Resumen
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:
Ventajas y características
- 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
Imágenes
Ficheros CAD:
Preguntas frecuentes
Número de FAQs relacionadas con RF427: 3
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CustomMenu instructions apply to the CR1000KD, CR850, and CR3000 display. Custom menus are not displayed or passed through to the terminal interface.
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In OS 24 (CR6 OS 01) and later, a user can change constants from the CR1000KD or a terminal emulator without touching the program. The program must contain a ConstTable/EndConstTable construction for this to occur. Because the program does recompile, collect the data first.
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Although it is recommended to use software such as Short Cut for programming, the CR800-series, CR1000, and CR3000 dataloggers can be programmed with the CD100, CR1000KD, or integrated keypads. The keypad can be used to create new programs or edit programs that already exist in the datalogger memory.
From the CD100 or CR1000KD home screen, follow these steps to get started:
- Press Enter.
- Select File and press Enter.
- Select either New or Edit.
- To modify an existing instruction, select the instruction, and press Enter.
- To add a new instruction, press Ins, and select Instruction.
Compatibilidad
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.
Especificaciones
| Radio Type | Frequency Hopping Spread Spectrum (FHSS) |
| Frequency | 905/920 MHz |
| Country Used In | Brazil |
| Transmission Distance |
|
| 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 |
| Maximum Nodes in Network | 50 |
| Current Required |
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| Communication Ports |
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| 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 |
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Certifications |
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| Brazil (ANATEL) | 08335-17-10644 (standards in Resolution No. 506) |
Documentos
Documentos técnicos
Descargas
RF407, RF412, and RF427 Frequency Mask Calculator Spreadsheet v.1.0 (37 KB) 09-04-2025
The Frequency Mask Calculator lets you disable specific frequencies by setting their value to 0 in the MASK column. The resulting RF4XX frequency mask is then entered into your RF4XX settings, as directed in the calculator.