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Y202-W Standard Wi-Fi 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-W is the Wi-Fi-enabled model in the Yengear Y202 standard DTU family. It bridges two independent serial channels to Wi-Fi or Ethernet uplinks and supports transparent TCP, UDP, HTTP, and MQTT sockets, Modbus RTU to Modbus TCP conversion, JSON upload, remote AT, and watchdog protection.
With 5 to 36 VDC input, a dual-core 240 MHz MCU, and a compact DIN-rail-ready enclosure, Y202-W is well suited for retrofit cabinets where wiring space is limited but dual-serial access is required.
| Item | Description |
|---|---|
| MCU and Firmware | Dual-core 240 MHz MCU, RTOS, dual watchdog |
| Serial Ports | 2 x RS232 / RS485, selectable per port |
| Wireless | 802.11 b/g/n 2.4 GHz, AP / STA / AP+STA |
| Ethernet | 10/100Base-T RJ45, auto MDI/MDIX |
| Power Input | 5 to 36 VDC, 2-pin terminal or DC jack |
Highlights
- Dual serial channels with dual Socket contexts for simultaneous SCADA and cloud connections
- Flexible Wi-Fi uplink modes, AP / STA / AP+STA, for deployment, retrofit, and maintenance hotspot scenarios
- Integrated Modbus gateway, HTTP client, MQTT publisher, registration packet, and heartbeat
- Compact enclosure,
84 x 70 x 25 mm, with DB9 and pluggable terminal wiring for fast replacement
2. Ordering Information
2.1 Model Naming
Y202-W-XX
Y202: Dual-port DTU platformW: Wi-Fi plus Ethernet uplinkXX: Serial configuration,2H= dual RS232,4H= dual RS485,6H= mixed
2.2 SKU Matrix
| SKU | Serial Configuration | Typical Application |
|---|---|---|
| Y202-W-2H | 2 x RS232, DB9 plus terminal | Legacy PLC and HMI upgrade |
| Y202-W-4H | 2 x RS485 | Multi-drop metering and protection relays |
| Y202-W-6H | 1 x RS232 + 1 x RS485 | Mixed engineering projects and fieldbus access |
2.3 Standard Package
1 x Y202-W DTU
1 x DB9 male breakout for COM1
1 x 3-pin pluggable terminal for COM2 and power
1 x Wi-Fi SMA antenna
DIN-rail clip, quick-start card, warranty information
Optional: 12 V power adapter, USB console cable
3. Key Features
- Wi-Fi and Ethernet Flexibility: Switch between Wi-Fi AP, STA, AP+STA, and wired Ethernet while keeping the same Socket stack.
- Dual Socket per Port: Up to four concurrent data paths across two serial ports.
- Rich Protocol Set: Supports TCP, UDP, HTTP GET / POST / AUTO, MQTT, Modbus RTU to TCP, JSON upload, and peer-to-peer tunneling.
- Industrial Design:
5 to 36 VDCinput with reverse-polarity protection, EFT / ESD hardening, Reload button, and dual watchdog reset. - Tool-Free Debugging: Built-in Web UI with default AP
HY-W502, default IP192.168.4.1, andadmin/adminlogin. - Remote Lifecycle Support: HTTP OTA, parameter backup and restore, remote AT, and programmable no-data reboot.
4. Technical Specifications
4.1 Electrical and Environmental
| Parameter | Specification |
|---|---|
| Supply Voltage | 5 to 36 VDC, terminal or 5.0 mm DC jack |
| Typical Current | 55 mA @ 12 V, Wi-Fi idle |
| Operating Temperature | -40 to 85 C |
| Humidity | 5 to 95% RH, non-condensing |
| Protection | Reverse polarity, surge clamping, dual watchdog |
| MTBF | >200,000 h, calculated |
4.2 Serial and Uplink Capability
| Parameter | Specification |
|---|---|
| Serial Ports | 2 x RS232 / RS485, depending on SKU |
| Wi-Fi | AP / STA / AP+STA |
| Ethernet | 10/100Base-T RJ45 |
| Socket Channels | Socket A and B per serial port |
4.3 Software Functions
| Item | Description |
|---|---|
| Protocols | TCP / UDP / HTTP / MQTT |
| Gateway Function | Modbus RTU to Modbus TCP |
| Maintenance | Web UI, LAN discovery, micro-USB console, remote AT |
| Value-Added Functions | JSON uploader, registration packet, heartbeat, HTTP OTA |
5. Interfaces and Indicators
| Interface / Indicator | Description |
|---|---|
| COM1 / COM2 | Dual serial interfaces for field device access |
| Wi-Fi Antenna | External SMA antenna |
| RJ45 | Ethernet uplink and local maintenance |
| Power Terminal / DC Jack | Wide-range power input |
| Status LEDs | Power, Wi-Fi status, link, and data activity |
| Reset / Reload | Parameter recovery and maintenance |
6. Mechanical and Installation
- Compact enclosure,
84 x 70 x 25 mm - DIN-rail-ready housing for cabinet retrofit
- DB9 plus pluggable terminal combination simplifies field wiring and replacement
7. Application Notes
- Dual-device wireless retrofit: Bring two serial devices online through Wi-Fi without adding extra Ethernet cabling.
- SCADA plus cloud upload: Use separate Socket channels for local monitoring and cloud reporting.
- Maintenance hotspot access: Use AP or AP+STA mode for convenient local commissioning in the field.
- 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