The H2U 4AM is a 4-channel analog input mixed expansion unit with 2 inputs and 2 outputs, designed for use in industrial control systems.

The device has 4 input channels that can be used for either voltage (0-10V DC or 0-5V DC) or current (4-20mA DC) signals. The voltage and current inputs can be mixed, and the channels have the same input characteristics.

The device also has 2 input points and 2 output points, and occupies 16 I/O points in total. It can be used with the H2U PLC and does not require any additional conversion blocks.

The H2U 4AM is a compact and reliable expansion unit that provides accurate analog input signals for a wide range of industrial applications.