revB 04.02.02
America’s (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211 Asia (HK): 852-2437-9662
122
Special Features
Electrical Specs
250 Watts
LPS250 Series
Input
Input range 85-264 VAC; 120-300 VDC
Frequency 47-440 Hz
Inrush current 20 A max., cold start @ 25°C
Efficiency 75% t ypical at full load
EMI filter FCC Class B conducted and radiated
CISPR 22 Class B conducted and
radiated EN55022 Class B conducted
and radiated VDE 0878 PT3 Class B
conducted and radiated
Power factor 0.99 t ypical
Safet y ground
leakage current <0.5 mA @ 50/60 Hz, 264 VAC input
Output
Maximum power With cover: 250 W with 30 CFM
forced air.
(-C) (-CF) (CEF)
Adjustment range 2:1 wide ratio
Supervisory output 5 V @ 100 mA regulated; 12V @ 500
mA
Hold-up time 20 ms @ 250 W load, 115 VAC
nominal line
at factor y voltage setting
Overload protection Shor t circuit protection on all outputs.
Case overload protected @ 110-145%
above peak rating
Over voltage protection 5 V output: 5.7 to 6.7 VDC.
Other models 10% to 25% above
nominal output
Logic Control
Power failure T TL logic signal goes high 50-150
msec after 5 V output. It goes low at
leas t 4 msec before loss of regulation
Remote on/off Requires an external contact (N.O or
N.C) to inhibit outputs
DC OK T TL logic goes high 50-150 msec after
the output. It goes low when there is
loss of regulation.
Remote sense Compensates for 0.5 V lead drop min.
Will operate without remote sense
connected. Reverse connection
protected.
• Active power fac tor correction
• IEC EN6100-3-2 compliance
• Remote sense & remote inhibit
•Power fail
• Single wire current sharing
• Built-in EMI filter
• Low output ripple
• 2 Supervisory outputs 5 V and 12 V
• Overvoltage protection
• Overload protection
• Thermal overload protec tion
• DC power good
•Cover -C
• 120 kHz switching frequency
• Optional top with fan cover -CF
• Optional end fan cover -CEF
Operating temperature: 0° to 50°C ambient
derate each output at 2.5% per degree from 50° to
70°C
Electromagnetic susceptibilit y: Designed to meet
IEC 801, -2, -3, -4, -5, -6, Level 3
Humidit y: Operating; non-condensing
5% to 95%
Vibration: Three orthogonal axes, sweep at
1 oct/min, 5 min. dwell at four major resonances
0.7 G peak 5 Hz to 500 Hz, operational
Storage temperature: -40° to 85°C
Temperature coefficient: ±.04% per °C
MTBF demonstrated: >550,000 hours at full load
and 25°C ambient conditionsation
Environmental
Total Power: 250 Watts
Input Voltage: 85-264 VAC
120-300 VDC
# of Outputs: Single
EUROPE
Astec House, Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX, UK
Telephone: 44 (1384) 842-211
Fac simile: 44 (1384) 843-355
AMERICAS
5810 Van Allen Way
Carlsbad, CA 92008
Telephone: 760-930-4600
Fac simile: 760-930-0698
123
www.astec.com
Ordering Information
ASIA
Units 2111-2116, Level 21
Tower1, Metroplaza
223, Hing Fong Road
Fwai Fong, New Territories
Hong Kong
Telephone: 852-2437-9662
Fac simile: 852-2402-4426
5.0 (127.0) 2.0
(50.8)
1.18 (30.0)
9.0
(228.6)
6.64
(168.6)
3.42 (87.0)
.79
(20)
SK3
SK1
12345678
3 2 1
SK5
+ve -ve
Terminal
Block TB1
O/P ADJ.
SK4
FAN
#6-32 UNC (8 places)
5.46
(138.6)
8.52
(216.4)
M3 (4 places)
3.68
(93.6)
3.15
(80)
2.17
(55)
3.0
(76.2)
.55
(14) 1.30
(33.0)
Optional
(-CF)
Cover 
with Fan
Optional 
(-CEF) 
Cover 
with fans
10.32
(262.0)
SK7
FAN
AC Inlet
10.0
10.0
10.0
.24 (6.1)
6-32 (2 places)
Main Output
6-32 (3 places)
Model Output Minimum Maximum Load with Peak Regulation2 Ripple
Num ber Voltage Load 30 CFM Forced Air Load1 P/P (PARD)3
LPS252-C 5 V (3-6 V) 1.50 A 50 A 60 A ±2% 50 mV
LPS253-C 12 V (6-12 V) 0.63 A 21 A 25 A ±2% 120 mV
LPS254-C 15 V (12-24 V) 0.50 A 16.7 A 20 A ±2% 150 mV
LPS255-C 24 V ( 24-48 V) 0.32 A 10.4 A 12.5 A ±2% 240 mV
1. Peak current lasting <30 seconds with a maximum 10% duty cycle.
2. At 25°C including initial tolerance, line voltage, load currents and output voltages adjusted to factory settings.
3. Peak-to-peak with 20 MHz bandwidth and 10 µF in parallel with a 0.1 µF capacitor at rated line voltage and load ranges.
4. If optional CF or CEF fans are not used, 30CFM forced air cooling needs to be provided and is required through the length of the power supply. Not convection rated.
5. Output voltage adjustment requires a minimum load.
6. Remote inhibit resets OVP ;atch
Note: -CF suffix added to the model number indicates cover with top fan. -CEF suffix added to the model number indicates cover with dual end mounted fan cover and
AC inlet.
Connector
SK1 PIN 1 Neutral
PIN 2 Line
PIN 3 Ground
SK3 PIN 1 + Remote sense
PIN 2 - Remote sense
PIN 3 Remote inhibit (N.O)
PIN 4 Remote inhibit (N.C)
PIN 5 Common
PIN 6 Current sharing
PIN 7 Power Fail
PIN 8 DC Power Good
SK4 PIN 1 + Fan’s power source (12 V @ 500 mA)
PIN 2 - Fan’s power source (12 V @ 500 mA)
SK5 PIN 1
+ Supervisory output supply (5 V @ 100 mA)
PIN 2
- Supervisory output supply (5 V @ 100 mA)
SK7 PIN 1 + Fan’s power source (12 V @ 500 mA)
PIN 2 - Fan’s power source (12 V @ 500 mA)
Mating Connectors
SK3 Molex 22-01-1084
PINS:08-70-0057
SK4 Molex 22-01-3027
PINS: 08-50-0114
SK5 Molex 22-01-3027
PINS: 08-50-0114
SK7 Molex 22-01-3027
PINS: 08-50-0114
Astec Connector Kit #70-841-005, includes all the above.
VDE 0805/EN60950 (IEC950) 11774-3336-1262
UL UL1950 E132002
CSA CSA 22.2-234 Level 5 LR53982C
NEMKO EN 60950/EMKO-TUE P95103843
(74-sec) 203
BABT EN60950/BS7002 PS/606027
CB Certificate and report 2241
CE Mark (LVD)
Safety
Pin Assignments
LPS250 Series
Notes:
1. Specifications subject to change without notice.
2. All dimensions in inches (mm), tolerance is ±.02”.
3. Specifications are at factor y settings.
4. To enable normally closed remote inhibit, cut
jumper J1.
5. Mounting maximum insertion depth is 0.12”.
6. Warrant y: 1 year
7. Weight: 2.6 lb / 1.19 kg