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Y402-44-L LoRa Wireless I/O System Specification
Table of Contents
- Overview
- System Components
- Key Features
- Technical Specifications
- Interface & Pin Description
- Mechanical & Environmental
- Pairing Configuration
- Installation & Wiring
- Important Notes
- Ordering Information
1. Overview
The Y402-44-L is a one-to-many wireless switch transmission system composed of two types of modules: Master Y402-44-L-M and Slave Y402-44-L-S. Based on LoRa modulation technology, this system enables remote transmission of digital signals between one master device and multiple slave devices. Both master and slave devices feature 4-channel inputs and outputs, supporting one-to-many and many-to-one communication scenarios.
System Architecture
- Master-Slave Configuration: One master communicates with multiple slaves
- Quad-Channel Support: 4 independent input/output channels per device
- Bidirectional Communication: Master-to-slave and slave-to-master signal transmission
- Scalable System: Add additional slaves as needed
- No Operating Costs: No SIM cards or subscription fees required
- Encrypted Transmission: Secure signal transmission
Working Principle
Master to Slave Transmission: When the master device collects switch signals from any of its 4 inputs, it transmits wirelessly to all slave devices in the system, causing their corresponding relay outputs to change accordingly.
Slave to Master Transmission: When one or more slave devices have their inputs shorted, the master device's corresponding output status changes, enabling slave-to-master signal transmission.
2. System Components
2.1 Master Device (Y402-44-L-M)
- Role: Central control unit with 4 channels
- Function: Broadcasts signals to all slaves, receives signals from any slave
- Channels: 4 independent input/output channels
- Dimensions: 88mm × 85mm × 59mm
- Weight: Approx. 100g
2.2 Slave Device (Y402-44-L-S)
- Role: Remote terminal unit with 4 channels
- Function: Receives master signals, transmits individual status to master
- Channels: 4 independent input/output channels
- Dimensions: 88mm × 85mm × 59mm
- Weight: Approx. 100g
2.3 System Configuration
- Basic System: 1 Master + 1 Slave (factory pre-paired)
- Expanded System: 1 Master + Multiple Slaves (user configurable)
- Maximum Range: 5000 meters in open areas
- Channel Mapping: Corresponding channels communicate between devices
3. Key Features
- Quad-Channel Architecture – 4 independent channels per device for complex control
- One-to-Many Control – Single master controls multiple slaves simultaneously
- Wireless Range – Up to 5000 meters transmission distance in open areas
- Bidirectional Communication – Master-to-slave and slave-to-master transmission
- Wide Voltage Input – 9~36V DC power supply with reverse polarity protection
- Quad Relay Outputs – 4 SPDT relays supporting AC 250V/5A or DC 28V/5A each
- Universal Inputs – Supports both NPN signals and dry contact switches
- Status Indicators – Individual LEDs for each channel showing working status, connection, input, and output
- Industrial Design – Hardware watchdog for high reliability, 35mm DIN rail mounting
- Obstacle Penetration – Signals can penetrate obstacles and avoid interference
- Encrypted Transmission – Secure signal transmission for reliability
- Zero Operating Costs – No SIM cards or subscription fees
4. Technical Specifications
4.1 Wireless Parameters (Common)
| Parameter | Specification |
|---|---|
| Communication Method | LoRa communication |
| Frequency Band | 398~525MHz |
| Transmission Distance | 5000m (open area) |
| Antenna Interface | SMA connector (external thread, internal hole) |
| Standard Antenna | 470MHz antenna |
4.2 Electrical Parameters (Common)
| Parameter | Specification |
|---|---|
| Supply Voltage | 9~36V DC |
| Max Power Consumption | 2.5W |
| Input Channels | 4 channels, NPN input and dry contact switch |
| Output Channels | 4 channels, AC 250V 5A / DC 28V 5A each |
| Operating Temperature | -20°C ~ +85°C |
| Operating Humidity | 10~90% RH (non-condensing) |
4.3 Mechanical Parameters (Common)
| Item | Specification |
|---|---|
| Dimensions | 88mm × 85mm × 59mm |
| Weight | Approx. 100g |
| Mounting | Standard 35mm DIN rail or screw mounting |
