VTK-L23
- Standard version: 22dBm；High-power version: 27dBm
- 1× RS232-DB9 (TXD, RXD, GND)；1× RS485 (A+, B-)
- Supports LoRaWAN 1.0.2 protocol Class A/Class C modes
- Supports custom RS232/RS485 data collection tasks and timed collection tasks
- Supports RS232/RS485 over LoRaWAN transparent transmission
- Supports custom user communication protocols
- Supports custom LoRaWAN heartbeat tasks
This DTU is a universal LoRaWAN DTU product with functions for actively reading slave devices and transparent data transmission. It uses RS485 and RS232 to read data from slave devices periodically or via command instructions (supports Modbus-RTU structured data), and then transmits the data to gateways and platforms via LoRa wireless communication technology. The entire wireless transmission process follows the LoRaWAN standard protocol. Supports LoRaWAN 1.0.2 standard protocol stack, Class A/C modes, OTAA/ABP network registration, fixed SF and ADR-based SF auto-switching, adjustable transmit power, and configurable channels. Features script editing, customizable tasks/heartbeats/output ports, serial port configuration, and watchdog functionality for high stability. Uses RS485/RS232 for data interaction with slave devices. Configurable via PC software for rapid LoRaWAN network access and wireless data transmission.
| Parameter | Description |
| Transmit Power | -122dBm (Standard version), -127dBm (High-power version) |
| Bandwidth | Fixed 125kHz |
| Spreading Factor | Adjustable SF7~SF12 (5.5, 3.1, 1.8, 1.0, 0.6, 0.3Kbps) |
| Rx Sensitivity | -135dBm@SF12 BW125kHz |
| Harmonics | < -40dBm @ 1GHz |
| Frequency Bands | EU433, CN470, CN779, EU868, AS923, AU915, KR920 (LoRaWAN global frequency plan) |
| RS232 | Isolated circuit, 15KV ESD protection; Configurable baud rate (2400~115200bps) |
| RS485 | Isolated circuit, 15KV ESD protection; Configurable baud rate (2400~115200bps) |
| Current | Max 0.5A (D8L), Max 1A (D8P) |
| Power Consumption | Average ≤0.5W |
| Dimensions | 96.5×89.3×24.3mm |
| Weight | ~0.7kg |
| Operating Temp. | -20°C70°C (Storage: -40°C85°C) |
| Humidity | 0~95% (Non-condensing) |
