NL900 Radio Modem

900Mhz Radio Modem NL900
  • Overview
  • Specifications
  • Applications
  • Support

RF Neulink's NL900 stand-alone transceiver can be set up in minutes to virtually cut the cables between RS232 devices. Its flexibility and price allows users to quickly upgrade wired terminals to cordless operation in industrial, commercial, even residential applications.

Powered by a 1000mW 900 MHz radio, each NL900 unit is small and easily portable for use in mobile and temporary settings as well as for fixed installations. Included software enables custom configurations based on user needs.

This modem implements a proprietary communication protocol to provide secure local data transmissions. Because it uses FHSS technology, the data remains reliable over distances of up to 10 miles line-of-sight (900 MHz). Use of a license-free frequency band ensures that the NL900 is ready to use with no further certification requirements. Every unit is backed by a 30-day guarantee and full warranty with technical support.

RF Protocol, Acknowledgement (ACK) Transmitted packets are successfully acknowledged. If not, they are resent until successful (user selectable number of retries). Error detection is used and duplicate data filtered out before sending to the host interface. Optional full duplex control setting allows equal time for transmitting and receiving data at the RF level, keeping a single transmitter from dominating the system bandwidth.

RF Addressing Modes, Unicast (one-to-one addressing) and Broadcast (one-to-many addressing)

RS232 Transparent , Change configuration commands, Configuration can be changed through a command/data interface signal or AT commands. Change-on-the-fly parameters include base or remote designations, destination MAC address, channel number (to communicate with a different base), enter/exit low-power modes, etc. Custom settings are available by user request.

Data Encryption Standard (DES), DES uses an established algorithm and a 56-bit key stored in onboard EEPROM. to protect data. Available in 900 MHz version only.

Set up and Operation, the complete system is comprised of a central base and any number of remote nodes that can operate in point-to-point or point-to-multipoint networks. Multiple sub-networks can be created by assigning unique radio addresses to specific device groups. RF Neulink is available to support in-system design and applications.

Technical Specifications

Standard interface RS232 (DB9 male)
Frequency band 902 to 928 MHz
Modulation FHSS FSK
Serial interface data rate 1200-115,200 bps
Output power 1000mW variable
Input power 7Vdc to 18Vdc
Power Consumption (@12VDC) 400mA Tx, 40mA Rx
Power Supply AC transformer via 6-foot cable (183 cm)
Electrical requirements Line voltage 100-120V (240V outside U.S.); Frequency 50-60 Hz
Channels Up to 32
Security 1-byte system ID, DES
Sensitivity -100 dB @ full RF data rate
Range Up to 10 miles (16 km)
Temperature -30° to +60°C
Humidity 90% at 40°C non-condensing
Dimensions 4.75 x 2.75 x 1.17 inches (121 x 70 x 30 mm)
Weight <6 oz. (<170 g)
Antenna; connector Dipole; RP-SMA jack (female)
Configuration software Included, for Windows OS

See Spec Sheet and User Manual for more information

For outside operation of radio modem products a NEMA 4 enclosure is recommended.

RF Neulink reserves the right to change specifications of this product at any time without notice and without obligation to notify any person of such changes. For outside operation of radio modem products a

Weigh Scales—Instantly access weight and measurement data. Link virtually cuts wires to all brands of scale equipment, from indicators to receipt printers.

Process Control—Set up any factory more conveniently. Engineers and technicians can quickly move data links from machine to machine without costly wiring.

Kiosks & P.O.P.—Smale & portable, links make it possible to set up equipment where it best serves customers. Use at retail stores, service stations, events, etc.

Data Logging—Upload data to your PC from your logger or monitor without getting up from the chair. Use link for tank level-monitoring, control instruments, etc.

Electronic Signs—Faster, cheaper & less invasive than trenching to lay cable, links simply attach to the serial ports of the PC and sign or scoreboard.

Contact Us

Telephone: 858-549-6340
Toll Free 800-233-1728
Fax 858-549-6349


More Information


Industrial Wireless Modems

  • Simple cable replacement for retrofits and new installs
  • Transmits around corners, through walls and obstructions
  • Reliable communication at rates from 1,200 - 115,200 bps


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