SINAMICS G120 Control Unit CU240E-2 USS/Modbus STO Safety – Siemens

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Product Specifications

Brand: Siemens
Part Number: 6SL3244-0BB12-1BA1
Series: SINAMICS G120
Type: Control Unit
Supply Voltage: 24 V DC
Communication: RS485, USS/Modbus RTU
Power Loss: 5.5 W
Net Weight: 0.49 kg

Product Description

The 6SL3244-0BB12-1BA1 is the CU240E-2 USS/Modbus RTU variant of the modular SINAMICS G120 drive family. It packs standard drive control, integrated STO safety, and flexible I/O into a compact 73mm-wide housing that snaps directly onto a compatible PM240 or PM240-2 Power Module.

Drive Control & Performance

Supports V/f linear, V/f square-law, V/f FCC (flux current control), and encoderless vector control with torque control.
Max. pulse frequency: 4 kHz (adjustable).
Automatic motor data identification for quick commissioning.

Integrated Safety

Safe Torque Off (STO) as standard, compliant with EN 61800-5-2.
Extended safety functions (SS1, SLS, SDI, SSM) available via license.

Connectivity & I/O

Built-in RS485 port with USS and Modbus RTU protocols for direct PLC or HMI connection.
6 digital inputs (including 1 fail-safe), 3 digital outputs, 2 analog inputs, 2 analog outputs.
PTC/KTY interface, USB port and SD/MMC card slot for parameter cloning.

Technical Specifications

Parameter	Value
Supply Voltage	24 V DC (via Power Module) / External 20…29 V DC
Max. Current Consumption	0.50 A
Power Loss	5.5 W
Dimensions (W × H × D)	73.0 × 199.0 × 46.0 mm
Net Weight	0.49 kg
Ambient Temperature	-10 … 55 °C (operation), -40 … 70 °C (storage)
Degree of Protection	IP20 / UL open type
Compliant Standards	CE, UL, cUL, RCM, SEMI F47
RoHS	Yes
Country of Origin	United Kingdom