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Y401 / Y402 / Y403 Wireless I/O Module Selection Guide
Use this guide to select a Y401, Y402, or Y403 Wireless I/O Module by control relationship and I/O type. Digital Y401/Y402/Y403 models use a private LoRa link to carry passive dry-contact or NPN open-collector states to relay outputs. Y401-99-L is a 9DI/9DO DC-powered model; Y401-0011-L and Y401-0044-L are point-to-point analog models with no DI or DO channels. No SIM card, Internet connection, or LoRaWAN gateway is required for the basic link. Never apply voltage directly to a digital DI terminal.
All listed models use a standard planning range of up to 5 km in open areas. A 10 km range option is available for selected configurations with the specified antenna and installation conditions. Y401-99-L also supports fast communication up to 1 km. Treat every range as a planning value, not a guaranteed distance: model, antenna, mounting height, obstructions, interference, and local site conditions determine the usable range.
Model Naming
The format is Y40x-ABCD-L. This naming rule applies to Y401, Y402, and Y403.
| Position | Meaning |
|---|---|
x | 1: one-to-one; 2: one-to-many; 3: Auto Relay |
A | Sender DI / DO channel count |
B | Receiver DI / DO channel count |
C | Sender AI / AO channel count |
D | Receiver AI / AO channel count |
L | LoRa communication |
Each count applies to both the input and output type on that side: 1 in a digital position means 1 DI and 1 DO. 0 means no channels of that type. Digital-only models use AB, with the trailing analog digits omitted.
For analog models, confirm the actual AI and AO channel counts in the dedicated specification. The Y401-0011-L hardware specification defines two AI and two AO channels per device.
Sender and receiver identify the two sides of the link; bidirectional devices can both send and receive. For Y402, these sides are the master and slave. Y403 uses equal-status nodes that automatically select a communication path and forward signals.
| Example | Model interpretation |
|---|---|
Y401-11-L | One-to-one LoRa pair; each device has 1 DI and 1 DO. |
Y402-41-L | One-to-many LoRa system; the master has 4 DI and 4 DO, and each slave has 1 DI and 1 DO. |
Y403-11-L | Auto Relay LoRa network; each node has 1 DI and 1 DO. |
Y401-0011-L | One-to-one LoRa analog pair; neither side has digital I/O, and each device has 2 AI and 2 AO. |
At a Glance
| Model | DI / DO | Control relationship | Best fit | Range* |
|---|---|---|---|---|
| Y401-11-L | 1 / 1 | Point-to-point, bidirectional | One signal between two fixed locations | Up to 5 km; 10 km option |
| Y401-22-L | 2 / 2 | Point-to-point, bidirectional | Two independent signals between two locations | Up to 5 km; 10 km option |
| Y401-44-L | 4 / 4 | Point-to-point, bidirectional | Four independent signals between two locations | Up to 5 km; 10 km option |
| Y401-99-L | 9 / 9 | Point-to-point, bidirectional | Nine-channel control between two locations | Up to 5 km; fast communication up to 1 km |
| Y402-11-L | 1 / 1 per node | One-to-many, bidirectional | One controller and several remote points | Up to 5 km; 10 km option |
| Y402-44-L | 4 / 4 per node | One-to-many, bidirectional | Four-channel control across multiple points | Up to 5 km; 10 km option |
| Y402-41-L | 4-channel master / 1-channel slave | One-to-many, 4-to-1 mapping | Four master channels reach up to four one-channel remote points | Up to 5 km; 10 km option |
| Y403-11-L | 1 / 1 per node | Auto Relay | Any linked node drives all linked outputs | Up to 5 km per hop; 10 km option |
* Open-area planning value. Confirm the selected model specification and perform a site survey before committing to a range.
Y401 — Point-to-Point I/O Mirroring
Choose Y401 when two fixed locations need corresponding relay actions in both directions. A factory-paired Device A and Device B carry each channel state across the private LoRa link; the remote relay follows the input state.
| Model | Channels | Typical selection |
|---|---|---|
| Y401-11-L | 1 DI + 1 DO per node | Door contact, pump start/stop, or one remote alarm output |
| Y401-22-L | 2 DI + 2 DO per node | Two independent switches, valves, or status signals |
| Y401-44-L | 4 DI + 4 DO per node | Multi-channel gate, lighting, or equipment control |
| Y401-99-L | 9 DI + 9 DO per node | High-channel remote control, equipment status, or alarm signalling |
Analog Y401 Models
| Model | Channels per node | Signal | Typical selection |
|---|---|---|---|
| Y401-0011-L | 2 AI + 2 AO | 4-20 mA | Two analog signals between two fixed locations |
| Y401-0044-L | 4 AI + 4 AO | 4-20 mA or 0-10 V | Four analog signals between two fixed locations |
These analog Y401 models have no DI or DO channels. Use their dedicated specifications for signal wiring, power, range, and the ordered signal configuration.
