Segment Voltage US Not Present

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The segment voltage US is not supplied to the device, even though sensor circuits 1 and 2 are active and the reset/start circuit is activated. This critical condition prevents proper internal device operation and indicates a power supply issue to the US segment. Functional safety cannot be ensured without the segment voltage US.

• Upstream cascaded module is not forwarding the segment voltage US
• External fuse supplying the segment voltage US has blown

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1. 1

   Check the segment voltage US directly to confirm its presence and correct level