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I have Temperature transmitter with analog 4-20 mA connected with Paperless recorder. I have several locations having one Tx at each location. I want to access each of this location over internet. What I want to log on to internet and see live data of any particular location. These remote locations have access to GPRS/CDMA/PSTN network so any suitable modem may be used for telemetry.

I will welcome suggestion or product details to my e.mail abb1973@gmail.com

Provided that you have a modem with a serial port, perhaps a serial-based remote I/O module with 4-20mA inputs would work.

Maybe something like an ADAM module from Advantech. These units have an RS-485 interface, which could be connected to your modem via an RS-485 to RS-232 converter, and communications is via Modbus.

http://www.advantech.com/products/ADAM-4017%2b/mod_1-2MLDAT.aspx
Paul...

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Dear Paul,

I am just wondering if I can connect my ADAM analog I/O unit to GPRS modem via RS485 Modbus?

please my questions:

1) Do I need web server on GPRS modem or anywhere else

2) What brand & model do you recommend for GPRS modem. (with RS485 Modbus that can communicate with Analog IO)

Thanks - Umit

Have a look at this Weidmuller GPRS/GSM product - part of their Industrial Ethernet range - it could fit with what you are looking for.

http://catalog.weidmueller.com/procat/Group.jsp;jsessionid =7C9B8D0ACDF03CCE7FDDD5CBB6D3EA09?groupId=(%22group2532816038953%22)& page=Group

Alan Balcombe

Hi,

I think some of the eWON devices can be useful for you.

They have several models able to work as a GSM GPRS Modem, Router, Historical logging, Analog/Digital Inputs, web server, HMI, FTP server/client, Modbus Gateway, etc, etc.

It's a great solution if you are able to pay $1100-1500 depending on the eWON unit and your needs.

http://www.ewon.biz/PresEWON.htm

Best regards
Saludos y feliz día!
Gustavo A. Valero P.

Mr. ABB1973,

For this application better you go for T box,the telemetry box which supports all these connectivities. pls visit the web site:
www.cse-semaphore.com

for further detials you can contact me
regards
bcg

This product is ideal for this application:-

www.powelectrics.co.uk/metron2