Digital guide
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B&R 3PS465.9
The unit incorporates active PFC (Power Factor Correction) achieving power factor > 0.95 at full load. Built-in protections include: short-circuit protection (auto-recovery), overcurrent protection, overvoltage protection, overtemperature protection (thermal shutdown at 85°C internal). A DC OK relay contact (changeover, 250 V AC / 5 A) provides status signaling to the host controller. The wide input voltage range (323–528 V AC) ensures uninterrupted operation during grid voltage sags and swells.
Detailed content
Core Technical Specifications:
| Parameter | Value |
|---|---|
| Input Voltage (Nominal) | 3 × 380 V AC to 480 V AC |
| Input Voltage Range | 323 V AC to 528 V AC (±15%) |
| Input Frequency | 50 Hz / 60 Hz (auto-sensing) |
| Output Voltage (Nominal) | 48 V DC |
| Output Voltage Adjustable Range | 44 V DC to 52 V DC (±10%) |
| Rated Output Current | 9 A (continuous) |
| Rated Output Power | 432 W |
| Peak Output Power (10 s) | ~520 W |
| Output Ripple (Peak-to-Peak) | < 200 mV |
| Efficiency (at Full Load) | > 90% |
| Hold-Up Time (at Full Load) | > 20 ms |
| Standby Power Consumption | < 1.5 W |
| Protection Rating | IP20 (IEC 60529) |
| Insulation Class | Class I (protective earth required) |
| Mounting Standard | DIN 35 mm rail per EN 60715 (TH35) |
| Dimensions (W × H × D) | 70 mm × 125 mm × 100 mm |
| Net Weight | ~1.2 kg |
| Ambient Operating Temperature | -10°C to +55°C |
| Storage Temperature | -25°C to +70°C |
| Certifications | CE, UL 508, cULus, ATEX (varies by region) |
Working Principle:
Three-phase AC input is first rectified via a 6-pulse diode bridge, then filtered by a bulk capacitor bank. A high-frequency MOSFET inverter stage (switching frequency: ~80 kHz) converts DC to high-frequency AC, which is stepped down via a high-frequency transformer and rectified again to produce regulated 48 V DC output. A digital feedback controller (PWM) continuously adjusts duty cycle to maintain constant output voltage under all load conditions.
Applicable Industries:
Machine tool control cabinets, ACOPOS servo drive power feeding, conveyor system control panels, packaging machine power distribution, material handling equipment, any automation system requiring 48 V DC bus voltage.
Installation Requirements:
Mount on DIN 35 mm rail (TH35). Leave minimum 10 mm clearance above and below the unit for convective cooling. Connect protective earth (PE) terminal to chassis ground. Use minimum 2.5 mm² copper cable for DC output connections. Install a 10 A slow-blow (gG) fuse on each input phase. Do not block ventilation slots.
Critical Usage Directives:
Do not connect output to capacitive loads exceeding 1000 µF without series resistance. Verify input voltage matches nameplate before energizing. Do not operate without a load for more than 30 seconds — minimum load of 10% rated current (0.9 A) is required for regulation stability. Ensure ambient temperature does not exceed 55°C without derating output current by 1.5% per °C above 40°C.
