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© 2012 by RF Monolithics, Inc. DN-2400 Series - 07/30/12
DN-2400
Series
Rating Value Units
Power Supply Input Voltage Range -0.5 to +24 V
Non-Operating Ambient Temperature Range -40 to +85 oC
DN-2400 Series Absolute Maximum Ratings
DN-2400 Series Specifications
Characteristic Sym Notes Minimum Typical Maximum Units
Operating Frequency Range 2409.3 2467.1 MHz
Hop Dwell Time 5 200 ms
Number of FHSS Subbands 9
Number of RF Channels in a Subband 15 or 37
Modulation FSK/MSK
RF Data Transmission Rates 38.4, 115.2, 200 and 500 kbps
Standard Antenna Internal 6 dBi directional antenna
Receiver Sensitivity through 6 dBi Antenna:
10-5 BER @ 38.4 kb/s -110 dBm
10-5 BER @ 200 kb/s -100 dBm
10-5 BER @ 500 kb/s -96 dBm
EIRP Output Power Levels through 6 dBi Antenna: 4, 40, 250 mW
2.4 GHz
Wireless
Serial
Modems
The DN-2400 series 2.4 GHz serial modems provide ready-to-use solutions for robust wire-
less data communications in the 2.4 GHz ISM band. There are currently three products in
the DN-2400 series, the DN-2400G, the DN-2400I and the DN-2400U. The DN-2400G pro-
vides an RS-232C serial interface. The DN-2400I offers a two-wire, multi-drop RS-485
interface plus a selectable RS-232C interface for configuration programming. The DN-2400U
provides a USB interface. DN-2400 series modems are based on RFM’s DNT2400 frequency
hopping spread spectrum (FHSS) transceiver, and can communicate with other
DNT2400-based RFM products as well as customer developed products. DN-2400 series mo-
dems consist of a radio module in a NEMA 4X/IP66 waterproof case connected to a serial in-
terface adapter by a power and signal cable that allows the radio module to be located
remotely at a point of good RF propagation. DN-2400 series modems are well-suited for serial
data networks carrying moderate traffic that need robust communications in locations with
non-ideal RF propagation and/or where RF interference or noise are present.
- 2.4 GHz RS-232C, RS-485/RS-232C and USB Serial Modems
- Optional 128-Bit AES Encryption
- Point-to-point, Point-to-multipoint, Peer-to-peer and
Tree-routing Network Capabilities
- Frequency Hopping Spread Spectrum Transceiver
- Transceiver Housed in a NEMA 4X/IP66 Waterproof Case
- RF Data Rate Configurable from 38.4 to 500 kbps
- Transmitter Power up to 250 mW EIRP using Internal Antenna
- FCC and Canadian IC Certified for Unlicensed Operation
Preliminary
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© 2012 by RF Monolithics, Inc. DN-2400 Series - 07/30/12
Characteristic Sym Notes Minimum Typical Maximum Units
Optional External Antenna Connector Reverse TNC (RTNC)
External Antenna Impedance 50 ohms, VSWR < 3:1
Direct Receiver Sensitivity through RTNC Connector:
10-5 BER @ 38.4 kb/s -104 dBm
10-5 BER @ 200 kb/s -96 dBm
10-5 BER @ 500 kb/s -90 dBm
Direct Output Power Levels through RTNC Connector: 1, 10, 63 mW
Network Topologies Point-to-Point, Point-to-Multipoint,
Peer-to-Peer, Tree-Routing
Access Scheme TDMA/CSMA
Number of Remote Nodes, TDMA Mode 1 16
Number of Remote Nodes, CSMA Mode Limited only by traffic density
DN-2400G RS-232C Configuration 9-pin connector, hardware flow control optional
DN-2400I RS-232C Configuration 3-wire, no hardware flow control
DN-2400I RS-485 Configuration 2-wire, multi-drop capable
DN-2400U USB Configuration USB Type B connector
Serial Port Baud Rates 1.2, 2.4, 4.8, 9.6, 19.2, 28.8,
38.4, 57.6, 76.8, 115.2, 230.4, 460.8 kbps
Signal Cable Length Options
(see Ordering Guide on Page 5) 4, 50, 100, 300 ft
DC Power Supply Voltage Range, up to 50 ft signal cable +6 +24 Vdc
DC Power Supply Voltage Range, 50 ft to 300 ft cable +12 +24 Vdc
DC Power Supply Ripple, 1 A load 250 mVP-P
Peak Transmit Mode DC Power 1.1 W
Average Receive Mode Power:
Base, Continuous Data Stream 720 mW
Remote, Linked, No Data 190 mW
Remote, Continuous Data Stream 245 mW
Interface Adapter Nominal Dimensions 3.85 x 1.70 x 0.85 inches
(80x43x22mm)
Radio Module Case Rating NEMA 4X/IP66 outdoor enclosure
Radio Module Nominal Dimensions 5.15 x 5.00 x 1.40 inches
(131 x 127 x 36 mm)
Radio Module Mounting Flange with pre-drilled mounting holes; mount
flange to mast with bolts or hose clamps
Operating Temperature Range -40 85 oC
Operating Relative Humidity Range, Non-condensing 10 90 %
DN-2400 Series Specifications
DN-2400 Series Modem Operation
The DN-2400 series 2.4 GHz modems provide high perfor-
mance, ready-to-use solutions for robust wireless data com-
munications in the 2.4 GHz ISM band. There are currently
three products in the DN-2400 series, the DN-2400G, the
DN-2400I, and the DN-2400U. The DN-2400G provides an
RS-232C serial interface with optional flow control. The
DN-2400I offers a two-wire, multi-drop RS-485 interface plus
a selectable three-wire RS-232C interface for configuration
programming. The DN-2400U provides a USB interface.
