The RF412 is a high-speed 900 MHz serial radio designed for unlicensed operation in several countries, including Australia and New Zealand. The RF412 is a 915 to 928 MHz frequency-hopping spread-spectrum radio with a configurable transmit-power output of 5 to 250 mW and software-selectable channel masking for improved RF interference immunity. This power-sipping, yet speedy, radio provides a cost-effective way to network data loggers.
The RF412 is part of the RF407 series of radios that includes:
Note to RF411A users: The RF411A is factory upgradeable to an RF412. Contact Campbell Scientific for a Returned Material Authorization (RMA).
|Radio Type||Frequency Hopping Spread Spectrum (FHSS)|
|Frequency||915 to 928 MHz|
|Country Used In||Australia, New Zealand|
|Power Output||5 to 250 mW (software-selectable)|
|Receiver Sensitivity||-101 dBm|
|Channel Capacity||Eight 25-channel hop sequences sharing 31 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|
|Average Current Drain||
|Service Requirements||Shares frequency with other devices. Must not cause harmful interference to licensed radios. Requires line-of-sight.|
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.
|United States (FCC Part 15.247)||MCQ-XB900HP|
|Industry Canada (IC)||1846A-XB900HP|
The RF412 is over-the-air compatible with other RF412-based products. The RF412 can only communicate wirelessly with other RF412 radios and other Campbell Scientific products that have the "-RF412" option.
The RF412 is not over-the-air compatible with the RF411A. However, the RF411A is factory upgradeable to an RF412. Contact Campbell Scientific for a Returned Material Authorization (RMA).
|Data Logger||RS-232||CS I/O|
|Mixed-array data loggers||**|
*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 RF412's RS-232 port.
Number of FAQs related to RF412: 1
If you have an RF401/RF401A/RF407/RF411A/RF412/RF427 network that has been working reliably for months and then suddenly fails with intermittent data collection, the site hasn’t changed, and there hasn’t been any new construction in the area, the issue may be caused by a piece of new equipment that was installed on the job site during the COVID-19 pandemic.
Because of the COVID-19 pandemic, some job sites implemented badge sensor technology for contact tracing and social distancing. Often, these devices operate on Wi-Fi or Bluetooth, but some of them operate in the 900 MHz range, which is used by our spread-spectrum radios and can, therefore, cause interference. Fortunately, you can resolve this issue using radio channel masking.
The following outlines the steps that were taken to correct this issue in one specific example:
For more detailed information about using radio channel masking, refer to your spread-spectrum radio manual. For example, the RF407-Series manual has a section devoted to this topic.