PM651 – 650W Open Frame Medical Power Supply
- Technology
- Open / u-frame power supplies
- Partner
- FSP Protek
The PM651 is a single-output AC-DC power supply series designed for medical equipment requiring continuous output power of up to 650W. Its BF class insulation and 4000 VAC input-to-output withstand rating support integration into equipment with demanding insulation requirements. The series accepts a 90–264 VAC input and provides active power factor correction for operation across international mains supplies. Output variants cover nominal voltages from 12V to 58V, allowing engineers to select a model that matches the system load. The U-bracket version delivers its rated output with 30 CFM forced-air cooling, while an enclosed version with a cover and fan assembly is also available. Remote sensing, power-fail detection, output inhibit and a 5V standby supply support integration with system-level monitoring and control functions. In addition to medical equipment, the applicable safety approvals allow the series to be considered for information technology, telecommunications and audio-visual equipment.
The PM651 series is built for medical and other professional systems that need high continuous power from a compact AC-DC platform. It combines 600–650W output capability, BF class insulation, active PFC and broad 90–264 VAC input operation to support global equipment designs.
Available nominal outputs span 12V to 58V, and designers can choose either an open-frame U-bracket version that uses system airflow or an enclosed configuration with integrated fan assembly. Additional functions including remote sense, power-fail detection, output inhibit, 5V standby and 12V fan supply help simplify system integration and monitoring.
Range features
A high level overview of what this range offers
- 600–650W continuous output – Supports higher-power medical and electronic equipment when the specified cooling conditions are provided.
- BF class insulation – Supports power architectures intended for medical equipment with applied-part insulation requirements.
- 4000 VAC input-to-output withstand voltage – Provides 2 MOPP insulation between the AC input and DC output.
- 90–264 VAC input with active PFC – Accommodates a broad range of international AC mains supplies.
- 12V to 58V single-output models – Provides multiple voltage and current combinations for different system loads.
- U-bracket and enclosed configurations – Allows selection between system-provided cooling and a cover-and-fan assembly.
- Operation at altitudes up to 5000 metres – Supports equipment intended for use at elevated locations.
- Remote sense compensation up to 0.5V – Helps offset voltage losses in the output cabling.
- 5V standby and 12V fan supplies – Supports auxiliary control circuits and cooling hardware.
- PFD and inhibit signals – Allow the host equipment to monitor input power status and disable the main output.
- Overvoltage, short-circuit and overtemperature protection – Helps protect the power supply and connected load during defined fault conditions.
- Class B conducted and radiated emissions performance – Supports EMC planning for medical and information technology equipment.
- RoHS compliance – Supports restricted-substance requirements for electronic equipment.
Downloads
for PM651 - 650W Open Frame Medical Power Supply
What’s in this range?
All the variants in the range and a comparison of what they offer
| Specification | Value |
|---|---|
Power supply type | Single-output AC-DC switching power supply |
Maximum continuous output | 600W or 650W, depending on model |
Input voltage | 90–264 VAC |
Input frequency | 47–63Hz |
Power factor correction | Active PFC |
Nominal output voltage range | 12–58V DC, depending on model |
Output voltage tolerance | ±2% |
General ripple and noise limit | 1% peak-to-peak maximum |
Remote sense compensation | Cable losses up to 0.5V |
Standby output | 5V DC at 200mA maximum |
Fan output | 12V DC at 500mA maximum |
Typical efficiency | 90% |
Hold-up time | 20ms minimum at 110 VAC and 650W |
Input-to-output withstand voltage | 4000 VAC, 2 MOPP |
Input-to-earth withstand voltage | 1500 VAC, 1 MOPP |
Output-to-earth withstand voltage | 1500 VAC |
Operating temperature | −10°C to +70°C |
Storage temperature | −40°C to +85°C |
Relative humidity | 5–95%, non-condensing |
Temperature derating | Linear derating from 100% at +50°C to 50% at +70°C |
Maximum operating altitude | 5000 metres |
Full-power cooling requirement | 30 CFM forced air for the U-bracket version, or the enclosed version with cover and fan assembly |
Package dimensions | 4 × 8 × 2.58in |
U-bracket weight | Approximately 1.8kg |
Enclosed version weight | Approximately 2.0kg |
Medical safety standards | IEC 60601-1, UL ES 60601-1, CSA C22.2 No. 60601-1 and TÜV EN 60601-1 |
ITE safety standards | IEC, EN and UL 62368-1; CSA C22.2 No. 62368-1; TÜV EN 62368-1 |
Emissions | EN55011 and EN55032 Class B conducted and radiated |
Material compliance | RoHS compliant |
| Model | Nominal output | Max current | Max power |
|---|---|---|---|
PM651-12B | 12V | 50.00A | 600W |
PM651-13B | 15V | 40.00A | 600W |
PM651-13-1B | 18V | 36.12A | 650W |
PM651-14B | 24V | 27.09A | 650W |
PM651-15B | 28V | 23.22A | 650W |
PM651-16B | 30V | 21.67A | 650W |
PM651-16-1B | 32V | 20.32A | 650W |
PM651-17-1B | 34V | 19.12A | 650W |
PM651-17B | 36V | 18.06A | 650W |
PM651-18B | 48V | 13.55A | 650W |
PM651-19B | 57V | 11.41A | 650W |
PM651-19-1B | 58V | 11.21A | 650W |
Mechanical configurations
- B suffix: Open-frame PCB with U-bracket, using 30 CFM forced air supplied by the equipment
- C suffix: Enclosed format with cover and fan assembly
Interface signals
- PFD: TTL high during normal operation and low following loss of input power
- Inhibit: External TTL high disables the main output on standard models
- Remote sense: Compensates for up to 0.5V of output cable loss
- Standby supply: 5V at up to 200mA
- Fan supply: 12V at up to 500mA
Peak current note Peak current is available at a maximum 10% duty cycle for less than 15 seconds. Average output power must remain within the continuous rating of the selected model.
FAQs
for PM651 – 650W Open Frame Medical Power Supply
The series provides nominal single-output options of 12V, 15V, 18V, 24V, 28V, 30V, 32V, 34V, 36V, 48V, 57V and 58V. Maximum output current depends on the selected voltage model.
A U-bracket model requires 30 CFM of forced airflow to deliver its specified 600W or 650W continuous output. The enclosed C-suffix configuration incorporates a cover and fan assembly.
The B suffix identifies the open-frame U-bracket configuration. Replacing B with C identifies an enclosed version equipped with a cover and fan assembly, such as PM651-14C.
The series provides BF class insulation and a 4000 VAC input-to-output withstand rating specified as 2 MOPP. Compliance and suitability must also be assessed within the complete medical equipment design.
Yes, the models can operate at no load without damage. During no-load operation, burst-mode control may cause the output voltage to fluctuate beyond 5%.
Peak current may be used at a maximum duty cycle of 10% for less than 15 seconds. The average power must not exceed the continuous maximum output rating of the selected model.
The series includes overvoltage, short-circuit and overtemperature protection. Short-circuit protection recovers automatically, while overvoltage and overtemperature protection latch and require the AC input to be recycled.
Remote sensing can compensate for up to 0.5V of voltage loss between the power supply and the load. Sense wiring and output cabling should be routed in accordance with the equipment’s electrical and EMC design requirements.
Full rated operation is specified up to +50°C under the applicable cooling conditions. Output capacity must then be reduced linearly to 50% at +70°C.
The PM651 provides power-fail detection, output inhibit and a 5V standby output. The PFD signal is high during normal operation and changes low after input power is lost, while a TTL high inhibit signal disables the main output.
