E32-DTU(433L37) 433MHz SX1278 LoRa Long Range 5W RS232 RS485 Radio Frequency RTU Module
[Frequency]：410~441MHz
[Power]：37dBm
[Distance]：20km
[Interface]：RS232/RS485
[Weight]：259±5g
[Introduction]：E32-DTU (433L37) is wireless data transceiver of 433M with standard RS232/RS485 connectors. They are half-duplex. TX & RX modems with LoRa technology and transparent transmission mode. Voltage supply ranges from 8V to 28V, Working frequency
| Pin No. | Name | Function | Description |
|---|---|---|---|
| 1 | DB-9 female socket | RS-232 interface | Standard RS-232 interface |
| 2 | 3.81 terminal block | RS-485, power interface | Standard RS-485 connector and line-pressing power source connector |
| 3 | PWR-LED | Power LED | Red, light on when power on |
| 4 | TXD-LED | TX LED | Yellow, flicker when transmitting data |
| 5 | RXD-LED | RX LED | Yellow, flicker when receiving data |
| 6 | DC power connector | Power interface | Drop-in round hole, 5.5mm external diameter, 2.5mm internal diameter |
| 7 | DIP switch | DIP switch | Operation mode control |
| 8 | Antenna interface | SMA-K interface | External screw and inner hole, 10mm long, 50Ω characteristic impedance |