Products

Welcome to the Yanji industrial connectivity catalog. This page summarizes three core hardware families—DTU/RTU gateways for edge-to-cloud data transmission, Y301 I/O modules for field signal aggregation, and Y40x I/O sync modules for wireless remote control applications. Use it as a quick launchpad to dive into the detailed specifications and technical manuals under each series.

DTU & RTU Portfolio

Highlights

• Palm-sized Mini DTU (Y201) options for 4G, Wi-Fi, Ethernet, and LoRa uplinks while keeping legacy RS485/RS232 wiring intact.
• Standard DTU (Y202/Y204/Y208) models add multi-port serial fan-out plus industrial-grade power protection and watchdog redundancy.
• Built-in Modbus polling, JSON uplinks, MQTT/HTTP/TCP channel management, remote diagnostics, and firmware upgrade paths across the lineup.

MiniLink Capsule Series

MiniLink spans the Y201 mini DTUs (G/W/R/L) and the ultra-compact Y301-110/200/020 I/O blocks, engineered for rapid cabinet retrofits, OEM controllers, and edge panels:

• Unified 77 mm-class enclosure with dual mounting (DIN clip + panel ears) for consistent cabinet layout.
• Shared RS485/RS232 serial core paired with LTE, Wi-Fi, Ethernet, or LoRa uplinks so field crews can pick the optimal backhaul.
• Common Modbus-transparent firmware layer with JSON telemetry, remote diagnostics, and OTA/USB lifecycle tooling.

👉 For SKU comparison, wiring topologies, and AT/Modbus examples, see the MiniLink Series Guide.

DTU/RTU Family at a Glance

• Mini DTU (Y201): Palm-sized 4G/Wi-Fi/Ethernet/LoRa gateways keeping legacy serial wiring intact.
• Standard DTU (Y202/Y204/Y208): Multi-port fan-out with redundant watchdogs and hardened power domains.
• Tooling: Shared AT command set, Modbus polling-to-JSON pipeline, OTA/USB upgrade flow.

👉 Dive into model tables, pinouts, and manuals on the DTU & RTU index.

Y301 I/O Modules

Highlights

• Unified Modbus-RTU register philosophy across DI/DO/AI/AO variants with configurable addressing, baud rates, and automation rules.
• Opto-isolated inputs, relay/SPDT outputs up to 10 A, and optional analog conditioning for voltage, current, or pulse counting signals.
• Works with PLCs, and SCADA platforms for rapid deployment in HVAC, power, building automation, and OEM controls.

• Digital/analog mix-and-match: relay SKUs (220/222/440/444/880), compact single-function units (110/200/020/600/800), analog-focused models (00G/0004/0006/0008).
• One Modbus-RTU template across DI/DO/AI/AO variants with configurable addressing, pulse counting, and retention policies.
• Accessories, register maps, and wiring diagrams are consolidated on the Y301 I/O index.

Y40x I/O Sync Modules

Highlights

• Three distinct series for different communication scenarios: point-to-point (Y401), one-to-many (Y402), and mesh networking (Y403).
• Long-range wireless transmission up to 5000m with current LoRa technology in 398~525MHz frequency range.
• Future-ready platform with planned 4G connectivity support for expanded deployment options.
• Industrial-grade design with 9~36V DC power supply and -20°C to +85°C operating temperature.
• Plug-and-play operation with factory pre-paired devices and DIN rail mounting.

Series Comparison

Feature	Y401 Series	Y402 Series	Y403 Series
Communication Type	Point-to-point	One-to-many (Master-Slave)	Mesh networking (Linkage)
Device Pairing	2 devices (A & B)	1 Master + Multiple Slaves	Multiple nodes (unlimited)
Channel Options	1, 2, or 4 channels	1 or 4 channels per device	1 channel per node
Transmission Range	5000m (point-to-point)	5000m (point-to-point)	5000m + relay extension
Configuration	Factory pre-paired	Factory pre-paired, expandable	Self-organizing network
Applications	Simple remote control	Centralized control systems	Coordinated control systems

Y401 Series - Point-to-Point I/O Modules

• Pair-based operation: Each system consists of two devices (Device A & Device B) for bidirectional communication.
• Channel options: Available in 1DI/1DO (Y401-11-L), 2DI/2DO (Y401-22-L), and 4DI/4DO (Y401-44-L) configurations.
• Simple deployment: Ideal for straightforward remote control applications like automated water pumping, gate control, and alarm systems.

Y402 Series - One-to-Many I/O Systems

• Master-Slave architecture: One master controls multiple slaves for scalable system expansion.
• Flexible configurations: Available in 1DI/1DO (Y402-11-L), 4DI/4DO (Y402-44-L), and 4-to-1 channel mapping (Y402-4411-L) systems.
• Centralized management: Perfect for building automation, industrial equipment control, and multi-zone irrigation systems.

Y403 Series - Wireless Linkage Controllers

• Mesh networking: Automatic signal relay between nodes for extended coverage and obstacle penetration.
• Linkage control: Any node activation triggers all nodes for coordinated safety systems.
• Unlimited expansion: No limit on number of nodes, suitable for emergency stop systems and tunnel lighting control.

👉 For detailed specifications, wiring diagrams, and technical manuals, see the Y40x I/O Sync Modules index.