WWW.PHIHONG.COM
275-Watt Power-Over-Ethernet Power Supply
PSM275-909 with active Power Factor Correction
Features
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12V for Switch plus PoE
8-24 Ports PoE
RS232 with Windows GUI
EMI Class B
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Power Management
Full Protection OVP, OTP, OCP, UVP
1U
Operate from AC or Single Voltage 48V
RPS Source
Applications
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10/100 Base T Ethernet switches
Security Systems
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VoIP Phone systems
Blades
Safety Approvals
cUL/UL
CE
TUV
Mechanical Characteristics
Length: 197.5mm (7.78in)
Width: 105mm (4.13in)
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Height: 40mm (1.57in)
Weight: 1kg (2.5lb.)
Output Specifications
Model
PSM275-909
DC Output
Voltage
Load (2)
Min.
Max.
Ripple (1)
P-P (max)
Regulation
Line
Load
±5%
±2%
50V (per port)
0A
0.35A
≤20KHz
300mVp-p
>20KHz 50mVp-p
±2%
±5%
12V
0.75A
6.25A
Note: (1) Noise is measured with resistor load (not as electronic load). The output is decoupled with 10uF bulk electrolytic
and 0.1uF ceramic capacitor. Measurement is made with a high impedance probe connected across the decoupling
capacitance. Band width limited to 100mHz. (2) The sum of total powered ports cannot exceed 200W.
Phihong reserves the right to make changes without further notice. Please consult Phihong USA and visit
www.phihong.com
for the most up-to-date specifications.
PHIHONG [ PHIHONG USA INC. ]