Common digital Y401 facts
- Point-to-point and bidirectional; no controller, gateway, or software configuration is required for the matched pair.
- Y401-11-L, Y401-22-L, Y401-44-L, and Y401-99-L use DC 9–36 V module power.
- Digital inputs use passive dry contacts or NPN open-collector signals. Y401-99-L provides 9 DI and 9 relay output channels per module.
- Relay ratings are model-specific. Y401-99-L is rated at AC 250 V / 5 A or DC 28 V / 5 A; use an external contactor for larger or inductive loads.
Y402 — One-to-Many I/O Mapping
Choose Y402 when one master location must exchange states with one or more slave locations. Master inputs distribute to the matching slave outputs, while slave inputs can return status to the master.
| Model | Master I/O | Slave I/O | Mapping |
|---|---|---|---|
| Y402-11-L | 1 DI + 1 DO | 1 DI + 1 DO per slave | 1-to-1 channel across multiple slaves |
| Y402-44-L | 4 DI + 4 DO | 4 DI + 4 DO per slave | Four matching channels across multiple slaves |
| Y402-41-L | 4 DI + 4 DO on master | 1 DI + 1 DO per slave | Each master channel maps to one assigned one-channel slave |
Common Y402 facts
- Use one master with one or more factory-paired slaves; the system can be expanded within the product specification.
- Select Y402-41-L when one 4-channel master must reach several one-channel remote points.
- 9–36 VDC module supply and SPDT relay outputs; relay contacts do not supply load voltage.
Y403 — Auto Relay
Y403 is a single-model family: Y403-11-L. Choose it when a distributed site needs coordinated auxiliary outputs rather than a single master/slave relationship. Any node input can energize the linked node outputs, and the Auto Relay network can forward signals to extend the practical path.
| Feature | Y403-11-L |
|---|---|
| I/O per node | 1 DI + 1 DO |
| Linkage logic | Any linked node input → all linked node relay outputs |
| Range | Up to 5 km per hop in open areas*; 10 km option available, with relay paths for coverage extension |
| Typical use | Auto Relay alarm linkage, distributed lighting, or coordinated auxiliary equipment control |
| Reset condition | Outputs reset after all linked node inputs return to open |
Y403 is not a certified emergency-stop or personnel-safety system. Keep an independently certified safety path for those functions and validate multi-hop delay for any timing-sensitive control.
Select by Application
| Application question | Recommended family | Why |
|---|---|---|
| Do two fixed locations need corresponding relay actions? | Y401 | Direct point-to-point I/O mirroring keeps the relationship simple. |
| Does one control point need to reach several remote points? | Y402 | One-to-many I/O mapping distributes commands and returns status. |
| Should an input at any of several nodes activate linked outputs? | Y403 | Auto Relay forwards the state across the participating nodes. |
| Do two fixed locations need 4-20 mA or 0-10 V signal transfer? | Y401-0011-L or Y401-0044-L | Use the dedicated analog point-to-point model and wire the matching signal type at both ends. |
| Is this an emergency-stop, personnel-safety, or hard-real-time loop? | None of these wireless modules alone | Use the independently certified safety system; the wireless link may only be auxiliary signalling. |
Shared Digital Installation Facts
The following requirements apply to the digital relay models. For Y401-0011-L and Y401-0044-L, follow the analog wiring diagrams and limits in the dedicated specification.
| Item | Requirement |
|---|---|
| DI input | Passive dry contact or NPN open collector between DI and COM; no voltage input |
| DO output | Y401/Y402/Y403 digital models: isolated SPDT relay (NO, COM, NC); use an external load supply |
| Module power | Y401-11/22/44-L, Y402, and Y403: DC 9–36 V; Y401-99-L: DC 9–36 V |
| Antenna | Use the specified band antenna, mount vertically, and keep clearance from large metal surfaces |
| Range planning | Up to 5 km standard; 10 km option available for selected configurations; Y401-99-L fast communication up to 1 km; verify antenna, obstruction, interference, and site conditions |
| Inductive loads | Drive a suitably rated contactor and add surge suppression |
Documents
| Model | Specification | Shared manual |
|---|---|---|
| Y401-11-L | Open specification | Wiring and commissioning manual |
| Y401-22-L | Open specification | Wiring and commissioning manual |
| Y401-44-L | Open specification | Wiring and commissioning manual |
| Y401-99-L | Open specification | — |
| Y401-0011-L | Open specification | — |
| Y401-0044-L | Open specification | — |
| Y402-11-L | Open specification | Wiring and commissioning manual |
| Y402-44-L | Open specification | Wiring and commissioning manual |
| Y402-41-L | Open specification | Wiring and commissioning manual |
| Y403-11-L | Open specification | Wiring and commissioning manual |
For shared wiring and commissioning, see the Y401 / Y402 / Y403 User Manual. For the family overview, see Wireless I/O Module.
- Manufacturer: Hunan YenGear Tech Co., Ltd.
- Email: [email protected]
- Website: www.yengear.com