Opto 22 IDC5B is part of their digital I/O (Input/Output) module family. It is a 5-channel, rack- or DIN-rail-mountable digital input and output module for industrial and commercial automation, machine control, monitoring, and data acquisition systems. It has 6 inputs and 5 outputs, each of which can be individually configured as logic-level inputs, relay-type output circuits, or voltage-sensing inputs. The inputs can detect a wide range of user-configurable voltage levels, from 3.3V to 24V DC, and the IDC5B includes various software tools for industrial control, data logging, and diagnostics.