Siemens 6SN1145-1BA02-0CA1 Power Supply and Control Module
The Siemens 6SN1145-1BA02-0CA1 is a combined power supply and control interface module belonging to the Simodrive 611 series. It provides regulated DC bus voltage and control signals for digital drives and serves as a programmable logic controller interface in modular motion systems.
Electrical Specifications
Input: 3-phase AC 380–480 V (50/60 Hz). Output DC bus voltage: 560–650 VDC (depending on input), with continuous current rating of 15 A and peak current of 30 A for 3 seconds. The unit includes an integrated braking chopper for regenerative energy dissipation (external resistor required). Efficiency is 97% at nominal load. Internal power supply for control electronics: 24 VDC (SELV), 2 A output from a separate auxiliary input (24 VDC external).
Control and Communication
The module hosts a proprietary interface (Simodrive 611 bus) that connects to up to 6 axes of power modules (e.g., 6SN1123). A built-in PROFIBUS DP (9‑pin D‑sub) allows configuration and cyclic data exchange with a higher‑level PLC (S7‑300/400). The 6SN1145-1BA02-0CA1 also provides two analog inputs (±10 V, 12‑bit) for external speed or torque reference, and four digital inputs (24 VDC) for enable, reset, and error acknowledge.
Protection and Monitoring
Features include: overcurrent protection (software limit and hardware trip), overvoltage cutoff, undervoltage lockout, and overtemperature shut down. LEDs indicate DC bus ready, fault, and PROFIBUS status. A relay output (30 VDC/1 A) signals “drive ready” state. The module performs automatic phase‑loss detection and short‑circuit test on the braking resistor connection. All fault events are stored in a non‑volatile log (last 8 events).
Integration with PLC Functionality
Although primarily a drive supply unit, the 6SN1145-1BA02-0CA1 includes a basic PLC function for local logic: it can execute simple sequences (e.g., startup ramp, emergency stop handling) without external CPU. This is programmed via Siemens SIMOTION SCOUT software using a subset of IEC 61131‑3 languages. The module has 8 KB of retentive memory and 16 digital virtual flags. For complex tasks, it works as a PROFIBUS slave to a master PLC, passing drive parameters and status through DPV1 messaging.
Mechanical and Environmental
Dimensions: 300 mm (H) × 75 mm (W) × 210 mm (D). Weight 3.2 kg. Mounting in a ventilated cabinet (IP20 rated). Ambient temperature: 0°C to 40°C (derate 2% per °C to 55°C). Cooling: forced air (integral fan, 45 m³/h). Noise emission < 70 dB(A). Storage temperature: −25°C to +70°C. Humidity 5–95% non‑condensing. The module meets EN 61800‑3 (EMC), EN 60204‑1 (machine safety), and UL 508C for the US market.
Applications and Maintenance
Typical use in machine tools, printing presses, and handling systems where up to 6 synchronized servo axes are required. The 6SN1145-1BA02-0CA1 provides the regulated DC link for motors and supplies the control voltage to all connected drive modules. Periodic inspection of the fan filter (every 6 months) and cleaning of the heatsink are recommended. The internal DC link capacitors have a lifespan of 10 years under nominal operation; replacement of the module is advised after that period.
Commissioning Notes
Configuration requires STARTER or SIMOTION SCOUT software. The module's PROFIBUS address is set via two rotary switches (0–99). Initial startup includes DC bus charging time of approximately 3 seconds; the green “ready” LED flashes during precharge. Braking resistor minimum resistance: 10 Ω, maximum power: 300 W continuous. For safety, the 24 V auxiliary supply must be present before main AC input to avoid uncontrolled braking.
