Analog input module manages  8 signals that, according to hardware selection, can be voltage or current.  Via software it is possible to configure inputs for voltage 0-10V, ±10V, 0-5V, ±5V or for current 0-20mA, 4-20mA. Signal is converted in a 12 bit word. All eight channels are always available for software direct reading, without the need to start a conversion procedure. Conversion time for each channel is 6 ms.

Datasheet (pdf 214kb)