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Digi XBee® SX RF Modems

1-Watt industrial-grade 900 MHz RF modem with best-in-class range and power consumption for wireless cable replacement

 
  • Adjustable output power up to 1-Watt achieves up to 65 mile range with high gain antenna
  • Interfaces options include RS-232, RS-485, USB, Analog I/O and Digital I/O
  • DigiMesh networking topology for redundancy and reliability
  • 256-bit AES encryption for secure data communications
  • Rugged metal enclosure and -40º C to +85º C operating temperature for industrial applications
  • Fully certified for use in free, unlicensed 900 MHz band

When you need to punch through noisy environments and cover long distances, Digi XBee SX 1-Watt 900 MHz RF modems provide a combination reliability and redundancy for integrators building low-power, mission-critical wireless systems. With interface options including RS232/485 or Digital/ Analog I/O, these modems utilize the DigiMesh® wireless networking protocol, with redundant mesh network operation and support for low-power sleeping nodes.

Customers that don’t require mesh network architecture can configure the modem to operate in simple point to multipoint mode. With ideal RF line-of-sight range estimated up to 65 miles and strong interference blocking, these modems are ideal for applications requiring a reliable, redundant wireless cable replacement over longer ranges.

The Digi XBee SX modems can be configured easily via the USB port, using Digi’s free XCTU software. They are precertified for use in multiple countries and provide secure, reliable delivery of critical data between devices with 256-bit AES encryption.

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Specifications Digi XBee SX RF Modems
PERFORMANCE
INDOOR/URBAN RANGE Up to 18 km (11 mi)* at low data rate
OUTDOOR/RF LINE-OF-SIGHT RANGE Up to 105 km (65 mi)** at low data rate
TRANSMIT POWER Up to 30 dBm software selectable
RF DATA RATE (SOFTWARE SELECTABLE) Low data rate: 10 kbps; Middle data rate: 110 kbps; High data rate: 250 kbps
RECEIVER SENSITIVITY Low data rate: -113 dBm; Middle data rate: -106 dBm; High data rate: -103 dBm
RECEIVER IF SELECTIVITY Low data rate: 40 dB @ 250 kHz; 50 db @ 500 kHz
Middle data rate: 30 dB @ 250 kHz; 40 db @ 500 kHz
High data rate: 30 dB @ 500 kHz; 45 db @ 1000 kHz
RECEIVER RF SELECTIVITY Below 900 MHz and above 930 MHz: >50 dB
NETWORK AND SECURITY
FREQUENCY RANGE ISM 902 MHz to 928 MHz
SPREAD SPECTRUM Frequency hopping
SUPPORTED NETWORK TOPOLOGIES Mesh, Point-to-point, Point-to-multipoint, Peer-to-peer
MODULATION Gaussian Frequency Shift Keying (GFSK)
ENCRYPTION Optional 254-bit Advanced Encryption Standard (AES) cipher block chaining (CBC) Encryption
ANTENNA
CONNECTOR RPSMA
ANTENNA IMPEDANCE 50 Ω unbalanced
INPUT LEVEL AT ANTENNA PORT Maximum 6 dBm
POWER REQUIREMENTS
SUPPLY VOLTAGE RANGE 7-30 VDC
TYPICAL SUPPLY VOLTAGE 12 V
RECEIVE CURRENT 20 mA (@12V)
TRANSMIT CURRENT 300 mA (@12V)
SLEEP CURRENT 5 mA (@12V)
PHYSICAL PROPERTIES
SIZE 4.5 in x 2.75 in x 1.125 in (11.4 cm x 7 cm x 2.9 cm)
WEIGHT 5 oz (142 g)
DATA CONNECTION Female RJ-45 (RS232/485), 10-pin screw terminal (4 digital, 4 analog, GND, 12 VDC output), USB mini-B (configuration port)
OPERATING TEMPERATURE -40° C to +85° C (Industrial)
REGULATORY APPROVALS
FCC (U.S.A) MCQ-XBPSX
IC (CANADA) 1846A-XBPSX
C-TICK (AUSTRALIA) RCM
ROHS Compliant
ANALOG INPUTS
ABSOLUTE VOLTAGE RATING Maximum: 11 V; Minimum: -.05 V (each pin)
OPERATING INPUT RANGE Single-ended voltage mode: 0 - 10 VDC
Current loop mode: 4 - 20 mA
Differential voltage mode: ± 4 VCD
IMPUT IMDEDANCE Single-ended voltage mode: 13300 Ω
Current loop mode: 120 Ω
Differential voltage mode: ~1 MΩ
RESOLUTION 10 bits
ACCURACY .5% at 25º C
DIGITAL INPUTS
INPUT TYPE Non-inverting Schmitt trigger gate
POSITIVE-GOING SWITCHING THRESHOLD 2.5 V
NEGATIVE-GOING SWITCHING THRESHOLD 1 V
ABSOLUTE VOLTAGE RATING Maximum: 31 V; Minimum: -.05 V (each pin)
IMPUT IMDEDANCE ~1 MΩ
DIGITAL OUTPUTS
OUTPUT TYPE Open collector sinking driver
MAXIMUM SINK CURRENT 200 mA
MAXIMUM SUPPLY VOLTAGE 31 V (for external pull-up resistor)
RESISTOR PULL-UPS 10 kΩ pulled up to 3.3 VDC

* We estimate rural ranges based on a 14.5 km (9 mi) range test with dipole antennas.
**Range estimated assuming that the urban noise floor is approximately 15 dB higher than rural. The actual range depends on the setup and level of interference in your location.

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