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Saturday, 25 May 2013
 
 
How to use an addressable RS-232 to RS-485 converter E-mail

Have you ever wished to connect more than one RS232 device to your computer at a time? The addressable RS232 to RS485 converter allows this. Each device can be individually selected and the computer or PLC talks to that device.

For example, you want your computer to talk to 3 printers in different parts of the factory. Wire up the 5258 converters as in the picture. The 5258 connected to printer 1 has its address set to address 1. Similarly for the 5258s connected to printers 2 and 3.

To select a printer a command is sent. This can be either the STX (02HEX) control character, or HeAdEr.
The following example sends "Hello World" to printer 1 and "Good Morning" to printer 2

HeAdEr01Hello World HeAdEr02 Good Morning

The printers only receive the data intended for them and never the command HeAdEr.

  • Control multiple printers
  • Control multiple RS232 devices from one serial port
  • Create a network of RS232 devices over 1.2km
  • Gather statistics
 
   
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