RF427 905 MHz + 920 MHz Spread-Spectrum Radio

Overview

The RF427 is a high-speed 900 MHz serial radio designed for unlicensed operation in Brazil. The RF427 is a frequency-hopping spread-spectrum radio with a configurable transmit-power output of 5 to 250 mW and user-selectable channel masking for improved RF interference immunity. This power-sipping, yet speedy, radio provides a cost-effective way to network data loggers.

The RF427 is part of the RF407 series of radios that includes:

  • RF407: North America (FCC & IC), 902 to 928 MHz
  • RF412: Australia (ACMA RCM), 915 to 928 MHz
  • RF422: Most of Europe and some of Asia (ETSI), 863 to 873 MHz
  • RF427: Brazil (ANATEL), 905/920 MHz

Benefits and Features

  • Does not require individual operational license in Brazil
  • High-speed serial communication, optimized for PakBus networks
  • Low power (< 2 mA idle) during periods of inactivity
  • Supports point-to-point with RF retries and point-to-multipoint operations
  • Remote diagnostics using PakBus node operations

Images

Glam view
Glam view
Glam view
Front view
Back view
Left view
Right view
Top view
Bottom view

Specifications

Radio Type Frequency Hopping Spread Spectrum (FHSS)
Frequency 905/920 MHz
Country Used In Brazil
Transmission Distance
  • -Note- Transmission distance assumes line-of-sight and appropriate antenna. Line-of-sight obstructions, RF interference, and antenna type will affect transmission distance.
  • Up to 1.61 km (1 mi) with omnidirectional antenna; up to 16.09 km (10 mi) with higher-gain directional antennas at ideal conditions
Power Output 5 to 250 mW (user-selectable)
Receiver Sensitivity -101 dBm
Channel Capacity Eight 25-channel hop sequences sharing 43 available channels
Data Rate 200 kbps
Link Throughput 105 kbps (maximum)
Antenna Connector Reverse Polarity SMA (RPSMA) jack
LEDs Red TX/PWR and green RX
RS-232 Baud Rate 1200 to 115200 bps
CS I/O Modes SDC 7, 8, 10, 11, and ME master
Operating Temperature Range -40° to +70°C
Power 9 to 16 Vdc
Power Connector 2.5 mm DC power jack
Powered Over CS I/O or barrel plug
Current Required
  • Average Transmit: < 80 mA (250 mW TX Power)
  • Receive: 15 mA
  • Sleep: 0.5 mA (depending on power-saving mode)
Communication Ports
  • RS-232 9-pin D female
  • CS I/O 9-pin D male
  • USB Type B jack
Dimensions 11.1 x 6.9 x 2.7 cm (4.4 x 2.7 x 1.1 in.)
Dimension are from the tip of the antenna connector to the other side of the case, and from the bottom of the case to the top of the DB9 connector jack screw. The width includes the thickness of the screw heads on the screws that hold the case together.
Weight
  • 136 g (4.8 oz) without "Ships With" items
  • 283.5 g (10 oz) with "Ships With" items

Certifications
Brazil (ANATEL) 08335-17-10644 (standards in Resolution No. 506)

Compatibility

Communications

The RF427 is over-the-air compatible with other RF427-based products. The RF427 can only communicate wirelessly with other RF427 radios and other Campbell Scientific products that have the "-RF427" option.

Data Logger Considerations

Data Logger RS-232 CS I/O
CR200(X)
CR800/CR850
CR1000
CR3000
CR5000
CR9000(X)
CR300 *
CR6
CR510-PB
CR10X-PB
CR23X-PB
Mixed-array data loggers **

Notes:
*Use a 18663 null modem cable.
**It is possible to connect a mixed-array data logger (e.g., CR10, CR10X, CR23X, 21X, CR7) by using an SC932A or SC105 between the data logger's CS I/O port and the RF427's RS-232 port.