2.4 G RS-232/RS-485/RS-422 Wireless Modem

The tRFU-2400 is a 2.4 GHz radio frequency modem that provides RS-232, RS-485 and RS-422 port interfaces. The tRFU-2400 is designed to act as a wireless bridge to convert signals between serial and wireless formats, and is great for applications when the physical wire deployment is inconvenient. The tRFU-2400 makes it easy to build a low-cost data acquisition and control application between a host and a range of remote sensors via wireless communication.

The tRFU-2400 is a spread spectrum radio frequency (RF) modem based on the IEEE 802.15.4 standard. The IEEE 802.15.4 standard is operating on the ISM bands which uses a transmission frequency range between 2405 and 2480 MHz. A total of 16 channels are available and each with a channel separation of 5 MHz. Two operating modes are also supported, including Peer-to-Peer (P2P) mode, which allows full-duplex communication, and Broadcast mode, which allows half-duplex functionality in multi-point communication.


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    • ISM 2.4 GHz Operating Frequency
    • Direct Sequence Spread Spectrum (DSSS) RF technology
    • RS-232/RS-485/RS-422 Interface Supported
    • Half-duplex communication up to 115200 bps
    • Full-duplex communication up to 57600 bps
    • Fully External Switch for the Hardware Configuration
    • Surge and ESD Protection
    • DIN-Rail Mountable

    Hardware Specifications

    Wireless Modulation OQPSK (Offset Quadrature Phase-shift Keying)
    Spread Spectrum DSSS (Direct-Sequence Spread Spectrum)
    Channels 16
    Sensitivity -97 dBm
    Transmission Power 11 dBm (Default)
    17 dBm (Max.)
    Antenna 3 dBi PCB Antenna
    Transmission Range 180 m (Typical)
    COM0 COM 0 RS-232 TxD, RxD and GND
    RS-485 DATA+, DATA-; Internal ASIC Self-tuner; Non-isolated
    RS-422 TxD+, TxD-, RxD+, RxD
    Baud Rate Full-duplex 2400 to 57600 bps
    Half-duplex 2400 to 115200 bps
    Data Format N81, O81, E81, N82
    Buffer 2560 Bytes
    LED Indicators Green Rx/Tx
    Yellow Power State
    Power EMS Protection ESD, Surge, EFT and Hi-Pot
    Required Supply Voltage +10 VDC ~ +30 VDC
    Power Consumption 0.4 W (Max.)
    Mechanical Casing Plastic
    Flammability UL 94V-0 materials
    Dimensions (L x W x H) 52 mm x 95 mm x 27 mm
    Installation DIN-Rail
    Environment Operating Temperature -25 to +75°C
    Storage Temperature -40 to +80°C
    Relative Humidity 0 to 90% RH, Non-condensing

    Ordering Informations

    tRFU-2400 CR 2.4 G RS-232/RS-485/RS-422 Wireless Modem (RoHS)