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Wireless I/O Modules (Y401 / Y402 / Y403 / Y412)
YenGear Wireless I/O Modules extend digital control and analog measurement signals over a private LoRa link. Digital models connect passive field inputs to relay outputs; Y401 analog models reproduce remote analog inputs at corresponding analog outputs. The Y401, Y402, and Y403 families cover point-to-point, one-to-many, and multi-node linkage relationships; 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.
Range depends on the model: the digital models below specify up to 10 km in open areas; Y401-0011-L specifies up to 5 km; Y401-0044-L range remains to be confirmed. Actual range depends on antenna installation, obstructions, interference, and site conditions. DI terminals accept only passive dry contacts or NPN open-collector outputs; analog terminals require the signal type specified for the selected model.
Model Matrix
Digital I/O Models
| Product image | Model | DI | DO | Control relationship | Documents |
|---|---|---|---|---|---|
 | Y401-11-L | 1 | 1 | Point-to-point (A ↔ B) | Manual · Specification |
 | Y401-22-L | 2 | 2 | Point-to-point (A ↔ B) | Manual · Specification |
 | Y401-44-L | 4 | 4 | Point-to-point (A ↔ B) | Manual · Specification |
 | Y402-11-L | 1 | 1 | One-to-many (master ↔ slaves) | Manual · Specification |
 | Y402-44-L | 4 | 4 | One-to-many (master ↔ slaves) | Manual · Specification |
 | Y402-4411-L | 1 master / 4 slave | 1 master / 4 slave | One-to-many, 1-to-4 mapping | Manual · Specification |
 | Y403-11-L | 1 per node | 1 per node | Multi-node linkage | Manual · Specification |
 | Y412-22/44/88-L | 2 / 4 / 8 | 2 / 4 / 8 | Configurable master/slave; unidirectional or bidirectional | Manual · Specification |
Analog I/O Models
Both analog models use a point-to-point link and have no DI or DO channels. Channel counts below are per module.
| Product image | Model | AI | AO | Signal type | Supply | Documents |
|---|---|---|---|---|---|---|
 | Y401-0011-L | 1 | 1 | 4-20 mA | 9-36 V DC | Specification and wiring diagrams |
 | Y401-0044-L | 4 | 4 | 4-20 mA or 0-10 V | 9-36 V DC | Specification and wiring diagrams |
The four-digit code follows DI / DO / AI / AO: 0011 means 0DI + 0DO + 1AI + 1AO; 0044 means 0DI + 0DO + 4AI + 4AO. Confirm the Y401-0044-L signal selection method before ordering. Its model-specific performance parameters remain under verification.
Each specification includes two-, three-, and four-wire current connection examples. The Y401-0044-L specification also describes 0-10 V wiring; the two-wire current-loop example applies only to 4-20 mA.
Y412 — Configurable Wireless I/O
Y412 is the configurable multi-channel member of the Wireless I/O Modules family. Choose 2DI + 2DO, 4DI + 4DO, or 8DI + 8DO hardware, then set the master/slave role and control mode for the site. Bidirectional follow and unidirectional feedback modes support remote start/stop, valve and pump control, lighting groups, and other auxiliary relay applications.
| Selection point | Y412 options |
|---|---|
| Channel count | 2, 4, or 8 DI + DO per module |
| Control mode | Master/slave; 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 |
| Range planning | Up to 10 km in open areas with the specified antenna and installation conditions* |
See the Y412 Datasheet and Y412 User Manual for wiring, DIP settings, and commissioning.
Series Comparison
The table below compares the fixed Y401/Y402/Y403 topology families. Y412 is covered in the configurable Wireless I/O section above because its channel count and operating mode are selected independently.
| Selection criterion | Y401 | Y402 | Y403 |
|---|---|---|---|
| Control relationship | Point-to-point, bidirectional | One master to one or more slaves; status can return | Any linked node can drive all linked relay outputs |
| Channel options | Digital: 1, 2, or 4 DI/DO; analog: 1 or 4 AI/AO per node | 1/1, 4/4, or 1-to-4 mapping | 1 DI + 1 DO per node |
| Range | Digital: up to 10 km*; 0011: up to 5 km*; 0044: to be confirmed | Up to 10 km* | Up to 10 km* per hop; relay paths can extend coverage |
| Best fit | Two fixed locations and cable replacement | A control point with several remote points | Multi-point linkage across a distributed site |
| Setup | Digital and 0011: factory-paired; 0044 pairing procedure to be confirmed | Factory-paired master/slave set; expandable | Nodes automatically forward signals |
* Open-area figure; actual range depends on model, antenna, installation height, obstructions, interference, and site conditions.
Core Application Patterns
| Application | Typical relationship | Suitable families | What the link does |
|---|---|---|---|
| Analog signal extension | Field transmitter to a remote analog receiver | Y401-0011-L or Y401-0044-L | Transfers 4-20 mA signals; Y401-0044-L also supports a 0-10 V option. |
| Access-control signal extension | Door, gate, or barrier contact at one location to a remote relay | Y401, Y402, or Y412 | Carries a dry-contact state to a remote relay or controller input without a long signal cable. |
| Multi-point linkage alarm | Any alarm input to multiple remote alarm outputs | Y403 | Forwards a contact state to linked nodes for coordinated auxiliary annunciation. Use a certified independent path for life-safety functions. |
| Remote wireless equipment control | Local switch or PLC contact to a distant load circuit | Y401, Y402, Y403, or Y412 | Drives a suitably rated relay, contactor, lamp, valve, or pump control circuit; the module relay does not supply load voltage. |
These modules are for auxiliary control and signalling. Do not use the wireless link as the sole emergency-stop, personnel-safety, or hard-real-time control path. High-power or inductive loads require a correctly rated contactor and suppression.
Related Field-Ready Products
For a complete enclosure, power system, and field interface built around the Y40 wireless link, see the Y901 Integrated Multi-Point Wireless Alarm System and Y953 Wireless Control Cabinet. These are complete products, not additional Wireless I/O Module SKUs.
Choose a Model
- Select the control relationship: two points (Y401), one-to-many (Y402), or multi-node linkage (Y403); choose Y412 when configurable master/slave modes are a better fit.
- Select digital or analog I/O. For analog signals, choose 0011 for 1AI + 1AO at 4-20 mA, or 0044 for 4AI + 4AO at 4-20 mA or 0-10 V. For digital models, select the DI/DO count and, for Y402-4411-L, the 1-to-4 mapping. For Y412, choose the 2-, 4-, or 8-channel variant and operating mode.
- Confirm range, antenna placement, supply, wiring, and the relevant relay or analog signal ratings in the model specification.
Use the Y4xx Selection Guide for a scan-friendly comparison, the Y401 / Y402 / Y403 User Manual and Y412 User Manual for wiring and commissioning, and the Application Guide for deployment patterns.
For analog model wiring and current product details, use the dedicated Y401-0011-L and Y401-0044-L specifications.
- Manufacturer: Hunan YenGear Tech Co., Ltd.
- Email: [email protected]
- Website: www.yengear.com