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.
Best Fit
- 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.
Key Specifications
| Serial Ports | 4 x RS232 / RS485 |
| Ethernet | 10/100Base-T RJ45, static IP or DHCP |
| Processor | Dual-core 240 MHz MCU |
| Power | 9 to 36 VDC terminal, optional 12 V barrel input |
| Mounting | DIN-rail industrial enclosure |
Selection Tip
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.
