RF411

Name: RF411
Brand: Campbell Scientific
SKU: RF411
Availability: Discontinued

922-MHz Spread-Spectrum Radio

RF411

End of lifeConfigurable

922-MHz Spread-Spectrum Radio

Pricing

Model:: RF411
Item Number:: RF411
Warranty:: 1 year
Lead time:: 21 days

Overview

The RF411 has a 920 to 928 MHz frequency range, which is used in Australia and Israel. This 100 mW spread-spectrum radio can transmit data to another RF411 radio, an RF431 radio, a CR211(X) datalogger, or an AVW211 interface.

The RF411 supports point-to-point and point-to-multipoint communications. It can serve as a field modem/radio while connected to the data logger or as a base station modem/radio while connected to a computer. The radio can also serve as a stand-alone RF router/repeater.

Technical Description

The RF411 reduces susceptibility to RF interference from other spread spectrum devices by providing user-selectable frequency hopping patterns. Spread spectrum radios spread the normally narrowband information signal over a relatively wide band of frequencies. This process allows communications to be more immune to noise and interference from RF sources such as pagers and cellular phones.

Benefits

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

Specifications

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)