Y402-44-L LoRa Wireless I/O System Datasheet

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Y402-44-L Master	Y402-44-L Slave

Contents

1. Overview
2. Ordering Information
3. Key Features
4. Technical Specifications
5. Interfaces and Indicators
6. Mechanical and Environmental
7. Installation and Wiring
8. Important Notes

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1. Overview

The Y402-44-L is a four-channel one-to-many wireless I/O system based on LoRa modulation. It includes a master unit (M) and one or more slave units (S). One master can communicate with multiple slaves, and all four channels operate independently for scalable field control.

Operating Logic

• Master to slave: when master DI1 is closed, DO1 on all slave units energizes; the same logic applies to DI2 to DI4
• Slave to master: when DI1 on any slave is closed, DO1 on the master energizes; the same logic applies to DI2 to DI4
• The corresponding output on the master resets only after the same channel on all slave units returns to open
• Four independent channels with bidirectional transmission

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2. Ordering Information

System Components

Device	Model	Role	Channels	Dimensions
Master	Y402-44-L	Central control unit	4DI/4DO	88 x 72 x 59 mm
Slave	Y402-44-L	Remote terminal unit	4DI/4DO	88 x 72 x 59 mm

System configuration:

• Basic system: 1 master + 1 slave (factory paired)
• Expanded system: 1 master + N slaves

Model Naming and Package

Model Naming

Y402-44-L
  |   |  `-- L: LoRa wireless communication
  |   `----- 44: 4DI/4DO configuration
  `--------- Y402: one-to-many wireless I/O system series

Package Contents

Qty.	Item
1	Y402-44-L master module
1	Y402-44-L slave module
2	470 MHz magnetic-mount antennas
2	DIN rail clips
1	Quick reference guide
1	Warranty card

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3. Key Features

1. Four-channel control - Four independent channels with no cross-interference
2. One-to-many architecture - One master controls multiple slave units
3. Long-range communication - Up to 5000 m in open area
4. Bidirectional transmission - Supports master-to-slave and slave-to-master signaling
5. Scalable system - Additional slave units can be added as required
6. Wide supply range - 9 to 36V DC with reverse-polarity protection
7. Relay output - 4 x SPDT relays, rated at AC 277V 5A / DC 28V 5A
8. Universal DI - Supports dry contact and NPN inputs
9. Status indication - LEDs for power, link, input, and output status
10. Industrial design - Hardware watchdog and 35 mm DIN rail mounting

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4. Technical Specifications

Wireless

Parameter	Specification
Frequency band	398 to 525 MHz
Communication range	5000 m (open area)
Antenna connector	SMA
Standard antenna	470 MHz magnetic-mount antenna

Electrical

Parameter	Specification
Supply voltage	9 to 36V DC
Max. power consumption	2W (master) / 1.5W (slave)
Input channels	4 x NPN signal / dry contact
Output channels	4 x SPDT relay
Output rating	AC 277V 5A / DC 28V 5A
Operating temperature	-20 to +85 degC
Operating humidity	10% to 90% RH, non-condensing

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5. Interfaces and Indicators

Interface Summary (Master and Slave)

Interface	Description
Antenna	SMA connector for LoRa antenna
Power	DC 9 to 36V input with reverse-polarity protection
Input	4 x passive switch input (DI + COM)
Output	4 x relay output (NO + COM + NC)

LED Indicators

LED	Function	Status
Power	System status	On after power-up
Link	Link status	On when the wireless link is established
Input 1 to 4	Input status	On when the corresponding DI is closed
Output 1 to 4	Output status	On when the corresponding relay is energized

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6. Mechanical and Environmental

Mechanical Specifications

Parameter	Master	Slave
Dimensions	88 x 72 x 59 mm	88 x 72 x 59 mm
Weight	Approx. 50 g	Approx. 50 g
Mounting	35 mm DIN rail	35 mm DIN rail
Protection rating	IP20	IP20
Housing material	Flame-retardant plastic	Flame-retardant plastic

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7. Installation and Wiring

Input Wiring

Mechanical switches (maintained switch, float switch, relay contact):

• Connect directly between DI and COM
• No external power supply is required

NPN signal:

• Emitter -> COM
• Collector -> DI
• Do not connect an external voltage source to the input terminal

Output Wiring

Direct load (<= 1 kW resistive load):

• Wire the load in series with the relay output

High-power load (> 1 kW):

• Use an AC contactor or external power relay

Installation Notes

1. Install the antenna vertically in an open area, about 2 m above ground.
2. Keep the unit away from large metal structures.
3. Tighten the antenna connector securely.
4. Mount the unit inside the control cabinet on a 35 mm DIN rail.
5. Place the master near the center of the coverage area whenever possible.
6. Leave enough space for ventilation.

System Expansion

To add a new slave unit:

1. Power on the new slave.
2. Pair it using the pairing button.
3. The system will recognize and add the device automatically.

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8. Important Notes

1. Communication mode - Half-duplex communication, not intended for hard real-time control.
2. Frequency range - Recommended operating range is 398 to 525 MHz. Performance may degrade outside this range.
3. Antenna placement - Install the antenna vertically in an open area and keep it away from metal obstructions.
4. Master/slave topology - Only one master unit is allowed in each system, while multiple slave units are supported.
5. Channel isolation - The four channels operate independently without mutual interference.

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• 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