Módem inalámbrico E90-DTU(2G4L27) RS232/485 lora
[Frecuencia]：2400~2500MHz
[Energía]：27dBm
[Distancia]：7km
[Tamaño]：82*62*25mm
[Interfaz]：RS232/RS485
[Peso]：130±5g
[Introducción]：E90-DTU (2G4L27) es un transceptor de datos con tecnología de modulación LoRa de grado militar. Con múltiples modos de transmisión, funciona en la banda de frecuencia (por defecto 2424MHz). El transceptor proporciona una interfaz RS232/RS485 transparente y admite una entrada de voltaje de 8～28V.
| No. | Name | Function | Note |
|---|---|---|---|
| 1 | DB-9 female socket | RS-232 interface | Standard RS-232 interface |
| 2 | 3.81 terminal block | RS-485, power interface | Standard RS-485 interface and pressure line power interface |
| 3 | PWR-LED | Power LED | Red, lit when the power is on |
| 4 | LINK-LED | Data transceiver LED | Yellow, the connection is successful |
| 5 | DATA-LED | Serial data LED | Yellow, flashing during data transmission |
| 6 | DC power interface | Power interface | In-line round hole, outer diameter 5.5mm, diameter 2.5mm |
| 7 | DIP switch | Mode selection | M1=upward dialing, configuration mode when M0 isarbitrary, M1=downward dialing, transparent transmissionmode when M0 is arbitrary |
| 8 | Antenna interface | SMA-K interface | external thread, 10mm, 50Ωcharacteristic impedance |