Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual - Manual (Page 75)

Rockwell Automation Publication 440C-UM001C-EN-P - November 2014 75
Chapter
10
Logic Levels A and B
The Connected Components Workbench (CCW) has two levels that allow you
to apply simple logic to create more sophisticated safety systems. The logic levels
are labeled A and B on the CCW workspace. The logic functions are available in
the Toolbox.
Figure 88 - Logic Levels A and B on the CCW Workspace
Pass Through When a logic level is not used, the CCW automatically creates a Pass Through
block.
AND The AND block accepts 2…24 inputs. When all inputs are HI, the output of the
block is HI. If any of the inputs is LO, the output of the block is LO.
The AND block is often used when multiple E-stops must be released and
multiple safety gates must be closed for the safety system to be energized.
Figure 89 - AND Logic Block