Can you link me to a device that does 4-20mA to Modbus TCP?

Thanks.

 

Just a quick web search revealed this one:

Advantech ADAM-6017

I downloaded the datasheet and they have 0-20mA and 4-20mA input modes as well as voltage input modes.

You can also check Moxa, I recall they have some small IO modules for ModbusTCP.

If your devices are all in one spot (i.e. wired back to a central electrical panel e.g.) you can use a slice IO setup with a Modbus TCP bus coupler. Wago, Beckhoff, Moxa, and B&R have slice IO modules that let you mix and match IO in 4/6/8/12 channel chunks usually. This makes for a very expandable and flexible system.

If all you want is a remote drop somewhere on the plant floor for a handful of IO the ADAM (or something similar) is probably your first choice.

KEJR

 

Wago 750 I/O has a bus coupler
http://www.wagocatalog.com/okv3/index.asp?lid=5&cid=51&strBestNrID=7500841
and an analog input card
http://www.wagocatalog.com/okv3/index.asp?lid=5&cid=51&strBestNrID=7500841

Modicon Momentum series has analog input blocks
http://www.schneider-electric.us/pr...process-infrastructure-and-oems/momentum-plc/

Acromag BusWorks 900EN Series has analog input blocks
http://www.acromag.com/catalog/97

AutomationDirect.com Terminator I/O has a bus coupler
http://www.automationdirect.com/adc...or_I-z-O_Network_Interface_Modules/T1H-EBC100
and an analog input card
http://www.automationdirect.com/adc...-O/Terminator_I-z-O_Analog_Modules/T1F-08AD-1

Beckhoff has a bus coupler
http://www.beckhoff.com/english.asp?bus_terminal/bk9000_bk9050.htm?id=201537726286
and so many analog cards it makes my head hurt
http://www.beckhoff.com/english.asp?bus_terminal/analog.htm?id=365410967

B&R Automation X20 I/O has a bus coupler
http://www.br-automation.com/cps/rde/xchg/br-productcatalogue/hs.xsl/products_87188_ENG_HTML.htm
and numerous analog input cards
http://www.br-automation.com/cps/rde/xchg/br-productcatalogue/hs.xsl/products_110093_ENG_HTML.htm

I'm sure there are many more.

-James Ingraham
Sage Automation, Inc.

 

Try the Advantech 6000 series, Acromag, or really just about any industrial I/O manufacturer. Modbus/TCP is very widely supported. It's mainly a matter of picking out the size, packaging, cost, etc. that you need. Some are individual modules, while others are racks.

The modbus.org web site has a list of vendors, but there are also lots of companies that aren't members who also sell good hardware.

 

The ADAM-6017 is a modbus RTU device. To be able to read data at address 30000 via Modbus TCP, use ET-7017. Here's a link:

http://www.icpdas-usa.com/et_7017.html

 

In reply to Automationtechie:

I've not used the ADAM-6017, but it does say on the advantech web page that it supports ethernet communications and Modbus/TCP (as well as http for monitoring and setup).

KEJR

 

The Advantech 4000 series are Modbus/RTU over RS-485, while the 6000 series are Modbus/TCP over Ethernet. Both also support Advantech's own ASCII UDP protocol, which is documented in their manuals.

 

I think they can help you
http://www.a2s.pl/en/
i once bought modbus for my boss from them but i don't remember if it was 4-20mA to ModBus TCP just check their offer or call them, they'll help for sure