Y204-R 4-Port Serial to Ethernet Converter
Y204-R is a four-port Ethernet DTU for projects where several serial devices need to share one network uplink without losing independent port control.
- Channels
- 4 independent serial ports; Socket A and B per port
- Interfaces
- 4 × RS232 / RS485; 10/100Base-T RJ45
- Protocols
- TCP, UDP, HTTP, MQTT; Modbus RTU-to-TCP gateway
- Power supply
- 9–36 VDC terminal; optional 12 V barrel
Price for the selected configuration.
Shipping & Tax: Shipping is quoted separately and paid before dispatch. Import duties, taxes, customs fees and destination charges are paid by the customer.
Overview
Y204-R is a four-port Ethernet DTU for projects where several serial devices need to share one network uplink without losing independent port control. It is commonly used in control cabinets that have several meters, PLCs, inverters or protection devices and need cleaner IP access for SCADA, MES or cloud systems.
Typical applications
- Cabinets with four RS232 or RS485 devices.
- Serial device consolidation without adding four separate converters.
- Modbus RTU field devices that need Modbus TCP access.
Key Features
- 4 independent serial channels, available as RS232 or RS485 variants.
- Socket A and B for each port, suitable for parallel OT and IT data paths.
- TCP, UDP, HTTP, MQTT and Modbus RTU to Modbus TCP conversion.
- Web UI and AT command support for installation and service work.
- Wide-range DC input with watchdog protection for unattended cabinets.
How it works & selection
Selection notes
Use Y204-R when four devices must remain as four separate serial channels. If you only need one device online, choose Y201-R; if the cabinet is already close to eight channels, Y208-R will be cleaner.
Technical specifications
| Channels | 4 independent serial ports; Socket A and B per port |
|---|---|
| Interfaces | 4 × RS232 / RS485; 10/100Base-T RJ45 |
| Protocols | TCP, UDP, HTTP, MQTT; Modbus RTU-to-TCP gateway |
| Power supply | 9–36 VDC terminal; optional 12 V barrel |
Signals and communication
| Product type / topology | 4-port serial-to-Ethernet DTU |
|---|---|
| Channels | 4 independent serial ports; Socket A and B per port |
| System configuration | 4 RS232 or 4 RS485 variants |
| Interfaces | 4 × RS232 / RS485; 10/100Base-T RJ45 |
| Protocols | TCP, UDP, HTTP, MQTT; Modbus RTU-to-TCP gateway |
| Functions | Web UI, remote AT, registration and heartbeat, JSON upload, and HTTP OTA. |
Electrical
| Power supply | 9–36 VDC terminal; optional 12 V barrel |
|---|
Mechanical and environment
| Mounting | DIN-rail industrial enclosure |
|---|---|
| Protection | EMC hardening; hardware and software watchdog |
