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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.
Standard versions of the listed models use a 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. The standard Y401-99-L supports up to 5 km with clear line of sight and has no 10 km option. Fast communication versions of Y401-11-L and Y401-99-L have a communication distance of 1000 m and latency below 500 ms. 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
Y401, Y402, and Y403 models use the -ABCD-L suffix. The four positions encode I/O counts, and L identifies LoRa communication. Their control modes are:
| Model | Control mode |
|---|---|
Y401 | One-to-one |
Y402 | One-to-many |
Y403 | Auto Relay |
| Position | Meaning |
|---|---|
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 one AI and one AO channel 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 1 AI and 1 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 | Standard: up to 5 km; 10 km option. Fast version: 1000 m, less than 500 ms |
| 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 | Standard: up to 5 km with clear line of sight. Fast version: 1000 m, less than 500 ms |
| 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 | 1 AI + 1 AO | 4-20 mA | One analog signal 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.
- Y401-11-L and Y401-99-L are also available as fast communication versions: 1000 m communication distance and latency below 500 ms. Specify the required version when ordering.
- 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.
- 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. 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 |
| Normal reset condition | During normal communication, 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.
Communication Loss
For the Y401, Y402, and Y403 digital relay models, if wireless communication is lost, the receiver retains the last relay output states for approximately 80 seconds. If communication has not recovered by then, the relay outputs automatically reset to the de-energized (OFF) state. The normally open (NO–COM) contacts open.
This relay timeout does not define the analog output fault state of Y401-0011-L or Y401-0044-L. Their datasheets leave that behavior undefined; follow the dedicated analog specifications.
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 | Standard versions: up to 5 km; 10 km option for selected configurations, excluding Y401-99-L. Fast versions of Y401-11-L and Y401-99-L: 1000 m, latency below 500 ms. Verify antenna, obstruction, interference, and site conditions |
| Load selection | Observe both voltage and current ratings for the selected model; use the model-specific AC rating and DC 28 V / 5 A rating rather than a fixed power threshold |
| Inductive loads | Drive a suitably rated contactor and add surge suppression |
Documents
| Model | Specification | User 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 | Wiring and commissioning manual |
| Y401-0011-L | Open specification | Wiring and commissioning manual |
| Y401-0044-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 |
| Y402-41-L | Open specification | Wiring and commissioning manual |
| Y403-11-L | Open specification | Wiring and commissioning manual |
For the family overview, see Wireless I/O Module.
- Manufacturer: Hunan YenGear Tech Co., Ltd.
- Email: [email protected]
- Website: www.yengear.com