| Services Available | |
|---|---|
| Repair | No |
| Calibration | No |
| Free Support | No |
概览
RF411 射频电台的操作频段是920 到 928 MHz，适用于澳大利亚和以色列。RF411的功率只有100 mW，可发送数据到另一个RF411 电台、RF431 电台、CR211(X) 数据采集器或AVW211 振弦接口。
RF411 支持 点-点 或 点-多点 的通讯方式。当连接到数据采集器时，RF411可作为野外modem/电台；当连接到计算机时，可作为基站modem/电台。这种电台还可以作为独立工作的射频 路由器/转发器。
优势与特点
- Rugged, low-cost transceivers
- Can be used in the field as a transceiver or in the office as the base station
- Transmits up to one mile with omnidirectional antenna; up to 10 miles with higher gain directional antennas at ideal conditions
- Settings stored in non-volatile memory
- RS-232 port for connecting to a computer; CS I/O port for connecting to a data logger
- Frequency-hops over 25 channels avoids interference from other spread-spectrum radios
- Optional extended temperature testing
- Faster communication due to elimination of some small "link state packets"
- Ability to have stand-alone RF router/repeaters (up to 8 repeaters)
- Greater immunity to interference and RF collisions by using RF retries
- Reduced power consumption by the data logger, as the radios perform "packet address filtering"
- Built-in setup menus allow access to advanced functionality
- Designed for use in PakBus networks
图像
相似产品
技术说明
通过提供用户可选择的频段跳频模式，RF411减小了来自其它射频设备的无线电干扰的敏感性。射频电台在相对宽波段的频带上，传播正常的窄波段信息讯号。这种处理方法使得通讯噪声更低，和更不易受无线电源的干扰，例如寻呼机和蜂窝电话。
产品规格
| Operating Frequency | 920 to 928 MHz |
| Type | Frequency Hopping Spread Spectrum (FHSS) Transceiver |
| RS-232 Data Rate | 38.4k, 19.2k, 9600, 4800, or 1200 bps |
| Channel Capacity | 65,000 Network Identifiers share 25 hop channels. |
| Frequency Hopping Patterns | Six different selectable patterns |
| Receiver Sensitivity | -110 dBm at 10-4 bit error rate (Campbell Scientific protocols will issue retries wherever a bit error occurs.) |
| Interference Rejection | 70 dB at pager and cellular phone frequencies |
| Transmitter Power Output | 100 mW (nominal) |
| Antenna Connector | Reverse polarity SMA |
| FCC ID | OUR9XTREAM |
| Power | 9 to 16 Vdc |
| LEDs | Power on, TX, RX, diagnostics |
| RS-232 Connector | 9-pin “D” female (4 wire: Tx, Rx, CTS, GND) |
| CS I/O Connector |
9-pin “D” male Newer dataloggers supply power to the RF411 radio on this connector. Dataloggers purchased before December 1997 require the pn 14291 Field Power Cable. |
| Power Connector | Barrel plug, center positive 12 V (used to connect the 14291 Field Power Cable) |
| Maximum Nodes in Network | 50 |
| Standard Operating Temperature Range | -25° to +50°C |
| Extended Operating Temperature Range |
-55° to +85°C The push button that allows you to check/edit programmable settings while the radio is connected to a computer may not operate at temperatures colder than -25°C. |
| Dimensions | 11.4 x 7.0 x 2.9 cm (4.9 x 2.8 x 1.2 in.) |
| Weight | 227 g (8 oz) |
Average Current Drain |
|
| Standby | < 1 mA (power-saving options used) |
| Receiving | 24 mA |
| Transmitting | < 75 mA |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
数据采集器
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | ||
| CR1000X | ||
| CR10X (retired) | ||
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR300 | ||
| CR3000 (retired) | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) | Although the CR9000 and CR9000X are compatible, RF411 radios do not support their fastest communication rates, and are therefore not practical for many CR9000(X) applications. |
Additional Compatibility Information
Communications
Internal Radio of CR211(X) Dataloggers
The RF411 spread spectrum radio can communicate with the internal spread spectrum radio of our CR211(X) dataloggers. Certain RF411 settings must match the CR211(X) settings for communications between the radio and data logger to be successful. The factory default settings of these devices may not match; therefore, they may need to be reconfigured before communications can take place. For more information, refer to the Quick Reference Guide for Setting Up RF401-to-CR206 Communication application note (see Documents).
Other Spread-Spectrum Radios
The RF411 radios can be used in networks containing RF431 and RF410 radios. When RF411 radios are used in networks containing RF400 radios, the Protocol must be set to Transparent. Also, if RF410 and RF411 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 RF411 radios with Net Addresses of 0, 1, 2, and 3, respectively. The RF410 Net Address of 60 interferes with all RF411 Net Addresses.
Campbell Scientific does not recommend using the RF411 in networks containing FGR-115 or RF450 radios.
Transparent and PakBus Protocols
Do not mix RF411 radios set to the Transparent protocol with RF411 or RF431 radios set to either of the PakBus protocols, since this will produce RF traffic without any RF communications. However radios with the PakBus Aware and PakBus Node settings can coexist in the same network (i.e., some radios set to PakBus Aware and some radios set to PakBus Node).
Enclosure Considerations
A desiccated, non-condensing environment is required. The 14162 Mounting Kit includes hardware for securing the RF411 to an enclosure backplate (see Ordering Info).
下载
RF401 Series OS v.04 (646 KB) 14-08-2008
Current RF401, RF411, RF416 firmware. Requires the Device Configuration Utility.
常见问题解答
RF411: 5
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The RF411 is a 100 mW, 920 to 928 MHz radio that requires true line of sight. In a dry environment, with absolutely no physical obstruction to impair the line-of-sight path, and with the proper and elevated antennas, the expected range is up to 10 miles.
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Yes. The BMP5 Direct SDK can communicate with the data logger as long as two conditions are met:
- The communications link between the data logger and the computer is transparent.
- There are no excessive delays.
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These radios ship with an SC12 serial cable and a 10873 RS-232 cable.
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Antenna selection depends on multiple criteria:
- Consider how many stations a particular station needs to communicate with. For remote stations in communication with only one repeater or base station, a directional or Yagi antenna may be an appropriate choice. In contrast, repeater stations that receive data from many different locations will probably require an omnidirectional antenna.
- Consider if a high-gain antenna is needed to overcome the path between two points. Higher-gain antennas are larger and more expensive.
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.