Y402-11-L LoRa Wireless I/O System Datasheet

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Y402-11-L Master	Y402-11-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 Y402-11-L is a one-to-many wireless I/O system based on LoRa modulation. It consists of a master unit (M) and one or more slave units (S). One master can communicate with multiple slaves for scalable field deployment. A basic master/slave set is factory paired and ready to use.

Operating Logic

• Master to slave: when the master DI is closed, the DO on all slave units energizes
• Slave to master: when the DI on any slave is closed, the DO on the master energizes
• The master output resets only after the DI on all slave units returns to open
• Bidirectional signal transmission with expandable topology

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2. Ordering Information

System Components

Device	Model	Role	Dimensions
Master	Y402-11-L	Central control unit	88 x 72 x 59 mm
Slave	Y402-11-L	Remote terminal unit	88 x 37 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

Y402-11-L
  |   |  `-- L: LoRa wireless communication
  |   `----- 11: 1DI/1DO configuration
  `--------- Y402: one-to-many wireless I/O system series

Package Contents

Qty.	Item
1	Y402-11-L master module
1	Y402-11-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. One-to-many architecture - One master controls multiple slave units
2. Long-range communication - Up to 5000 m in open area
3. Bidirectional transmission - Supports master-to-slave and slave-to-master signaling
4. Scalable system - Additional slave units can be added as required
5. Wide supply range - 9 to 36V DC with reverse-polarity protection
6. Relay output - SPDT relay, rated at AC 277V 5A / DC 28V 5A
7. Universal DI - Supports dry contact and NPN inputs
8. Status indication - LEDs for power, link, input, and output status
9. Industrial design - Hardware watchdog and 35 mm DIN rail mounting
10. No operating fee - No SIM card and no subscription required

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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	1W (master) / 0.8W (slave)
Input type	NPN signal / dry contact
Output type	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	Passive switch input (DI + COM)
Output	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	Input status	On when DI is closed
Output	Output status	On when the 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 37 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.

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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