Rockwell Automation Publication 5094-UM001C-EN-P - April 2019 41
Digital I/O Module Operation in a Logix 5000 Control System Chapter 1
Safe State
The following are the safe states of the safety modules:
•Safety outputs: OFF
• Safety input data to network: OFF
Figure 6 - Safety Status
The modules are designed for use in applications where the safe state is the
off state.
ATTENTION:
• The safe state of the outputs is defined as the off state.
• The safe state of the module and its data is defined as the off state.
• Use the FLEX 5000 I/O safety modules only in applications where the off
state is the safe state.
IMPORTANT If you inhibit a safety module from transitioning to a safe state when a fault
occurs because an I/O connection is lost, you accept responsibility for any
consequences that result from your decision to inhibit.
We recommend that you use other means to maintain the safe state if you
inhibit the safety module from transitioning to a safe state.
Output OFF
Networks Input to Networks OFF
Safety Status
Input
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