7.5 CX32-2 controller extension
7.5.1 Overview of CX32-2
Characteristics   
The CX32‑2 (order no. 6AU1432-0AA00-0AA0) is a module in the SINAMICS S120 booksize 
format. The CX32‑2 allows scaling for the drive-end computing performance of the 
SIMOTION D4x5‑2 control units. 
Each CX32‑2 can control up to 6 additional servo, 6 vector or 12 
V
/
f
 axes. 
The controller extension has 6 DI, 4 DI/DO, and 4 DRIVE‑CLiQ interfaces.   
 
 
Note
The 
CX32 (order no. 6SL3040-0NA00-0AA0) cannot be used with the D4x5‑2. If an incorrect 
controller extension is used, a topology error will be signaled (F01360 Topology: Actual 
topology not permitted). 
 
Drive quantity structure 
Table 7-18
Drive quantity structure
Characteristic Quantity structure
Number of CX32‑2 D425-2: Max. 3 CX32-2
D435-2/D445-2/D455-2: Max. 5 CX32-2
Max. number of drives on the 
SINAMICS 
Integrated with connected 
CX32‑2 
● 6 servo or
● 6 vector or
● 12 
V
/
f
incl. an infeed (ALM, BLM, SLM)
Max. number of drives per CX32‑2 ● 6 servo or
●
6 vector or
● 12 
V
/
f
 
incl. an infeed (ALM, BLM, SLM)
Supplementary conditions Of which max. 6 drives with Safety Extended Functions 
(see also the following SIZER section for a detailed 
dimensioning)
Supplementary system components
7.5 CX32-2 controller extension
SIMOTION D4x5-2
116 Manual, 04/2014