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Y502-L LoRaWAN Serial DTU with Isolated RS485 and RS232
Y502-L connects meters, PLCs and serial sensors to LoRaWAN through isolated RS485 and RS232.
- Protocol
- LoRaWAN 1.0.3
- RS485
- 1 isolated RS485, A+ / B−; default 9600 bps, 8-N-1
- RS232
- 1 isolated 3-wire RS232, TXD / RXD / GND; default 115200 bps, 8-N-1
- Voltage
- DC 9–28 V
$47.00
Price for the selected configuration.
Shipping & Tax: Shipping is quoted separately and paid before dispatch. Import duties, taxes, customs fees and destination charges are paid by the customer.
Overview
Y502-L connects meters, PLCs and serial sensors to LoRaWAN through isolated RS485 and RS232. Supports scheduled polling and transparent transport via a compatible gateway.
Key Features
- One isolated RS485 interface and one isolated RS232 interface; no direct DI, DO, AI or AO channels
- LoRaWAN 1.0.3 with OTAA/ABP activation and Class A/Class C operation
- Up to 16 scheduled acquisition scripts plus a heartbeat task, using HEX or ASCII commands
- Modbus RTU requests, custom serial frames, data-change reports and remote serial commands
- Transparent serial data travels in LoRaWAN packets; payload limits and downlink timing affect request/response operation
- 9–28 VDC supply, 35 mm DIN-rail mounting and 15 kV ESD protection on both serial interfaces
How it works & selection
Selection notes
Confirm the regional plan, gateway and Network Server settings, serial protocol and payload format before ordering. This model provides serial interfaces only; it has no direct DI, DO, AI or AO channels.
Technical specifications
| Protocol | LoRaWAN 1.0.3 |
|---|---|
| RS485 | 1 isolated RS485, A+ / B−; default 9600 bps, 8-N-1 |
| RS232 | 1 isolated 3-wire RS232, TXD / RXD / GND; default 115200 bps, 8-N-1 |
| Voltage | DC 9–28 V |
LoRaWAN Radio
| Protocol | LoRaWAN 1.0.3 |
|---|---|
| Activation | OTAA / ABP |
| Device Classes | Class A / Class C |
| Frequency Plans | CN470 (reference), EU433, EU868, AU915, IN865, AS923, RU864, US915; region-specific hardware; specify the AS923 sub-plan when ordering |
| Transmit Power | -1 to 22 dBm, configurable within regional limits |
| Bandwidth | 125 kHz |
| Spreading Factor | SF7–SF12 |
| Receiver Sensitivity | -135 dBm at SF12, BW125 kHz |
Serial Interfaces
| RS485 | 1 isolated RS485, A+ / B−; default 9600 bps, 8-N-1 |
|---|---|
| RS232 | 1 isolated 3-wire RS232, TXD / RXD / GND; default 115200 bps, 8-N-1 |
| Baud Rates | 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps |
| Format | 8 data bits; 1 or 2 stop bits; none, odd, or even parity |
| Esd Protection | 15 kV on RS485 and RS232 |
| Direct Io | None: 0 DI, 0 DO, 0 AI, 0 AO |
Acquisition
| Modes | Transparent transmission and active acquisition |
|---|---|
| Tasks | Up to 16 configurable acquisition scripts plus a heartbeat task |
| Command Formats | HEX or ASCII; Modbus RTU or custom serial frames |
| Maximum Script Length | 40 bytes |
| Script Interval | 10–86,400 s |
| Reporting | Periodic acquisition, heartbeat, and data-change reporting |
| Remote Functions | Remote parameter settings and serial read/control commands; supported commands depend on the installed firmware |
Power Supply
| Voltage | DC 9–28 V |
|---|---|
| Recommended Adapter | DC 12 V / 1 A |
| Maximum Current | 0.5 A at DC 12 V |
| Average Power | ≤0.5 W in low-duty-cycle operation |
Environmental
| Operating Temperature | -40 to 85 °C |
|---|---|
| Storage Temperature | -50 to 95 °C |
| Humidity | 0–95% RH, non-condensing |
Mechanical
| Dimensions | 87.65 × 36.54 × 59.3 mm |
|---|---|
| Weight | Approximately 0.5 kg |
| Mounting | 35 mm DIN rail |
| Antenna Connector | SMA female |
Deployment
| Gateway Compatibility | Y501-L or Y511-L with a matching regional plan and channel group, plus compatible local or remote Network Server settings |
|---|---|
| Serial Transport | Serial data travels in LoRaWAN packets. Payload limits, airtime and downlink scheduling affect frame length and request timeouts. |
| Downlinks | Class A receives downlinks after an uplink. Class C provides more receive opportunities. Delivery time depends on airtime, server scheduling and regional radio limits. |
| Payload | Payload format, FPorts and decoding rules depend on the installed firmware |
Package & resources
Package contents
| Item | Quantity |
|---|---|
| Y502-L DTU | 1 |
| DC 12 V / 1 A power adapter | 1 |
| LoRa antenna | 1 |
