SINAMICS G120
Standard inverters 0.37 kW to 250 kW (0.5 hp to 400 hp)
CU240 Control Units
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Siemens D 11.1 · 2009
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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 the closed-loop control, it has additional
functions that can be adapted to the particular application
through parameterization. Several Control Units are available in
different versions:
•CU240E
•CU240S
•CU240SDP
•CU240SDP-F
•CU240SPN
• 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”, 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 when a speed limit is exceeded
• Safe Brake Control (SBC) for controlling motor brakes that 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 having to use a motor sensor or
encoder; the implementation cost is minimal. Existing systems in
particular can be simply 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 not certified for pull-through loads as in the case of lifting
gear and winders.
Safety functions have been extended with firmware V3.2.
Additional information is provided in the part Highlights, section
Safety Integrated.
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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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