This guide describes the ARF53 devices, their options and accessories.
The ARF53 data modem converts serial data into radio frames for transmission to a compatible device. It is offered as a card or an IP65‑rated box with integrated or external antenna.
The guide covers power supply requirements, RS232 and RS485 wiring, radio channel settings, AT command configuration, technical specifications, and firmware update procedures.
| Operating frequency | 902/928 MHz |
|---|---|
| Operating temperature | -30 °C to +70 °C |
| Power supply | 4.5 V to 36 V DC (integrated regulator) |
| Size | 145 × 100 × 40 mm |
| Number of channels | 50 FHSS channels |
| Modulation | FSK |
| Packaging | IP65 box with integrated or external antenna |
| Transmitter frequency range | 902.75 MHz to 927.25 MHz (500 kHz steps) |
| Maximum RF output power | 27 dBm (500 mW) |
| Tx power consumption | 3.2 W |
| Receiver sensitivity | -112 dBm (BER 10⁻³) |
| Radio data rate | 10 kbps to 57.6 kbps |
| Serial data rate | 1.2 kbps to 57.6 kbps (programmable) |
| Serial ports | TxD, RxD, RTS, CTS (RS232 default) |
| Standards compliance | FCC Part 15.247 |
| Maximum range | up to 6 km |
The modem operates from a DC source of 4.5 V minimum up to 36 V.
The device provides 50 frequency‑hopping spread‑spectrum channels.
Set the SW1.1 switch to ON and configure the S215 register to 1.
The modem can transmit up to 27 dBm (500 mW).