Comprised of the 900 MHz DNT900 and the 2.4 GHz DNT2400, the DNT series is a low-cost, long-range, multi-purpose, multi-function frequency hopping line of RF modules. DNT modules support Analog and Digital I/O and Serial data, and have the ability to auto-report and sleep between reports thereby reducing power consumption. DNT modules support all standard serial data rates for host communications from 1.2 to 460.8 kb/s. On-board data buffering and an error-correcting air protocol provide smooth data flow and simplify the task of integration with existing applications.

900 MHz DNT900 — The 900 MHz ISM band allows license-free use in the US, Canada, South America, Australia and New Zealand.

2.4 GHz DNT2400 — 2.4 GHz ISM band allows the DNT2400 to be used license-free world-wide.

Highly Reliable and Secure FHSS Capabilities at Very Low Cost

• RFM proprietary frequency hopping technology provides both robust communications reliability and interference rejection while minimizing multi-path fading
• 40+ mile range (DNT900) and 5+ mile range (DNT2400) with omni-directional antennas (antenna height dependent)
• AES-128 Encryption allows the most sensitive data to be securely sent wirelessly
• Support for point-to-point, point-to-multipoint, and peer-to-peer applications
• Low cost provides substantial cost savings over existing long-range radios without compromising features or radio performance
• Non-volatile memory stores DNT module configuration when powered off
• Dynamic TDMA slot assignment that maximizes throughput and CSMA modes that maximizes network size
• Transparent ARQ protocol with data buffering ensures data integrity
• Simple serial interface handles both data and control at up to 460.8 kb/s

The DNT Series modules provide a selection of over-the-air data rates and transmit power levels thus allowing one module to work for many products. When using the DNT Series, designers can be confident that the radio performance can be modified if needed when the design is finished without having to design-in another radio.

• Configurable RF Data Rates from 38 kb/s and 500 kb/s • Multi-point, point-to-point, peer-to-peer and store & forward repeating
• DNT900 configurable RF Transmit Power of 1 mW to 1W • Bandwidth Allocation
• DNT2400 configurable RF Transmit Power of 1 mW to 100 mW • Configurable Frequency Hopping Rate
• 40+ mile range DNT900, 5+ mile DNT2400 with omni-directional antennas • Analog and Digital I/O
• Co-Located Network Support
• Sleep Modes

Fast-track Your Designs...
Order Your Developer Kit Today!

RFM RF Modules Developer Kits include the technology hardware and software to support the development and integration of RFM RF Modules into any machine-to-machine (M2M) application.

Fast-track Your Designs...
Order Your Developer Kit Today!

RFM RF Modules Developer Kits include the technology hardware and software to support the development and integration of RFM RF Modules into any machine-to-machine (M2M) application.

The RFM SEM Ethernet Bridges are Class I, Div. 2 certified in both the 900 MHz and 2.4 GHz bands. SEM bridges include a standard 10/100 Base-T Ethernet port, antenna, and power connectors. Five LEDs indicate power status and data activity. Class I Div 1 versions are available by special order.

The SEM “D” model Ethernet radio is a DIN rail mount version, and the SEM “X” models use a remote, weatherproof, wireless Ethernet radio housed in a NEMA 4X / I.P. 66 enclosure.

900 MHz SEM Ethernet Bridges — RFM SEM wireless 900 MHz Ethernet bridge is a high speed/long range wireless networking product that provides 172.8 kb/s over-the-air data rate and over 20 miles demonstrated communications range with 3 dB omni-directional antenna. Uses for a SEM wireless 900 MHz Ethernet bridge include SCADA networks, PLC networking, and other industrial automation or data collection applications.

2.4 GHz SEM Ethernet Bridges — The SEM2410 and SEM2411 link Ethernet nodes in an industrial communication hierarchy up to 5 miles apart (with gain antennas). The over-the-air data rate for the SEM2410 is 460 Kb/s and 1.23 Mb/s for the SEM2411. RFM patented FHSS assures reliable performance even in high-multi-path and noisy RF environments.

Ethernet Radio Security — RFM SEM wireless Ethernet bridges provide multiple levels of security. First, their communications use RFM proprietary frequency hopping spread spectrum (FHSS) protocol, which is understood only by other SEM Ethernet radio devices configured to use the same hopping pattern (out of 64 possibilities). To ensure that the SEM master communicates only with its intended SEM slaves, the SEM master can be configured to define the precise number of slaves (up to 62) that can register on the network, and can also be configured to authenticate an ID and password from each SEM slave prior to granting registration. Finally, SEM Ethernet radios include password protection for both console port and Telnet sessions, and can be configured to allow the opening of Telnet sessions only from specified IP addresses.

*Boxed products based on WIT910, WIT934, and WIT2411 modules are not RoHS compliant.

RFM FHSS technology — Patented FHSS technology provides reliable communications in high noise floor environments, superior jamming and interference immunity. CRC checking and automatic repeat request (ARQ) deliver error-free data.

Serial to Ethernet connectivity — Allows transparent communication with remote devices and network-based applications. Allows limited intelligence and legacy serial devices to appear as nodes on an Ethernet network.

Customizable operation — All parameters are configurable under software control. Even transmit power can be selected through a straightforward command set.

Suited to tough environments — All SNAPs are available in "D" DIN rail mount versions and "X" remote radio versions for harsh and outdoor use.

*Boxed products based on WIT910, WIT934, and WIT2411 modules are not RoHS compliant.