General Purpose Digital I/O

This section describes the general purpose 24V I/O (Gray terminals) and the configurable I/O (Yellow terminals with black text) when not configured as safety I/O.

The general purpose I/O can be used to drive equipment like pneumatic relays directly or for communication with other PLC systems. All Digital Outputs can be disabled automatically when program execution is stopped.

In this mode, the output is always low when a program is not running. Examples are shown in the following subsections.

These examples use regular Digital Outputs but any configurable outputs could also have be used if they are not configured to perform a safety function.

In this example a load is controlled from a Digital Outputs when connected.	In this example a simple button is connected to a Digital Input.

You can use the digital I/O to communicate with other equipment if a common GND (0V) is established and if the machine uses PNP technology, see below.