DN-2400 series modems are based on RFM’s DNT2400
frequency hopping spread spectrum (FHSS) transceiver,
and can communicate with other DNT2400-based RFM
products, as well as customer developed products.
As shown in Figure 1, DN-2400 series modems consist of a
radio module in a NEMA 4X/IP66 waterproof case with an
internal 6 dBi directional antenna, a signal cable that carries
power and data, and an interface adaptor that includes a
power supply connector and the appropriate serial data con-
nector. The radio module can optionally be provided with a
RTNC antenna connector in lieu of the internal antenna (see
Ordering Guide on Page 5). DN-2400 serial modems with
the RTNC connector are compatible with RFM’s complete
line of 2.4 GHz antennas, allowing extended operating range
where allowed by local regulations.
DN-2400 series modems are supplied with a 110/220 VAC
wall-plug power supply that includes an international plug
set. Optionally, DN-2400 series modems can be powered
from a user-supplied DC source as described in the specifi-
cations table. The signal cable can specified as 4, 50, 100 or
300 feet in length (see Ordering Guide on Page 5), which al-
lows the radio module to be located remotely indoors or out-
doors at a point of good RF propagation. DN-2400 modems
can transmit data from 38.4 to 500 kbps, and the transmitter
output power can be set from 4 to 250 mW EIRP when using
the internal antenna.
DN-2400 series modems are well-suited for serial data net-
works carrying moderate traffic that need robust communi-
cations in locations with non-ideal RF propagation and/or
where RF interference or noise are present. DN-2400 serial
modems can operate in point-to-point, point-to-multipoint,
peer-to-peer and tree routing DNT2400-based wireless net-
works.
DN-2400 data modems are shipped configured to transmit
transparent data, which requires no protocol formatting. All
that is required to set up a transparent point-to-point serial
data link to configure one modem as a base unit using a
simple PC-based utility. DN-2400 series modems can also
operate in protocol mode, which is supported by a rich set of
configuration parameters that allow a wide range of network
layouts and configurations to be optimized.
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© 2012 by RF Monolithics, Inc. DN-2400 Series - 07/30/12
Figure 1
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© 2012 by RF Monolithics, Inc. DN-2400 Series - 07/30/12
Ref Name I/O Description
T +PWR I The center coaxial conductor (tip) is the positive DC power input.
R GND - The outer coaxial conductor (ring) is the DC power ground.
G PWR O Green LED indicates the unit is powered.
A LINK O Amber LED indicates the unit is linked.
DN-2400G Serial Port DB9 Connector Description
Pin Name I/O Description
1 DCD O This pin is an output indicating the modem is linked to the radio network.
2 RADIO_TXD O This pin is the DN-2400G serial data output.
3 RADIO_RXD I This pin is the DN-2400G serial data input.
4 DTR I This pin is the data terminal ready input from the DN-2400G host.
5 GND - This pin is signal ground.
6 - - No connection.
7 HOST_RTS I This pin is the request to send input from the DN-2400G host.
8 HOST_CTS O This pin is the clear to send output from the DN-2400G.
9 - - No connection.
Pin Name I/O Description
1 +PWR I This terminal is the positive power supply input, +6 to +24 V.
2 GND - This terminal is a power supply and signal ground.
3 485 EN I When this terminal is unconnected, serial operation is RS-232C. When this terminal is grounded
to terminal 2 or 4, serial operation is RS-485.
4 GND - This terminal is a power supply and signal ground.
5 TX/A O This terminal transmits data to the host (RS-232C TxD or RS-485 A signal).
6 RX/B I This terminal receives data from the host (RS-232C RxD or RS-485 B signal).
DN-2400G/DN-2400U Power Connector and LED Description
DN-2400I Serial Port Terminal Block Description
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© 2012 by RF Monolithics, Inc. DN-2400 Series - 07/30/12
Note: Specifications subject to change without notice.
Part # M-2400-5000, Rev A
DN-2400 Serial Modem Part Number Ordering Guide
Serial Interface Antenna/Connector
Cable Length, feet
4 50 100 300
RS-232C, DB9 Connector Internal 6 dBi Antenna DN-2400G-4 DN-2400G DN-2400G-100 DN-2400G-300
RS-232C, DB9 Connector RTNC Connector DN-2400GX-4 DN-2400GX DN-2400GX-100 DN-2400GX-300
RS-485/RS-232C, 6-Pin Terminal Block Internal 6 dBi Antenna DN-2400I-4 DN-2400I DN-2400I-100 DN-2400I-300
RS-485/RS-232C, 6-Pin Terminal Block RTNC Connector DN2400IX-4 DN-2400IX DN-2400IX-100 DN-2400IX-300
USB Type B Connector Internal 6 dBi Antenna DN2400U-4 DN-2400U DN-2400U-100 DN-2400U-300
USB Type B Connector RTNC Connector DN2400UX-4 DN-2400UX DN-2400UX-100 DN-2400UX-300
4 . 4 0
( 1 1 2 )
5 . 0 0
( 1 2 7 )
3 . 2 0
( 8 1 )
1 . 4 0
( 3 6 )
5 . 1 5
( 1 3 1 )
4 . 8 0
( 1 2 2 )
=
D N - 2 4 0 0 S e r i e s T r a n s c e i v e r C a s e
D i m e n s i o n s i n
i n c h e s a n d ( m m )
Figure 2
