● Compact multiple-axis machines
●
High-performance applications with short machine cycles
● Compact machines
– Including the complete machine control in the drive
– With extensive connection possibilities for communication, HMI and I/O
● Distributed drive concepts
– Applications with many axes
– Synchronization of several SIMOTION D Control Units using distributed synchronous 
operation
Versions   
The individual versions - SIMOTION D425 (BASIC Performance), SIMOTION D435 
(STANDARD Performance) and SIMOTION D445/D445‑1 (HIGH Performance) - differ in 
terms of their PLC performance and motion control performance. The main distinguishing 
features are:
  SIMOTION D425 SIMOTION D435 SIMOTION D445/D445‑1
Maximum number of axes 16 32 64
Minimum servo/interpolator 
cycle clock
2.0 ms 1.0 ms 0.5 ms
DRIVE-CLiQ interfaces 4 4 6
 
SIMOTION 
D4x5 features PLC and motion control performance (open-loop control and motion 
control) for up to 16, 32 or 64 axes, as required. 
Due to the following functional improvements, we recommend using a SIMOTION D445‑1 
instead of a SIMOTION D445 for new applications as of V4.1 SP2: 
● An increase of around 30% in PLC and motion control performance, depending on the 
application
● Less mounting depth (mounting is possible even without spacers)
● Double-fan/battery module for higher availability
● Further information (
http://support.automation.siemens.com/WW/view/en/31507782).
The 
computing functions integrated into the drive allow the D4x5 Control Unit to operate up to 
six servo, four vector or eight 
V/f
 axes. 
Description
2.1 System overview
SIMOTION D4x5
20 Manual, 04/2014