SINAMICS G120
Inverter chassis units 0.37 kW to 132 kW (0.5 hp to 200 hp)
CU240 Control Units
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Siemens D 11.1 · 2008
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Overview
Example of CU240S DP-F Control Unit
The Control Unit performs closed-loop control functions for the
inverter. In addition to control functions, the Control Unit can also
perform other tasks which can be adapted to the relevant appli-
cation by parameterization. A number of Control Units are avail-
able in different versions:
• CU240E
• CU240S
• CU240S DP
• CU240S DP-F
• CU240S PN
• CU240S PN-F
Safety Integrated functions
The following Safety Integrated functions are integrated in the
CU240S DP-F and CU240S PN-F Control Units and, with the ex-
ception of the Safe Brake Control (SBC), can be implemented
without external circuit elements:
The SINAMICS G120 fail-safe frequency inverter provides four
safety functions, certified in accordance with EN 954-1 Category
3 and IEC 61508 SIL 2:
• Safe Torque Off (STO) to protect against active movement of
the drive
• Safe Stop 1 (SS1) for continuous monitoring of a safe braking
ramp
• Safely Limited Speed (SLS) for protection against dangerous
movements on exceeding a speed limit
• Safe Brake Control (SBC) for driving motor brakes which are
active in the de-energized state, e.g. motor holding brakes
The functions “Safe Stop 1” and “Safely Limited Speed” can
both be implemented without a motor sensor or encoder; the im-
plementation cost is minimal. Existing plants in particular can be
updated with safety technology without the need to change the
motor or mechanical system.
The safety functions “Safely Limited Speed” and “Safe Stop 1”
are certified for asynchronous motors without encoders – these
safety functions are not permitted for pull-through loads as in the
case of lifting gear and winders.
For further information, please refer to section Safety Integrated
in chapter Innovations.
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Selection and Ordering Data
Communication Digital
inputs
Standard
Digital
inputs
Fail-safe
Digital
outputs
Encoder
interfaces
Designation Control Unit
Order No.
Standard
RS485/USS 6 – 3 – CU240E 6SL3244-0BA10-0BA0
RS485/USS 9 – 3 1 CU240S
6SL3244-0BA20-1BA0
PROFIBUS DP 9 – 3 1 CU240S DP
6SL3244-0BA20-1PA0
PROFINET 9 – 3 1 CU240S PN
6SL3244-0BA20-1FA0
Fail-safe for Safety Integrated
PROFIBUS DP 6 2 3 1 CU240S DP-F 6SL3244-0BA21-1PA0
PROFINET 6 2 3 1 CU240S PN-F
6SL3244-0BA21-1FA0
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