All Modicon M258 controllers have two groups of high-speed Inputs/Outputs with, for each group:

Four sink type high-speed inputs(up to 200 KHz),2 standard inputs and 2 source type high-speed outputs (up to 100 KHz) dedicated
to HSC( High Speed Counter) or PWM (Pulse Width Modulation) functions.

A high-speed input which can be used as an “Encoder capture input”

Two commons for the inputs.

One common for the outputs.

A power supply (24VDC) consisting of 3 units:

One for the CPU (Control Processing Unit).

One for the high-speed Input/Output modules.

One for other modules (Internal Input/Output Bus).