We want a microcontroller card that can store data for 48 hours(sampling rate every 5secs).Data input to this card will be from sensors(4-20mA).System must contain minimum 12 input ports(8 analog and 4 digital).System should have RTC ,two serial ports(for downloading data and display purpose)and 4 d/o.
Please do suggest me a readymade solution for the above purpose.

With Warm Regards
Ambrish