Scenario 1 - Replacement Device is Out-of-box and Safety Signature Exists
- Remove the old I/O device and install the new device.
- Right-click the replacement safety I/O device and choose Properties.
- Click the ellipse to the right of the safety network number to open the Safety Network Number dialog box.

- Click Set.

- Verify that the Network Status (NS) status indicator is alternating red/green on the correct device before clicking Yes on the confirmation dialog box to set the SNN and accept the replacement device.
- Follow your company-prescribed procedures to functionally test the replaced I/O device and system and to authorize the system for use.
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