Y401-22-L LoRa Wireless I/O Module Datasheet

• 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

1. Overview

The Y401-22-L is a dual-channel point-to-point wireless I/O terminal based on LoRa modulation. Two units (Device A and Device B) are factory paired. The two channels operate independently and are ready to use without additional setup.

Operating Logic

• Device A DI closed -> the corresponding DO on Device B energizes
• Device A DI open -> the corresponding DO on Device B resets
• Bidirectional operation: the same logic applies from Device B to Device A

Channel Mapping

Device A	Device B
Channel 1 input	Channel 1 output
Channel 2 input	Channel 2 output

Typical Applications

Remote equipment control, multi-pump interlock, gate control, and alarm systems

2. Ordering Information

Model Configuration

Y401-22-L is a one-to-one LoRa pair. The two digits, 22, specify the digital I/O count on the two sides: each device has 2 DI and 2 DO.

For the full code and examples, see Model Naming.

Package Contents

Qty.	Item
2	Y401-22-L modules (Device A and Device B)
2	470 MHz magnetic-mount antennas
2	DIN rail clips
1	Quick reference guide
1	Warranty card

3. Key Features

1. Dual-channel control - Two independent channels with no cross-interference
2. Long-range communication - Up to 5 km standard in open areas; a 10 km option is available for selected configurations
3. Plug-and-play deployment - Factory paired, no configuration required
4. Wide supply range - 9 to 36V DC with reverse-polarity protection
5. Relay output - 2 x SPDT relays, rated at AC 277V 5A / DC 28V 5A
6. Dry contact / NPN DI - Supports passive dry contacts and NPN open-collector inputs
7. Status indication - LEDs for power, link, input, and output status
8. Industrial design - Hardware watchdog and 35 mm DIN rail mounting
9. No operating fee - No SIM card and no subscription required

4. Technical Specifications

Wireless

Parameter	Specification
Frequency band	398 to 525 MHz
Communication range	Up to 5 km standard; 10 km option available for selected configurations
Antenna connector	SMA
Standard antenna	470 MHz magnetic-mount antenna

Electrical

Parameter	Specification
Supply voltage	9 to 36V DC
Max. power consumption	1.5W
Input channels	2 x passive dry contact / NPN open-collector (no voltage input to DI)
Output channels	2 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

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	2 x passive switch input (DI + COM)
Output	2 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 / 2	Input status	On when the corresponding DI is closed
Output 1 / 2	Output status	On when the corresponding relay is energized

6. Mechanical and Environmental

Mechanical Specifications

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

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. Leave enough space for ventilation.

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. Channel isolation - The two 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: [email protected]
• Website: www.yengear.com