Description
2
2.1 Safety notes
Note safety information
Note the following safety information when working with the control unit and its components.
Caution
An option board may only be inserted and removed when the control unit and option board
are disconnected from the power supply.
Notice
The 80 mm clearances above and below the components must be observed. The unit
protects itself from overheating by shutting down.
Caution
The Compact Flash card may only be inserted or removed when the control unit is
disconnected from the power supply.
D4xx
Manual, 12.2004, 6AU1900-1AJ32-0BA0
2-1
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