PN:U550013B / U550013C nihon kohden bsm2301 power board

1. Basic Input Parameters

• AC Input Voltage: 100–240 VAC ±10%, auto-switching
• AC Input Frequency: 50/60 Hz ±2%
• Input Current: Max 1.0 A @ 100 VAC
• Power Consumption: AC mode: 70 VA max; Battery mode: 40 W max
• Fuse: Built-in 2 A / 250 VAC slow-blow fuse (AC inlet)
• Battery Input: 10.8–15.0 VDC (rechargeable Ni-MH battery pack, 10HR-4/3FAUC-NK)

2. DC Output Parameters (Main Power Board)

3. Physical & Environmental Specifications

• Board Dimensions: Approx. 150 × 100 × 35 mm (L×W×H)
• Weight: Approx. 0.45 kg
• Operating Temperature: 0 °C to +40 °C
• Storage Temperature: -20 °C to +60 °C
• Relative Humidity: 30%–85% RH (non-condensing)
• Altitude: Operating: -500 m to 3,000 m; Storage: -500 m to 13,100 m

4. Protection & Safety Features

• Over-Voltage Protection (OVP): Triggers at >16.5 V (+15 V), >5.5 V (+5 V)
• Over-Current Protection (OCP): Auto-shutdown on over-current for all outputs
• Short-Circuit Protection (SCP): Foldback current limiting, auto-recovery
• Isolation Voltage: 4,000 VAC (input to output, medical grade)
• Leakage Current: <100 µA (patient leakage, meets IEC 60601-1)
• EMC Compliance: IEC 60601-1-2, EN 55011 Class B (emission)

5. Control & Interface

• Power Control: Integrated power management MCU, AC/battery auto-switching
• Battery Charging: Normal charge: 370 mA (16 hrs max); Trickle charge: 370 mA (1.2s / 1min interval)
• Connectors:
  • CN401: Main output to MAIN board (+15V, +5V, GND, control signals)
  • AC Inlet: IEC C6 socket with fuse & ground terminal
  • Battery Connector: CN1401 (10.8–15 VDC input)
   

6. Compliance Standards

• Safety: IEC 60601-1:2005, IEC 60601-2-49 (medical electrical safety)
• EMC: IEC 60601-1-2:2007, EN 60601-1-2
• Performance: Nihon Kohden internal medical PSU specifications

Key Notes

• This PSU is shared with BSM-2303/2304/2351 series (same core output specs).
• +3.3 V is generated by on-board DC-DC converter from primary +15 V output.