Y401 / Y402 / Y403 Application Guide

The Y40x series LoRa wireless I/O modules are industrial-grade devices developed for long-distance, low-power, and wiring-free control. They support transmission up to 5 km in open areas and use mesh self-networking to enable multi-node wireless linkage. No SIM card or subscription is required.

Series	Architecture	Typical Use
Y401	Point-to-point (A ↔ B)	Simple bidirectional control between two fixed points
Y402	One-to-many (Master ↔ Slaves)	One central controller driving multiple remote points
Y403	Mesh network (multi-node linkage)	Multi-point coordinated control with automatic relay extension

Y401 / Y402 / Y403 models support passive dry-contact and NPN open-collector DI inputs, use SPDT relay outputs, operate on 9-36 VDC, and mount on 35 mm DIN rail. Do not apply voltage directly to DI terminals.

Y401-11-L	Y402-11-L	Y403-11-L
Point-to-point	One-to-many	Mesh network

Key Features

Feature	Description
Long-range transmission	Up to 5 km in open areas
Low power consumption	Supports solar power supply
Mesh self-networking	Automatic relay and coverage expansion
Industrial-grade housing	Waterproof and dustproof IP rating
Protocol	Modbus RTU for easy PLC integration

Typical Application Case: Smart Aquaculture

Project Background

A large South American white shrimp farm faced three major challenges:

• High labor costs and low efficiency from multiple daily manual inspections across many ponds.
• Large fluctuations in dissolved oxygen, pH, water temperature, and ammonia levels, leading to frequent stress, disease outbreaks, and high mortality.
• Inability to detect equipment failures (aerators, pumps, valves) or environmental anomalies in time, often resulting in major losses.

YenGear Solution

• Deployed Y403-11-L LoRa wireless linkage controllers to achieve one-button group control and full-network synchronous linkage of aerators, water pumps, and valves across multiple ponds.
• Used Y201-LLoRa wireless transceivers for long-range data collection.
• Integrated water quality sensors and built a cloud platform for real-time App / PC remote monitoring and intelligent alerts.

Project Results

• Shrimp survival rate improved significantly and mortality losses reduced.
• Early warning for water quality abnormalities enabled timely intervention.
• Inspection frequency dropped sharply, achieving efficient remote unmanned management.
• Automatic linkage of aerators and pumps reduced energy consumption.

Customer feedback: "24/7 wireless monitoring and synchronous control with no blind spots—plug-and-play."

Recommended Models

Requirement	Recommended Model
Single pond, one aerator + one pump	Y401-11-L (point-to-point)
One control room + multiple ponds	Y402-11-L or Y402-44-L (one-to-many)
Multi-pond synchronized linkage	Y403-11-L (mesh, with relay extension)

Other Applicable Scenarios

Scenario 1: Smart Agriculture / Greenhouses

• Remote control of fans, water pumps, and irrigation valves.
• Data collection for temperature, humidity, soil moisture, CO₂, etc.
• Automatic alerts for abnormal conditions.

Value: Significantly reduces wiring, lowers deployment costs, and enables remote management via mobile phones.

Recommended models:

Requirement	Recommended Model
Two zones, one-to-one control	Y401-44-L (4-channel point-to-point)
One cabinet controlling multiple zones	Y402-44-L (4-channel one-to-many)
Emergency stop across all zones	Y403-11-L (mesh, any-trigger-all)

Scenario 2: Remote Pump Stations / Water Treatment

• Remote start / stop control of water pumps.
• Real-time monitoring of water level and pressure.
• Unmanned pump house monitoring.

Value: Solves wiring difficulties in remote areas and reduces manual inspection costs.

Recommended models:

Requirement	Recommended Model
Two-point pump control	Y401-11-L (point-to-point)
One station + multiple pumps	Y402-44-L (one-to-many)
Distributed relay extension	Y403-11-L (mesh)

Scenario 3: Smart Construction Sites / Temporary Power Supply

• Distribution box status monitoring.
• Equipment operation and safety monitoring.
• Integration with Y901 alarm for full-network emergency alerts.

Value: Enhances power safety on construction sites and meets smart site construction requirements.

Recommended models:

Requirement	Recommended Model
Two-point safety interlock	Y401-11-L (point-to-point)
One site office + multiple distribution boxes	Y402-11-L (one-to-many)
Full-site emergency stop mesh	Y403-11-L (mesh, any-trigger-all)

Scenario 4: Livestock Farming

• Monitoring of breeding environment (temperature, humidity, harmful gases).
• Automatic control of ventilation and feeding equipment.
• Instant alerts for abnormal conditions.

Value: Reduces nighttime inspections and enables precision farming management.

Recommended models:

Requirement	Recommended Model
Two-shed environment control	Y401-22-L (2-channel point-to-point)
One controller + multiple sheds	Y402-44-L (one-to-many)
Full-farm emergency ventilation	Y403-11-L (mesh, any-trigger-all)

Scenario 5: Tunnel and Industrial Infrastructure

• Monitoring of tunnels, pipe galleries, and underground pipelines.
• Remote monitoring of distant base stations and signal towers.
• Landslide and forest fire early warning.

Value: Provides long-distance wireless control and monitoring without cabling across harsh terrain.

Recommended models:

Requirement	Recommended Model
Two-end tunnel control	Y401-11-L (point-to-point)
One control room + multiple tunnel segments	Y402-11-L (one-to-many)
Full-length mesh emergency linkage	Y403-11-L (mesh, required)

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Quick Selection Reference

Scenario	Topology	Recommended Series
Aquaculture multi-pond linkage	Mesh	Y403
Greenhouse zone control	One-to-many	Y402
Irrigation field valves	Point-to-point / Mesh	Y401 or Y403
Tunnel emergency stop	Mesh	Y403

For detailed I/O counts, relay ratings, and wiring diagrams, see the Y4xx Selection Guide or the individual product specification pages.

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• Manufacturer: Hunan YenGear Tech Co., Ltd.
• Email: [email protected]
• Website: www.yengear.com