
PALS AC-DC Series Data Sheet
Power-over-Ethernet
Features
? RoHS lead free solder and lead solder exempted
products are available
? Single-phase AC input
? Up to 9 W/in3 power density
? 1U or 3U height configurations
? Power Factor Correction (PFC) Meets EN61000-3-2
? Current share with ORing diodes
? Overtemperature, overload, and overvoltage
protection
? Power supply status indicators
? I2C protocol alarms, status, & control
? Standby voltage - 12 VDC @ 500 mA with
ORing diode
? Enable signal for each output
The PALS Series consists of 400 and 600 watt ac-dc power supplies designed specifically for use in power-over-
ethernet applications. The supplies have dual outputs of 48 and 12 volts which provide LAN port and internal system
power. A 500 mA standby output facilitates I 2 C interface operations. The units are fully-enclosed, have 1500 VAC
(2250 VDC) output isolation, and comply to IEEE802.3AF.
The PALS Series provides excellent protection against input voltage transients. Supply outputs are fully floating,
meaning that users can use them for either positive or negative polarity needs.
Output voltage terminals and interface access is through a hot-swap connector at the rear of the supply. The AC input
fans, handle, and LED indicator lights are located on the front panel of the supply. Airflow is from the front through the
rear. Alarm, monitoring, and control signals are floating from the rear output and can be referenced.
The PALS Series meets international safety requirements and is CE Marked to the Low Voltage Directive.
Model Selection
MODEL
PALS400-2482
PALS600-2482
TOTAL OUTPUT
POWER (WATTS)
400
600
OUTPUT
VOLTAGE
48V
12V
48V
12V
MAXIMUM OUTPUT
CURRENT
8A
16A
9A
16A
LINE
REGULATION
0.1%
0.1%
0.1%
0.1%
LOAD
REGULATION 1
0.2%
0.2%
0.2%
0.2%
RIPPLE & NOISE
mVp-p 2
120
120
120
120
INITIAL SETTING
ACCURACY
0.2%
0.2%
0.2%
0.2%
NOTES:
1 With Remote Sense connected.
2 Maximum peak-to-peak noise expressed as a percentage of output voltage, 20 MHz bandwidth.
Input Specifications
PARAMETER
Input Voltage - AC
Input Frequency
CONDITIONS/DESCRIPTION
Single-phase continuous input range.
AC input.
MIN
85
47
NOM
MAX
264
63
UNITS
VAC
Hz
Hold-up Time
Input Current
Inrush Surge Current
Power Factor
Operating Frequencies
After last AC line peak at full power.
At full rated load.
Internally limited by thermistor.
Per EN61000-3-2
Boost frequency
Forward converter frequency
At 115 VAC.
At 85 VAC. PALS400:
At 85 VAC. PALS600:
Vin = 115VAC (one cycle). 25° C.
20
0.98
95
125
6.5
10
17
ms
Arms
Apk
W/VA
kHz
MCD10129 Rev. 1.0, 26-Oct-09
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