confirm whether each serial line uses RS485, RS232 or RS422, plus baud rate, parity, stop bits, device addresses and termination.
- Define the Ethernet-side role: transparent TCP or UDP transport, Modbus RTU-to-TCP gateway, HTTP, or MQTT on a documented variant.
- Estimate device count, register count, polling interval, timeout and retry behavior before the pilot.
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Compatible with
- RS485, RS232 or RS422 field devices, selected by configuration
- Modbus RTU devices and Modbus TCP clients or servers
- Ethernet networks using TCP or UDP
- HTTP or MQTT applications on documented family variants
Typical package
- Selected 1-, 2- or 8-port serial-server configuration
- DC power supply or the applicable PoE / AC option
- Serial wiring, termination and Ethernet patching
- IP plan, serial settings, register map and commissioning test
Applications
Use this family when installed serial devices need a direct Ethernet path without replacing the PLC, meter, sensor or controller. Select the port count, serial interface, Ethernet speed and protocol role from the actual field wiring and upstream system.
- Bridge Modbus RTU devices to Modbus TCP
- Tunnel serial data over TCP or UDP
- Separate multiple serial loops with 2- or 8-port configurations
- Use HTTP or MQTT on the family variants that document those functions
What to include in your quote request
- Serial interface, independent loop count and device count per loop
- Baud rate, parity, stop bits, addresses and register list
- Required Ethernet role: transparent TCP / UDP, Modbus TCP, HTTP or MQTT
- Ethernet speed, IP plan, firewall and commissioning ownership
- Power option, enclosure / mounting, destination country, quantity and project stage
Related selection guides
Related resources
Frequently asked questions
What does an RS485 to Ethernet gateway do?
It connects an installed serial device or serial bus to an IP network. Depending on the selected configuration, it can tunnel serial data over TCP or UDP or bridge Modbus RTU devices to Modbus TCP.
How many serial ports are available?
The reviewed family includes 1-port, 2-port and 8-port configurations. Share the number of independent serial loops, devices per loop and serial settings so the correct option can be selected.
Does it support Modbus RTU and Modbus TCP?
Yes. Modbus RTU/TCP gateway operation is part of the reviewed family scope. The device role, register workload, polling behavior and timeout settings still need to be confirmed for the project.
Does every configuration support MQTT or HTTP?
No. HTTP and MQTT are documented on selected families, not every enclosure or interface option. State the required upstream protocol in the RFQ so the quotation can name the matching configuration.
Is this the same as an edge IoT gateway?
No. This family is intended for direct serial-to-Ethernet conversion and Modbus bridging. Use an edge IoT gateway when the project needs broader protocol handling, cellular backhaul, local processing or a reviewed outage queue.
Does this family include BACnet?
BACnet is not part of the approved public facts for this family. If the BMS requires BACnet, include the BACnet object and version requirements in the RFQ so a separately verified gateway can be selected.
What should I provide when requesting a quote for the RS485 to Ethernet Gateway / Serial Server?
Serial interface, independent loop count and device count per loop; Baud rate, parity, stop bits, addresses and register list; Required Ethernet role: transparent TCP / UDP, Modbus TCP, HTTP or MQTT; Ethernet speed, IP plan, firewall and commissioning ownership
Where can I compare available model options?
Open the Industrial Monitoring Hardware Catalog linked on this page. It lists audited SG-coded selections; the ordered configuration is confirmed in the quotation.
Will it work with my existing system?
Compatibility is reviewed against your field signals, protocols and upstream platform. Typical pairings include RS485, RS232 or RS422 field devices, selected by configuration, Modbus RTU devices and Modbus TCP clients or servers, Ethernet networks using TCP or UDP.