Please advice how can we send analog signal 4-20 mA for one level transmitter by existing fiber optic cable 15 km length to controlling 3 pumps that pumping to the reservoir where the level exist >

my E/mail: [email protected]

 

A media converter can change formats. For example, one might have an RJ45 Ethernet port and a fiber connector. Put one on each end for Ethernet connectivity over fiber.

A 4-20 signal is analog and fiber is digital, so you'll need some sort of A->D converters. There might be all in one devices to do this.

One option would be to put an Ethernet PLC out by the pump. It would use analog I/O locally. The Ethernet port would plug into a media converter that sends the signal back via fiber. On the other end you have another PLC/PC/Whatever plugged into Ethernet into a similar media converter.

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Nathan Boeger
"Design Simplicity Cures Engineered Complexity"
http://notanotherindustrialblog.blogger.com

 

Thank you for your reply.

I would like to verify that you mean that we need to send the 4-20 mA to media converter have RJ45 ethrenet port.

My question is how can we convert the 4-20 mA analog signal of the level transmitter to Ethernet port RJ45 for media converter?

 

You can try use those analogue to fiber converters: http://www.ad-net.com.tw/index.php?id=21

 

Looking for here.

Lucky

http://weedinstrument.com/product_groups/fiber.html

 

Ignacio - Excelent solution, have you experience with these? I like the multiplexer on page 22 of the brochure

Regards
Roy

 

Try with this site, they have quality media converters with the options of MM/SM and ST/SC connectors: http://www.commfront.com/Fiber-Optic-Converters/Ethernet-to-Fiber-Optic-Media-Converter.htm.

Steven