4-20ma to PC rs232 com port
4-20ma to PC rs232 com port
(OP)
I am looking for a way to read and manipulate some 4-20ma signals from my PC. ( Basically I am building a Engine Dyno and looking for a way to read and trend the signals from it). I presume there is a way to connect 4-20ma signals and convert them to RS232 which I can then analyse through my PC. Is anybody aware of any such device or can advise the best way to do it? Have though about bringing the signals to a PLC and then using a Scada package connected to the PC through the COM port to read the data but the cost is quite prohibitive for a DIY project. Any thoughts?





RE: 4-20ma to PC rs232 com port
http://www.bb-elec.com/product.asp?sku=232CLDR
RE: 4-20ma to PC rs232 com port
RE: 4-20ma to PC rs232 com port
If its true 4-20mA, then if the PC has a A/D I/O card, you could use that.
To use a standard RS232 port on a PC
I would take the approach of using an A/D converter to generate 4-20 decimal values, then using a Processor to embed this into a suitable protocol, and transmit that.
SCADA devices usually conform to a protocol.
Bert
RE: 4-20ma to PC rs232 com port
Here's something more applicable:
http://www.bb-elec.com/product.asp?sku=232SPDACL
Is there some particular reason for using RS-232? RS-232 ports may not be as available on newer computers. USB or Ethernet might be better for something new.
RE: 4-20ma to PC rs232 com port
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RE: 4-20ma to PC rs232 com port