ProxLINK Wireless Modem

ProxLINK Wireless Modem

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ProxLink wirelessly interconnects devices with RS-232 interfaces. Any devices that are interconnected through a standard RS-232 interface and cable at 19.2Kbps or lower can be wirelessly connected with ProxLink. ProxLink is a wireless replacement for the RS-232 cable. ProxLink is resistant to interference and noise from other devices operating in the 902-928MHz ISM band. Multiple ProxLinks can be operated simultaneously in the same facility. ProxLink key features include:

  • Wireless communication for standard RS-232 interfaces

  • Resistant to interference and noise from other devices operating in the band

  • Range up to 1000 ft. (300m) possible

  • Packetized interface offered for custom RS-232 interface protocol applications such as multipoint RS-232 environments

  • Simultaneous operation of multiple ProxLinks

  • Multiple Antenna options to extend range and coverage

  • NEMA enclosures available for harsh environments

ProxLink provides a simple and reliable wireless replacement for any three wire asynchronous (RXD. TXD and GND) RS-232 link running at speeds up to 19.2Kbps. Using spread spectrum technology, the ProxLink provides robust, interference resistant operation which penetrates through walls and other obstructions.

ProxLink offers a working range of up to 1000 feet. The actual range may vary due to differences in physical operating environments.

Spread spectrum technology allows use of these products without a FCC site license. Proxim has certified these products for use as unlicensed spread spectrum devices with the FCC.

The ProxLink supports three modes of operation:

  • Pass-through mode. In pass-through mode the ProxLink unit transmits data as it is received from its serial port and the receiving unit passes the data through its serial port. This is a 'wire-replacement' mode and installation is 'plug and play'.

  • Broadcast mode. Allows one unit to broadcast its messages to multiple units simultaneously. This capability is often used in simultaneously updating messages on multiple number of signs.

  • Packetized Mode. In packetized mode the ProxLink may be dynamically controlled by an external computer using Proxim's packetized command set. This command set includes transmission, configuration and power management features. A common application is the support of multipoint wireless RS-232 functions.

Multiple Antenna options available. Some of them are:

  • High gain omni directional antenna for extended coverage in all dimensions.

  • High gain directional antenna for extended range in a single direction.

  • Vehicle mount antenna for mobile applications.

  • Lightning arrestors for outdoor applications.

  • Optional mounting hardware and custom cable lengths for specialized mounting needs.

In addition, ProxLink's multiple spread spectrum channels and robust CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) protocol allows multiple radios to operate simultaneously without interfering with each other.


  • Easy Installation
    Plug-in and use wireless RS-232 features in minutes

  • No FCC Site Licensing Required
    ISM band spread spectrum operation requires no FCC license

  • Reliable Communication
    ProxLink spread spectrum technology is resistant to interference and noise

  • High Speed RS-232 Communications
    Speeds up to 19.2Kbps available

  • Easy to Configure
    Configurations can be easily modified and saved in EEPROM


Wireless Connected Devices

Remote Data Collection

RS-232 Terminals

Real Time Inventory Control

Bar Code Scanners and Readers

Environmental Monitoring

Personal Computers

Security Systems

Hand Held Data Terminals

Remote Automated Manufacturing Processes

Computer Controlled Robots, PLC and CNC Machine Tools

Remote Printing



Serial Interface
Asynchronous Data Rates 1.2, 2.4, 4.8, 9.6, 19.25 Kbps
Data Format 8NI, 7E1, 701
In band flow control CTS, DSR, XON/XOFF
Connector 9-pin female D connector
Source (regulated) 9V
Transmit current 350mA @ 9V
Typical current 150mA
Antenna 5/8 wave with 3db gain
Package size (w/o antenna) 4.0" x 6.5" x 0.75"
Weight (with antenna) 12 ounces
LEDs Power, Carrier Detect, Receive Data
Temp. (operating/storage) -20C to +60C/-50 to +85C
Relative humidity 20% to 90% (non-condensing)
Operating Modes
Pass-through Transparent to application, off-line
Packetized ProxLink accepts real-time
configuration, message, &
status commands
Message Format Options Line length, delimiters, & input time-out
Network Parameters
Channel Options Radio channel and security
subchannel (16 bits)
Outgoing Messages Point-to-point or broadcast, or all
Packetized Mode Features Standby Mode

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