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Wireless 900Mhz radio serial bridge

Wireless Serial Bridge

The CL4490 transceiver is a Frequency-Hopping Spread Spectrum (FHSS) radio designed for license-free operation in the 900MHz ISM band. Out-of-the box, the radio sustains a standard asynchronous serial data stream between two or more radios. Housed in a compact and rugged die-cast enclosure, the radio is equipped to replace thousands of meters of serial cable with its wireless link. The radio features an RS-232 or RS-485 interface for integration into legacy data systems.

Durable Industrial grade enclosure
Transparent operation, supports any legacy system
Transmits around corners, through walls
Reliable communication up to 115.2Kbps


Output power 1000mW
Transmission range Up to 1500 feet (450m) indoors; Up to 20 miles (32 km) line-of-sight
Power Consumption (@ 12 Vdc) 400mA
Configuration software Easy-to-use Windows based software
RF Connector RPSMA Jack, 1/2 Wave Dipole
Frequency band, RF Technology 902 – 928, FHSS (USA); 915-928, FHSS (Australia)
Environmental conditions Operating temperature -40° to +80°C; 10% to 90% humidity (non-condensing)
Dimensions 4.4 x 2.7 x 1.4 inches
Serial Connector DB-9 Male (RS-232), Terminal Block (RS-485)

CL4490 transceivers operate in a Point-to-Point or Point-to-Multipoint, Client-Server or Peer-to-Peer architecture. One transceiver is configured as a Server and there can be one or many Clients. To establish synchronization between transceivers, the Server emits a beacon. Upon detecting a beacon, a Client transceiver informs its Host and a RF link is established.

CL4490s implement a proprietary communication protocol to provide secure data transmissions. As it uses FHSS technology, the data remains reliable over long distances. Use of license free frequency bands ensure that the units are ready to use with no further certification requirements.

Each unit is small and easily portable for use in mobile and temporary settings as well as for fixed installations. The CL4490 configuration software enables custom configurations based on unique application requirements.