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Description
Application Scenarios
In a high-speed automotive stamping press line, the synchronous operation of multiple servo axes for material feeding and press transfer demanded a robust power infrastructure. The plant’s grid experienced frequent voltage sags due to large motor starts elsewhere, causing nuisance undervoltage trips that halted production and created scrap. The 200_BTV20_3AA-28B-33C-D-FW power supply module, with its wide input voltage tolerance (+10%/-15%) and high-capacity DC link capacitors, buffered these disturbances and prevented system shutdowns. This reliability is mission-critical in heavy industrial environments where unplanned downtime directly impacts throughput. The complete model string—3AA-28B-33C-D-FW—encodes specific configuration details: the FW suffix indicates the pre-installed firmware version, which must be verified when sourcing replacements.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 200_BTV20_3AA-28B-33C-D-FW (also written BTV20.3AA-28B-33C-D-FW) |
| Manufacturer | Bosch Rexroth (formerly Indramat / Mannesmann Rexroth) |
| Product Category | Servo System Power Supply / Rectifier / Filter Module |
| System Platform | Indramat BTV20 / SYSTEM200 Multi-Axis Drive System |
| Input Voltage | 3×400 V AC (+10% / -15%), 45-66 Hz |
| Output (DC Bus) | 200 V DC |
| Rated Output Power | 20 kW |
| Rated Output Current | 100 A (at 200V DC) |
| Cooling Method | Forced Air Cooling (Internal Fan) |
| Protection Features | Overvoltage, Undervoltage, Overcurrent, Short Circuit, Overtemperature |
| Status Indication | LED Indicators (Run, Fault, Ready) |
| Operating Temperature | 0°C to +45°C (Recommended for full performance) |
| Storage Temperature | -25°C to +70°C |
| Installation | BTV20 System Backplane Mount |
| Protection Rating | IP20 (Must be installed inside a protective enclosure) |
| Weight | Approx. 12–20 kg (depending on configuration) |
| Lifecycle Status | Legacy / Discontinued – Available as New Surplus or Refurbished |
Technical Principles and Innovative Values
- Innovation Point 1: Integrated High-Power DC Link for Multi-Axis Stability. The 200_BTV20_3AA-28B-33C-D-FW delivers 20kW of continuous power in a compact, book-style form factor that mounts directly onto the BTV20 backplane. Unlike standalone power supplies, it integrates the DC link capacitor bank internally, providing the energy storage needed to handle peak current demands when multiple servo axes accelerate simultaneously. This design prevents “DC link undervoltage” faults during high-dynamic motion sequences, ensuring stable machine operation.
- Innovation Point 2: Wide Input Tolerance and Robust Grid Conditioning. A key differentiator for this module is its tolerance to unstable plant power—accepting 3×400V AC with +10%/-15% variation. It incorporates advanced input filtering and a controlled pre-charge circuit that protects sensitive internal components from inrush currents and grid-borne transients. In environments with fluctuating power quality, this robust front-end design significantly reduces drive failures.
- Innovation Point 3: Intelligent System Integration via BTV20 Backplane. The module does not operate in isolation; it communicates its status (Ready, Fault, Overload) directly to the system’s master motion controller via the BTV20 backplane. This integrated diagnostic capability enables the entire control system to respond intelligently to power anomalies, triggering coordinated shutdowns or Safe Torque Off (STO) sequences to protect both machinery and work-in-progress.
