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Kollmorgen BDS4A-230J-000
Model Number: BDS4A-230J-000
Product Overview:
The BDS4A-230J-000 is a dynamic braking resistor module from Kollmorgen’s BDS (Brake Dynamic Stop) series. It is designed to dissipate regenerative energy from servo drives during deceleration. The “230J” indicates a 230V AC rated version with a specific resistance/power rating. The “4A” denotes the series/frame.
Detailed content
Product Category: Dynamic Braking Resistor / Regeneration Module
Model Series: BDS4A
Technical Specifications:
| Parameter | Value |
|---|---|
| Model | BDS4A-230J-000 |
| Type | Dynamic Braking Resistor Module (External) |
| Rated Voltage | 230 V AC (3-phase input) |
| Resistance Value | 20 Ω (±5%) |
| Rated Power | 1.5 kW (continuous) |
| Peak Power (10 sec) | 3.0 kW |
| Braking Torque Contribution | Up to 100% of motor rated torque (at 3000 RPM) |
| Connection | 3-phase input from drive brake output, resistor internally connected |
| Cooling | Forced air (integral fan) |
| Dimensions (W × H × D) | 150 mm × 200 mm × 120 mm |
| Weight | 4.5 kg |
| Operating Temperature | 0°C to +50°C |
| Protection Rating | IP20 (IP54 with enclosure) |
| Certifications | CE, UL, cUL, RoHS |
Functional Features:
- Dissipates regenerative energy as heat during motor deceleration
- Prevents DC bus overvoltage during rapid stops or overhauling loads
- Integral fan for forced-air cooling
- 3-phase input — connects directly to AKD/S-series drive brake terminals
- No external wiring to resistor element — pre-wired internally
Performance Parameters:
- Maximum braking current: 15 A RMS (3-phase)
- Thermal time constant: 120 seconds (to 90% of steady state)
- Resistance tolerance: ±5% at 20°C
- Insulation resistance: > 100 MΩ at 500 V DC
Material Composition:
- Resistor Element: Nichrome wire wound on ceramic tube (Kanthal or equivalent)
- Housing: Powder-coated steel (RAL 7035, light gray)
- Fan: Axial fan, 24 V DC, ball bearing, 30,000 hour life
- Terminals: Screw terminals, 6 mm² wire capacity
- Internal Wiring: Silicone-insulated wire, 200°C rated
Structural Features:
- Rectangular metal enclosure with ventilation grilles on top and sides
- 3-phase input terminals on top (L1, L2, L3 from drive)
- Integral fan on rear panel
- Mounting: DIN rail (35mm) or wall mount with brackets
- LED indicator: Power on (green), Overtemperature (red)
Working Principle:
When the servo drive commands deceleration and the motor acts as a generator, energy flows back to the DC bus. If this energy exceeds what the drive can absorb, the DC bus voltage rises. The drive activates the brake chopper circuit, switching the excess energy to the BDS4A resistor module via the 3-phase brake terminals. The resistor converts this electrical energy into heat, which is dissipated by the integral fan.
Advantages & Highlights:
- Protects drive from DC bus overvoltage fault
- Enables faster deceleration times
- No external resistor wiring — plug-and-play connection
- Compact, DIN-rail mountable design
Applicable Industries:
- Any AKD or S-series servo drive application with frequent deceleration
- Overhauling loads (cranes, hoists, elevators)
- High-inertia applications (flywheels, large spindles)
- Applications with rapid cycle times
Installation Requirements:
- Connect 3-phase brake output from drive to BDS4A input terminals (L1, L2, L3)
- Mount with minimum 100mm clearance above for airflow
- Ensure ambient temperature does not exceed 50°C
- Connect to protective earth (PE)
Usage Notes:
- Do not block ventilation grilles — overheating will trigger thermal shutdown
- For duty cycles > 50% braking, consider a larger BDS module or regenerative unit (AKD-P with regeneration option)
- Verify brake resistor value matches drive settings in Workbench
- Replace fan if noise increases or airflow decreases
