Proservo NMS80/81/83
18 Endress+Hauser
L
CAUTION
Unlocking the device deactivates diagnostic functions, and the device may not be able to carry
out its safety function when unlocked.
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Therefore, independent measures must be taken to ensure that there is no risk of danger while
the device is unlocked.
To unlock, proceed as follows:
1. Check the position of the hardware write protection switch (dip switch marked "WP" on the
main electronics), and set this switch to "OFF".
2. Select the sequence Setup → Advanced setup → Deactivate SIL/WHG and enter the
corresponding unlocking code (SIL: 7452) for the Reset write protection.
The "End of sequence" message indicates that the device was successfully unlocked.
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