5. Interface & Pin Description
5.1 Interface Overview (Common)
| Interface | Description |
|---|---|
| Antenna | SMA interface for LoRa magnetic or rod antenna |
| Power | DC 9~36V input with reverse polarity protection |
| Input | 4-channel passive switch input with input terminals and common terminals |
| Output | 4-channel relay output with normally open, common, and normally closed terminals |
5.2 LED Indicators (Common)
| LED Name | Function | Status Description |
|---|---|---|
| Power | System working indicator | Constantly lit when system is running |
| Link | Connection status indicator | Constantly lit when connection is established |
| Input N (N=1~4) | Channel N input indicator | Lit when input N and common N are shorted |
| Output N (N=1~4) | Channel N output indicator | Lit when output common N and normally open N conduct |
6. Mechanical & Environmental
| Item | Specification |
|---|---|
| Dimensions | 88 × 85 × 59 mm |
| Mounting | 35 mm DIN rail clip or screw mounting (M3×10 self-tapping screws recommended) |
| Protection | IP20 |
| Enclosure | Flame-retardant plastic housing |
| Weight | 100g |
7. Pairing Configuration
7.1 Factory Default
- Master and slave devices are pre-paired at the factory
- No configuration required for basic operation
- One master and one slave work out of the box
7.2 Adding Additional Slaves
When adding more slaves to the system:
- Purchase additional slave devices (Y402-44-L-S)
- Electrical connection: Connect 2 power wires and 3 communication wires
- Power supply: Apply 9~36V DC power to both master and slave
- Auto-configuration: Wait approximately 20 seconds for pairing
- Verification: Connection LEDs on both devices should be constantly lit
- Disconnect: Remove the 3 communication wires after successful pairing
Troubleshooting: If connection LEDs don't light within 30 seconds, power off, check wiring, and retry.
8. Installation & Wiring
8.1 Input Connection
For mechanical switches (self-locking switches, float switches, relay outputs):
- Connect directly to device input terminals without any voltage
For NPN signals:
- Connect NPN emitter to common terminal
- Connect NPN collector to input terminal
- Do not connect NPN signals to other power sources
For active signals:
- Use intermediate relays to convert active signals to passive signals
- Then connect to device input terminals
8.2 Output Connection
For direct load control (up to 1kW resistive loads per channel):
- Connect load directly in series with the device
For high-power applications (above 1kW):
- Use AC contactors for power switching
- Refer to wiring diagrams for proper connection
8.3 Installation Guidelines
- Install antennas in open areas, vertically positioned ~2 meters above ground
- Keep antennas away from large metal equipment
- Ensure antenna connectors are tightly secured
- Use only the provided antennas for optimal performance
- Mount devices on 35mm DIN rails or use screw mounting in electrical cabinets
- Maintain proper clearance for ventilation and wiring
9. Important Notes
- Communication Type – This is a half-duplex communication device. Not suitable for applications requiring high real-time performance in complex environments.
- Frequency Range – Product operates at 398~525MHz. Use only provided antennas for optimal performance.
- Antenna Installation – Ensure tight antenna connections, place antennas in open areas, position vertically ~2 meters high, and keep away from large metal equipment.
- System Expansion – Additional slaves can be added to expand the system as needed.
- Device Safety – Follow all instructions in the manual for proper setup and operation.
- Power Requirements – Use proper voltage range (9~36V DC). Low voltage may prevent startup; high voltage may damage the device.
10. Ordering Information
10.1 Model Naming
- Y402-44-L-M: Master device (4 channels)
- Y402-44-L-S: Slave device (4 channels)
10.2 Package Options
| SKU | Description |
|---|---|
| Y402-44-L-Kit | 1 Master + 1 Slave (starter kit) |
| Y402-44-L-S | Additional slave device (expansion) |
- Manufacturer: Hunan Yanji Tech Co.,Ltd
- Address: Room 21014, Unit 1, Fudixingguang plaza, Yuhua district Yingxin road, Changsha, Hunan, P.R. China
- Email: hi@yanjiiot.com
- Website: www.yanjiiot.com