Y403-11-L LoRa Auto Relay Wireless I/O Module Datasheet

Y403-11-L

• User Manual

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 Y403-11-L is a LoRa-based Auto Relay Wireless I/O Module. Equal-status nodes automatically select a communication path and forward switching signals to other nodes, extending the practical communication path. It is suited to coordinated auxiliary control and signalling such as distributed alarm annunciation and tunnel lighting; it is not a certified emergency-stop or personnel-safety system.

Operating Logic

• When the DI on any node is closed, the DO on all nodes, including the local node, energizes
• The outputs on all nodes reset only after the DI on every node returns to open
• Auto Relay nodes select the best route and forward signals to extend communication distance

Typical Applications

Auxiliary alarm annunciation, tunnel lighting control, underground facility monitoring, and coordinated non-safety equipment control

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2. Ordering Information

Model Configuration

Y403-11-L is an Auto Relay LoRa module with 1 DI and 1 DO per node. Nodes have equal status and automatically forward signals.

For the full code and examples, see Model Naming.

Package Contents

Qty.	Item
1	Y403-11-L module
1	470 MHz magnetic-mount antenna
1	DIN rail clip
1	Quick reference guide
1	Warranty card

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3. Key Features

1. Automatic relay forwarding - Nodes automatically select the best communication path and forward signals
2. Interlocking control - A trigger from any node drives all linked nodes, including the local node
3. OR logic output - All outputs reset only when every node input returns to open
4. Long-range communication - Up to 5 km per hop standard in open areas; a 10 km option is available for selected configurations, with relay-based range extension
5. Scalable expansion - Supports node expansion through Auto Relay forwarding
6. Wide supply range - 9 to 36V DC with reverse-polarity protection
7. Relay output - 1 x SPDT relay, rated at AC 277V 5A / DC 28V 5A
8. Dry contact / NPN DI - Supports passive dry contacts and NPN open-collector inputs
9. Status indication - LEDs for power, relay 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	Up to 5 km per hop standard; 10 km option available for selected configurations
Relay extension	Extended through node-to-node relaying
Antenna connector	SMA
Standard antenna	470 MHz magnetic-mount antenna

Electrical

Parameter	Specification
Supply voltage	9 to 36V DC
Max. power consumption	1W
Input type	Passive dry contact / NPN open-collector (no voltage input to DI)
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

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
Network	Relay link status	On when the relay communication 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	Specification
Dimensions	88 x 37 x 59 mm
Weight	Approx. 50 g
Mounting	35 mm DIN rail
Protection rating	IP20
Housing material	Flame-retardant plastic

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7. Installation and Wiring

Input Wiring

No voltage input on DI

The digital input (DI) is not a voltage-input terminal. It is strictly forbidden to connect any powered signal or voltage source to DI.

Correct wiring: connect only a passive dry contact or an NPN open-collector output between DI and COM. Do not connect sensor power, PLC voltage output, or any external voltage directly to DI.

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

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

NPN open-collector output:

• Output transistor collector -> DI
• Output transistor emitter / 0V reference -> COM
• Do not connect sensor power or any voltage output to DI

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. Position nodes strategically to achieve the best automatic relay coverage.
6. Leave enough space for ventilation.

Relay Expansion

• Nodes automatically select the best communication path and can relay traffic for other nodes.
• New nodes can join the existing automatic relay system without complex manual setup.
• Direct node-to-node range is up to 5 km per hop as a standard planning value; a 10 km option is available for selected configurations, with longer reach available through relay paths.

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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. Relay latency - Multi-hop relay paths may introduce additional delay. Confirm timing requirements before deployment.
5. Interlocking logic - All node outputs reset only after every node input returns to open.

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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: [email protected]
• Website: www.yengear.com