The RF411A is a 900 MHz radio designed for license-free use in several countries, including Australia and New Zealand. It provides a hassle-free way to create long-distance wireless links between your computer, data loggers, and measurement devices. The RF411A has a 920 to 928 MHz operating-frequency range and a configurable transmit-power output of 5 to 250 mW.
The RF411A is compatible with all of its RF400-series radio predecessors, including the RF410, RF411, and RF431. This also means that it is compatible with the CR210, CR211(X), and AVW211.
Note: The RF411A radios are recommended for existing installations that require compatibility with products such as the RF411, CR211, and AVW211. For new installations, Campbell Scientific recommends using the RF412 or RF451.Read More
The RF401-series and RF430-series spread-spectrum radios are similar. The models in these two series differ in their ports used for connecting to computers/data loggers, in their frequencies, and in their transmitting power. Refer to the following table for specifics.
|RF411 (retired)||RF411A||RF431 (retired)||RF416||RF432 (retired)|
|Frequency||910 to 918 MHz
US & Canada
|920 to 928 MHz
Australia & New Zealand
|2.450 to 2.482 GHz|
|CS I/O Ports|
|Transmitting Power||100 mW||250 mW||100 mW||100 mW||250 mW||100 mW||50 mW||50 mW|
The RF411A is a frequency hopping spread spectrum radio designed for 900 MHz license-free ISM band operation. It has a 920 to 928 MHz operating-frequency range and a configurable transmit power output of 5 to 250 mW. It provides one of three selectable active connections including CS I/O, RS-232, and USB. It has a reverse polarity SMA (RPSMA) antenna jack connection. It is over the air compatible with legacy 9XStream products including the RF410, RF411, RF431, CR210, CR211(X), and AVW211.
|Radio Type||Frequency Hopping Spread Spectrum (FHSS)|
|Frequency||920 to 928 MHz|
|Country Used In||Australia, New Zealand|
|Power Output||5 to 250 mW (software-selectable)|
|Receiver Sensitivity||-109 dBm (Campbell Scientific protocols will issue retries wherever a bit error occurs.)|
|Channel Capacity||7 hop sequences share 25 frequencies.|
|RF Throughput Data Rate||9.6 kbps|
|Data Rate||10 kbps|
|Antenna Connector||Reverse Polarity SMA (RPSMA) jack|
|LEDs||Power on, Tx, Rx, diagnostics|
|RS-232 Baud Rate||1200 to 115200 bps|
|CS I/O Modes||SDC 7, 8, 10, 11, and ME master|
|Average Current Drain||
|Power||9 to 16 Vdc|
|Power Connector||2.5 mm DC power jack|
|Operating Temperature Range||
|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)
Dimensions are from the tip of antenna connector to other side of case, and from the bottom of case to the top of 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|
|C-TICK Australia||Yes, N3013|
The RF411A is over the air compatible with the RF411, RF431, CR211, CR211X, and AVW211.
The RF411A is also compatible with the RF410 and CR210, but the communication protocol must be set to transparent. Also, if RF410 and RF411A radios will be in the same RF proximity, do not use 28, 44, 52, 56, or 60 for the RF410 Net Address. RF410 radios with Net Addresses of 28, 44, 52, and 56 interfere with RF411A radios with Net Addresses of 0, 1, 2, and 3, respectively. The RF410 Net Address of 60 interferes with all RF411A Net Addresses.
Campbell Scientific does not recommend using the RF411A in networks containing FGR-115 or RF450 radios.
Do not mix RF411A radios using the Transparent protocol setting with RF411A, RF411, RF431, CR211(X), or AVW211 devices using a PakBus protocol setting. This will produce unsuccessful RF traffic. However radios with the PakBus Aware and PakBus Node settings can coexist in the same network.
|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 RF411A's RS-232 port.
Current RF401A and RF411A firmware. Requires the Device Configuration Utility.
A software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package.
Supported Operating Systems:
Windows 11, 10, 8.1, 8, and 7 (Both 32 and 64 bit)
Number of FAQs related to RF411A: 6
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The RF401A and RF411A have distinct advantages over their predecessors, including greater maximum transmit power, lower average power consumption, improved packaging, and the inclusion of USB, RS-232, and CS I/O on a single device.
These radios ship with an SC12 serial cable and a 10873 RS-232 cable.
The USB device driver for this product has been packaged with the Device Configuration Utility. Please ensure that you are using the latest version of the Device Configuration Utility.
Antenna selection depends on multiple criteria:
To help with antenna selection and site placement, consider renting and using a demo kit to test the pathway quality. Campbell Scientific offers a 900 MHz demo kit for the RF401, RF430, CR206X, and AVW206, as well as a demo kit for the RF450. Contact Campbell Scientific for assistance.
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.