Safety Relay User Manual Owner's manual

Rockwell Automation Publication 440C-UM001C-EN-P - November 2014 79

Logic Levels A and B Chapter 10

Figure 97 - AND with Restart Timing Diagram

OR with Restart

The OR with Restart accepts 2…24 inputs and requires a Restart input. At least

one input must be HI when the Restart button is pressed.

The CCW automatically recognizes the Restart function blocks and allows you

to select one. Once selected, the Restart is no longer available for other logic

blocks.

Figure 98

shows an example with a gate switch and a light curtain. Either the gate

must be closed or the light curtain clear. Then, the Restart input must be pressed.

The output of the logic block goes HI on the trailing edge of the restart signal.

Figure 98 - Example OR with Restart

Input 1

Restart

Input 2

Output

AND