Siemens sinumerik 840D sl Function Manual page 552

Boundary conditions
3.1 I/O modules
For A/D conversion, the analog output current of the clearance sensor must be connected to
NC via an I/O module with analog input to the NC.
3.1.1 I/O modules (840D)
The analog I/O module (DMP compact module) is connected to the drive bus via an NCU
terminal block.
Figure 3-1
Suitable I/O modules
As the A/D conversion time directly affects the deadtime of the clearance control servo loop,
only one I/O module may be used with low conversion time.
An I/O module suitable for clearance control is:
• DMP compact module 1I, NC analog
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
Clearance sensor connection via analog DMP module
Conversion time: 75 μs
Order number (MLFB): 6FC5 211-0AA10-0AA0
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