Siemens SINAMICS G120 - Control Units

Design of the frequency converter
2.2 Control Units
Converter with Control Units CU230P-2; CU240B-2; CU240E-2
16 Getting Started, 11/2013, A5E32885834B AA
2.2
Control Units
Different Control Unit versions
The Control Units differ by the following main factors:
● Fieldbus interface type
● Type and scope of the functions
– e.g. for CU230P-2… through additional specific technology functions for pumps, fans
and compressors
– e.g. for CU240E-2… through additional integrated safety functions
● Type and number of available inputs and outputs
CU230P-2…
Functions
CU230P-2 HVAC CU230P-2 CAN CU230P-2 DP CU230P-2 PN
Fieldbus
USS / Modbus RTU / Bacnet MS/TP / P1
CANopen
PROFIBUS DP
PROFINET
Technology
functions
For instance: Energy-saving mode, cascade control, extended emergency operation, multi-zone
controller, bypass
Digital inputs
6
Analog inputs
AI0 and AI1
: Voltage or current;
AI2:
Current or temperature sensor (LG-Ni1000/PT1000);
AI3: Temperature sensor (Ni1000/PT1000);
Digital outputs
DO 1 NO contact, DO0 and DO2 change-over contact to activate larger loads, AC and DC
Analog outputs
2
CU240B-2…
Functions
CU240B-2 CU240B-2 DP
Fieldbus
USS or Modbus RTU
PROFIBUS DP
Digital inputs
4
Analog inputs
1
Digital outputs
1
Analog outputs 1
CU240E-2…
Functions
CU240E-2 CU240E-2 F CU240E-2 DP CU240E-2 DP-F CU240E-2 PN CU240E-2 PN-F
Fieldbus USS or
Modbus RTU
USS or
Modbus RTU
PROFIBUS DP PROFIBUS DP
with PROFIsafe
PROFINET PROFINET with
PROFIsafe
Integrated safety
functions
STO STO, SS1,
SLS
STO STO, SS1, SLS STO STO, SS1, SLS
Digital inputs
6
Fail-safe digital
inputs*
1 3 1 3 1 3
Analog inputs
2
Digital outputs
3
Analog outputs
2
*) A fail-safe digital input is created by combining two "standard" digital inputs