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The NL900 and NL2400 stand-alone
transceivers can be set up in minutes to virtually cut the
cables between RS232/RS485/RS422
devices. Their flexibility and price allow users to quickly
upgrade wired terminals to cordless operation in industrial,
commercial, even residential applications.
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a 1000 mW 900 MHz or a 200 mW 2.4 GHz radio, each unit is
small and easily portable for use in mobile and temporary
settings as well as for fixed installations. Optional
software enables custom configurations based on user needs.
These units implement a
proprietary communication protocol to provide secure local
data transmissions. Because it uses FHSS technology, the
data remains reliable over distances of up to 20 miles
line-of-sight (900MHz) Use of license free frequency bands
ensures that the NL900 & NL2400 are ready to use with no
further certification requirements.
NL900 LAN
The NL900 LAN provides a
complete hardware and software solution for adding wireless
network connectivity to serial-based applications . The
transceiver serves as a conduit between the user and
multiple destination devices via a local network or the
Internet. Controlling distant OEM networks is as easy as
accessing the ‘Net.
Unlike other industrial
wireless Ethernet offerings, NL900LAN does not require a COM
port director. All software controls communicate directly to
the device, greatly improving system latency. And the
NL900LAN will support a wireless Ethernet-to-serial bridge
to allow separate networks to talk with one another
simultaneously.
RF Protocol
Acknowledgement (ACK)
Transmitted packets are successfully acknowledged. If not,
they are resent until successful (user selectable number of
retries). Error detection is used and duplicate data
filtered out before sending to the host interface. Optional
full duplex control setting allows equal time for
transmitting and receiving data at the RF level, keeping a
single transmitter from dominating the system bandwidth.
RF Addressing Modes
Unicast (one-to-one addressing)
Broadcast (one-to-many addressing)
RS232 Transparent Protocol
Change configuration
commands, Configuration can be changed through a
command/data interface signal or AT commands.
Change-on-the-fly parameters include base or remote
designations, destination MAC address, channel number (to
communicate with a different base), enter/exit low-power
modes, etc. Custom settings are available by user request.
Data Encryption Standard (DES)
DES uses an established algorithm and a
56-bit key stored in onboard EEPROM. to protect data.
Available in 900 MHz version only.
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