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Y202-R Standard Ethernet DTU Specification
Reference: Technical manual coming soon. Related: Serial Gateway Overview
Contents
- Overview
- Ordering Information
- Key Features
- Technical Specifications
- Interfaces and Indicators
- Mechanical and Installation
- Application Notes
1. Overview
Y202-R is the dual-port Ethernet model in the Yengear standard DTU family. It integrates two independent serial channels, each configurable as RS232 or RS485, together with a 10/100Base-T Ethernet uplink. Each serial channel maps to Socket A and B, enabling concurrent TCP, UDP, HTTP, or MQTT data paths as well as Modbus RTU to Modbus TCP conversion.
It is designed for control cabinets that require reliable IP access to PLCs, meters, protection relays, and other legacy serial devices without changing field wiring.
| Item | Description |
|---|---|
| MCU and Firmware | Dual-core 240 MHz MCU, RTOS scheduler, dual watchdogs |
| Serial Ports | 2 x RS232 / RS485, software-selectable combination |
| Ethernet Uplink | 10/100Base-T RJ45, static IP or DHCP |
| Power Input | 9 to 36 VDC terminal input, optional DC barrel input |
| Mounting | DIN-rail enclosure with removable terminal block |
Highlights
- Two independent serial buses, each with dual Socket contexts for concurrent SCADA and cloud access
- Industrial EMC design and
9 to 36 VDCpower input for substation and HVAC cabinets - Built-in browser console with default address
192.168.10.8, loginadmin/admin - Consistent standard DTU firmware stack with registration packets, NET/UART heartbeat, HTTP OTA, and remote AT access
2. Ordering Information
2.1 Model Naming
Y202-R-XX
Y202: Dual-port DTU platformR: Ethernet uplink through RJ45XX: Serial combination, for example2H= dual RS232,4H= dual RS485,6H= 1 x RS232 + 1 x RS485
2.2 SKU Matrix
| SKU | Serial Configuration | Typical Application |
|---|---|---|
| Y202-R-2H | 2 x RS232 | Legacy PLC and HMI retrofit |
| Y202-R-4H | 2 x RS485 | Multi-drop metering and protection relays |
| Y202-R-6H | 1 x RS232 + 1 x RS485 | Mixed engineering projects with fieldbus devices |
2.3 Standard Package
1 x Y202-R DTU
1 x DB9 breakout for COM1
1 x pluggable terminal for COM2 and power
DIN-rail clip, quick-start card, warranty information
Optional: 12 V power adapter, USB console cable
3. Key Features
- Dual Serial Channels: Two isolated serial channels, each with Socket A and B for concurrent service access.
- Broad Protocol Support: Supports TCP, UDP, HTTP client, MQTT client, and Modbus RTU to Modbus TCP conversion.
- Industrial-Grade Power:
9 to 36 VDCinput with watchdog protection for unattended operation. - Browser-Based Configuration: Built-in Web UI for IP settings, serial settings, and protocol management.
- Data Enhancement Functions: Supports registration packets, heartbeat packets, auto reconnect, and remote AT.
4. Technical Specifications
4.1 Electrical and Hardware
| Parameter | Specification |
|---|---|
| Processor | Dual-core 240 MHz MCU |
| Power Input | 9 to 36 VDC, terminal input, optional DC barrel |
| Protection | Industrial EMC design, dual watchdog |
| Mounting | DIN-rail industrial enclosure |
4.2 Serial and Network
| Parameter | Specification |
|---|---|
| Serial Ports | 2 x RS232 / RS485, selectable by SKU |
| Ethernet | 10/100Base-T RJ45 |
| IP Mode | Static IP / DHCP |
| Socket Channels | Socket A and B for each serial port |
4.3 Software Functions
| Item | Description |
|---|---|
| Protocols | TCP / UDP / HTTP / MQTT |
| Gateway Function | Modbus RTU to Modbus TCP |
| Maintenance | Web UI, remote AT, HTTP OTA |
| Value-Added Functions | Registration packet, NET/UART heartbeat, reconnect logic |
5. Interfaces and Indicators
| Interface / Indicator | Description |
|---|---|
| COM1 / COM2 | Dual serial interfaces for RS232 or RS485 field devices |
| RJ45 | Ethernet uplink for LAN or SCADA network |
| Power Terminal | Wide-range DC input |
| Status LEDs | Power, link, and data activity indication |
| Reload Button | Used for parameter recovery and maintenance |
6. Mechanical and Installation
6.1 Dimension Drawings
Standard interface version:
Dual RS485 version:
These drawings can be used for cabinet cutout and installation clearance planning for the corresponding Y202-R interface version.
- Standard DIN-rail enclosure for direct cabinet installation
- Removable terminal blocks simplify field wiring and replacement
- Recommended for retrofit cabinets where two independent serial buses must be retained
7. Application Notes
- Dual-device cabinet retrofit: Connect two PLCs, meters, or relays to a single Ethernet uplink.
- SCADA plus cloud architecture: Use Socket A and B to separate local SCADA and cloud telemetry.
- Modbus gateway deployment: Convert Modbus RTU field devices to Modbus TCP for upper-layer systems.
- Manufacturer: Hunan YenGear Tech Co., Ltd.
- Address: Room 21014, Building 1, Fudi Xingguang Tiandi, Yingxin Road, Yuhua District, Changsha, Hunan, China
- Email: hi@yengear.com
- Website: www.yengear.com