RS-232 Wireless Bridge USERS MANUAL R02
Contents Overview ....................................................................................................................................................... 3 Specifications ................................................................................................................................................ 3 Performance ............................................................................................................................................. 3 Power Requirements ...
Overview The RS-232 wireless bridge is designed to be a transparent bidirectional three-wire RS-232 cable replacement. The RS-232 Wireless Bridge has a DB9 DCE female connector for data and for the internal radio module configuration, and a micro USB port to configure settings that are specific to the RS-232 Wireless Bridge. The RS-232 Wireless Bridge is available in three different options differing by frequency and RF power output. It is possible to mix and match Wireless Bridge products.
Power Requirements 24LP 24HP 09SX INPUT VOLTAGE 7-30VDC 7-30VDC 7-30VDC TRANSMIT CURRENT 12mA @ 12V 40mA @ 12V 270mA @ 12V RECEIVE CURRENT 12mA @ 12V 12mA @ 12V 17mA @ 12V Table 2. Power Requirements Mechanical Fig. 1 Mechanical Dimensions RS-232 WIRELESS BRIDGE USER’S MANAUL REV.
The mechanical dimensions for the Wireless Bridge are shown in Figure 1. The mechanical dimensions are shown with the optional DIN rail mount bracket which is not included with the standard part number. Mechanical data for the antenna is not shown. Pinout and Wiring The pinout follows the standard RS-232 Data Communications Equipment (DCE) device. Signal names for RS-232 are defined from the standpoint of a Data Terminal Equipment (DTE) device.
Fig 3. Wireless Bridge Connectors and Pins Operation Standard Operation The RS-232 Wireless Bridge is designed to be data transparent. By default, any data sent into one device is broadcast and received by all other Wireless Bridge devices within range. Any device that receives the transmitted data packet will send the received data out the serial port to its host. Without any configuration the Wireless Bridge will operate in a point-to-point or point-to-multipoint mode.
Data Formats and Baud Rates The default baud rate and data format is 9600 baud, 8 data bits, no parity and one stop bit. The baud rate and data format can be adjusted by adjusting the BD and NB parameter of the radio module (See the Changing the Baud Rate section). If the data of the sending or receiving devices do not correspond with the data settings of the Wireless Bridge then the output data will appear garbled. Common Configurations and Use Cases Radio Architectures Point-to Point Fig.
Point-to-Multipoint Fig. 5 Point-to-Multipoint Configuration Figure 5 shows a typical point-to-multipoint configuration. By default, all the Wireless Bridge devices will broadcast their data meaning that point-to-multipoint mode will work without any configuration. If there is the potential for other Wireless Bridge networks to be in the same area, then all devices in a given network may want to be set to a non-default PAN ID. RS-232 WIRELESS BRIDGE USER’S MANAUL REV.
Communicating with the Wireless Bridge The Wireless Bridge device can be connected to a PC through the micro USB port. Figure 6 shows the device manager view of an example connected device. Note that a single device shows up as two separate COM ports. In Figure 6, the COM ports are COM43 & COM44. The COM port numbers will vary from machine to machine depending on what COM port device drivers have been previously installed. Fig.
Fig. 7 Data and Information Terminals RS-232 Command Reference Table Main command help info set & get ver Function Command Name Command Description Default Value Displays list of main NA commands Displays device serial number NA Restores factory default defaults NA settings. Enables JSON output format pkts.en when used with an ADIO 0 Wireless Bridge Stores settings to non-volatile store NA memory. Changes the host to internal radio baud rate. This uart.
Figure 8 lists the available commands for the RS-232 Wireless Bridge. The help, ver & info commands are issued at the command prompt and have no function commands or parameters. Set and get are used to set and read values for the various commands. Figure 9 shows an example of issuing the different commands in a terminal program. Fig. 9 Terminal Session Command Example Changing the Baud Rate The Wireless Bridge device is made up of two main components: 1. The host processor 2.
Step 1: Using the X-CTU program, the XBee radio module is discovered on the data port – in this case COM43. The baud rate is changed to 115200. The “Write” button is used to store the setting. Fig. 10 X-CTU Baud Rate Setting Step 2: On the Wireless Bridge information terminal (COM44 in this example) the set uart.rate 115200 is issued followed by set store. RS-232 WIRELESS BRIDGE USER’S MANAUL REV.
Fig. 11 Uart Rate Setting Example Configuring the XBee Module The RS-232 wireless bridge utilizes the Digi XBee module. Consequently, all radio settings can be read or set with Digi AT commands or Digi X-CTU software. As a general rule the only commands that might need be set are the Networking and Serial Interfacing commands. Any I/O commands or other features are not used. See Digi’s website at www.digi.com and the XBee user manual and discussion forums for more information.
Antennas The Wireless Bridge uses an RP-SMA Female connector. The Wireless Bridge is approved to be used with any 2.1dBi RP-SMA Male antennas that are frequency compatible. Datawave antenna part numbers include: Part Number: ANT-2400-RP-2-A (2.4 GHz for the 24LP & 24HP variants) Part Number: ANT-900-RP-2-A (900 MHz for the 09SX variant) Part Numbers and Compatibility The RS-232 Wireless Bridge comes with three basic options depending on range requirements. The 24LP and 24HP operate at 2.
Certifications United States (FCC) The Datawave Wireless Bridges comply with Part 15 of the FCC rules and regulations. Compliance with the labeling requirements, FCC notices and antenna usage guidelines is required. FCC notices IMPORTANT: The RF device has been certified for remote and base radio applications. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
