The Siemens SINAMICS S120 CU310 DP (6SL3040-0LA00-0AA1) is a compact, high-performance control unit designed for the SINAMICS S120 drive system. It serves as the core for coordinating single-axis drive applications (e.g., conveyors, pumps, or basic motion tasks), integrating drive control, I/O processing, and communication via a PROFIBUS DP interface (for seamless integration into PLC-based automation networks).
Figure 1 shows the front panel of 6SL3040-0LA00-0AA1.


Table 1 shows the Quick Specs.
| Item | Specification |
|---|---|
| Manufacturer | Siemens |
| Product Type | CU310 DP Control Unit |
| Operating Voltage | 24 V DC |
| Digital I/O | 4 floating inputs; 4 bidirectional I/O |
| Encoder Support | TTL/HTL incremental encoders |
| Weight | ~0.95 kg |
| Category | Details |
|---|---|
| Power Supply | - Voltage: 24 V DC
|
| Digital Inputs | - Voltage Range: -3 to +30 V
|
| Digital Outputs | - Voltage: 24 V DC
|
| Encoder Interface | - Cable Length: 100 m (unipolar) / 300 m (bipolar, HTL)
|
| Physical | - Dimensions: 73 mm (W) × 183.2 mm (H) × 89.6 mm (D)
|
| Certifications | CE, cULus |

