[?]: intouch and read only one new tag

[PLC_ITA]

Hello friends, may be i have a stupid question

I have a plc simatic 300 ( cpu 315 whitout DP port) whith ethernet port. The supervision is Intouch 9.5 ( dassidirect driver )

My plc is I/O full ( only 3 digital input free) and is'nt possible to add a new card.

I need to add only one 4-20 mA input ( level measure ) and read this value on the supervision. No logic into PLC

Exist for example a simple card or any other device to read 4-20 mA signal and directly read this device from intouch via Ethernet or RS232 or .... ?

Anyone have a suggest for me ?


Thank you to all in advance

PLC_ITA

[Umencho]

There is possibilities to use your PC like a Profibus Master and to connect for example ET200S with AI module there...
http://support.automation.siemens.com/W ... n/29645558
Of course is not so cheap...

[xiaomian1st]

I don't know if it is too late, here I made a search http://www.wayjun.cn/ProductShow.asp?Id=253 , this is a chinese product, be able to convert 4-20ma to 485 which might help.