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Wireless I/O Modules Selection Guide
Use this guide to select a Y401, Y402, Y403, or Y412 Wireless I/O Module by control relationship, I/O count, and operating mode. The Y401/Y402/Y403 modules use a private LoRa link to carry passive dry-contact or NPN open-collector states to SPDT relay outputs; Y412 adds configurable 2-, 4-, and 8-channel master/slave control. No SIM card, Internet connection, or LoRaWAN gateway is required for the basic link. Never apply voltage directly to a DI terminal.
The specified range is up to 10 km in open areas. Treat this as a planning value, not a guaranteed distance: model, antenna, mounting height, obstructions, interference, and local site conditions determine the usable range.
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 10 km |
| Y401-22-L | 2 / 2 | Point-to-point, bidirectional | Two independent signals between two locations | Up to 10 km |
| Y401-44-L | 4 / 4 | Point-to-point, bidirectional | Four independent signals between two locations | Up to 10 km |
| Y402-11-L | 1 / 1 per node | One-to-many, bidirectional | One controller and several remote points | Up to 10 km |
| Y402-44-L | 4 / 4 per node | One-to-many, bidirectional | Four-channel control across multiple points | Up to 10 km |
| Y402-4411-L | 1 master / 4 slave | One-to-many, 1-to-4 mapping | One trigger drives four remote outputs | Up to 10 km |
| Y403-11-L | 1 / 1 per node | Multi-node linkage | Any linked node drives all linked outputs | Up to 10 km per hop |
| Y412-22/44/88-L | 2 / 4 / 8 DI + DO | Configurable master/slave | Selectable unidirectional feedback or bidirectional follow | Up to 10 km |
* 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 |
Common Y401 facts
- Point-to-point and bidirectional; no controller, gateway, or software configuration is required for the matched pair.
- 9–36 VDC module supply; each channel uses a passive DI and an SPDT relay DO.
- Relay rating: AC 277 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 |
| Y402-4411-L | 1 DI + 1 DO | 4 DI + 4 DO per slave | One master input maps to four slave outputs |
Common Y402 facts
- Use one master with one or more factory-paired slaves; the system can be expanded within the product specification.
- Select Y402-4411-L when one contact must trigger four outputs at each remote point.
- 9–36 VDC module supply and SPDT relay outputs; relay contacts do not supply load voltage.
Y403 — Multi-Node Linkage
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 nodes can automatically 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 10 km per hop in open areas*, with relay paths for coverage extension |
| Typical use | Multi-point linkage alarm, 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.
Y412 — Configurable Wireless I/O
Choose Y412 when the installation needs a configurable channel count or operating mode rather than one fixed Y401/Y402/Y403 topology. The family is available as 2DI + 2DO, 4DI + 4DO, or 8DI + 8DO, with one master and one or more slave devices configured for the site.
| Feature | Y412-22/44/88-L |
|---|---|
| Channel options | 2, 4, or 8 DI + DO per module |
| Control modes | Unidirectional feedback or bidirectional follow |
| Output action | Momentary or latching |
| Power versions | 8–28 VDC or 85–265 VAC |
| Relay output | Form A, up to 7 A at 250 VAC or 30 VDC |
| Typical use | Access-control extension, remote start/stop, pump/valve control, and lighting groups |
| Range planning | Up to 10 km in open areas with the specified antenna and installation conditions* |
For DIP settings, wiring, and commissioning, use the Y412 Datasheet and Y412 User Manual.
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 | Multi-node linkage forwards the state across the participating nodes. |
| Does the installation need configurable channel count and operating mode? | Y412 | Select 2/4/8 channels and configure master/slave, direction, and output action. |
| 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 Installation Facts
| Item | Requirement |
|---|---|
| DI input | Passive dry contact or NPN open collector between DI and COM; no voltage input |
| DO output | Y401/Y402/Y403: isolated SPDT relay (NO, COM, NC); Y412: Form A relay (NO, COM); use an external load supply |
| Module power | Y401/Y402/Y403: DC 9–36 V; Y412: 8–28 VDC or 85–265 VAC |
| Antenna | Use the specified band antenna, mount vertically, and keep clearance from large metal surfaces |
| Range planning | Up to 10 km in open areas*; 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 |
| Y402-11-L | Open specification | Wiring and commissioning manual |
| Y402-44-L | Open specification | Wiring and commissioning manual |
| Y402-4411-L | Open specification | Wiring and commissioning manual |
| Y403-11-L | Open specification | Wiring and commissioning manual |
| Y412-22/44/88-L | Open specification | Y412 wiring and commissioning manual |
For installation examples, see the Y401 / Y402 / Y403 Application Guide. For the family overview, see Wireless I/O Modules.
- Manufacturer: Hunan YenGear Tech Co., Ltd.
- Email: [email protected]
- Website: www.yengear.com