EMERSON LPT 40 Service Manual
LPT 40
40 Watts
LPT 40 Series
Total Power
40 - 55 Watts
Input Voltages
85 - 264 VAC
120 - 370 VDC
# of Outputs
Triple
SPECIAL FEATURES
• Universal input
• High efficiency
• Remote sense on main output
• Built-in EMI filter
• Low output ripple
• Adjustable main output
• Overvoltage protection
• Overload protection
• Enclosure kit available (see page 56 or
PowerFAX Doc. no 1025)
ENVIRONMENTAL
Operating temperature: 0° to 50°C ambient;
derate each output at 2.5% per degree from
50° to 70°C
Electromagnetic susceptibility: designed to
meet IEC 801, -2, -3, -4, -5, -6, Level 3
Humidity: Operating; non-condensing
5% to 95%
Vibration: Three orthogonal axes, sweep at
1 oct/min, 5 min. dwell at four major resonances
0.75 G peak 5 Hz to 500 Hz, operational
Storage temperature: -40° to 85°C
Temperature coefficient: ±.04% per °C
ELECTRICAL SPECIFICATIONS
Input
Input range ........................... 85-264 VAC
120-370 VDC
Frequency ............................ 47-440 Hz
Inrush current.......................<18 A peak @ 115 VAC;
<36 A peak @ 230 VAC,
cold start @ 25°C
Input current......................... 1 A max. (RMS) @ 115 VAC
Efficiency..............................70% typical at full load (60% for LPT41)
EMI filter ............................... FCC Class B conducted
CISPR 22 Class B conducted
EN55022 Class B conducted
VDE 0878 PT3 Class B conducted
Safety ground
leakage current .................... <0.5 mA @ 50/60 Hz, 264 VAC input
Output
Maximum power...................40 W for convection, (LPT41, 25W);
55 W with 30 CFM forced air (LPT41, 41W)
Adjustment range ................. -5, +10% minimum
Cross regulation................... ±2% on output 1; ±5% on outputs 2, 3
Hold-up time.........................20 ms @ 40 W load, 115 VAC nominal line
Overload protection..............Short circuit protection on all outputs.
Case overload protected @ 110-145%
above peak rating
Overvoltage protection ......... 5.7 to 6.7 VDC on main output
Remote sense ...................... Compensates for 0.5 V lead drop min. Will
operate without remote sense connected.
Reverse connection protected.
20
MTBF demonstrated: >550,000 hours at full
load and 25°C ambient conditions
SAFETY
Power Derating Curve
30 CFM Forced Air Cooling
Natural
Convection
Cooling
0°C
10°C20°C30°C40°C50°C60°C70°C
TA – Ambient Temperature – °C
27.5W
20W
Output
Power
(Watts)
55W
40W
30W
20W
10W
0W
USA: 1-888-41-ASTEC Europe (UK): 01384-842211 Asia (HK): 852-2437-9662
VDE0805/EN60950 (IEC950)11774-3336-1241 (LC# 84936)
ULUL1950E132002
CSACSA 22.2-234 Level 3LR53982C
NEMKOEN 60950/EMKO-TUEP94100374
(74-sec) 203
BABTEN60950/BS7002PS/604782
CB Certificate and report 1118,1122,1123,1124
CE Mark (LVD)
ASTEC ASIA
6F., China Dyeing Works Building
382-392 Castle Peak Road
Tsuen Wan, N.T., Hong Kong
Telephone: 852-2437-9662
Facsimile: 852-2402-4426
ASTEC EUROPE
Astec House, Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX, UK
Telephone: 01384-842211
Facsimile: 01384-843355
ASTEC AMERICA
5810 Van Allen Way
Carlsbad, CA 92008
Telephone: 760-930-4600
Facsimile: 760-930-0698
ORDERING INFORMATION
Model Output Minimum Maximum Load with Maximum Load with Peak Regulation2Ripple
Number Voltage Load Convection Cooling 30 CFM Forced Air Load
1
P/P (PARD)
LOW
Power
Low Power
3
LPT41 +3.3 V 0.5 A 4 A 7 A 7 A ±2% 50 mV
LPT42 +5 V 0.4 A 4 A 5 A 7 A ±2% 50 mV
LPT43 +5 V 0.5 A 6 A 8 A 9 A ±2% 50 mV
LPT44 +5 V 0.4 A 4 A 5 A 7 A ±2% 50 mV
LPT45 +5 V 0.4 A 4 A 5 A 7 A ±2% 50 mV
LPT46 +5 V 0.4 A 4 A 5 A 6 A ±2% 50 mV
LPT47 +5 V 0.4 A 4 A 5 A 6 A ±2% 50 mV
LPT48 +5 V 0.4 A 4 A 5 A 6 A ±2% 50 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. Minimum Loads are required.
DRAWINGS
0.22"
(5.6)
3.00"
(76.2)
2.55"
(64.8)
1.14"
(29)
+5 V 0 1.5 A 2.0 A 2.5 A ±2% 50 mV
+12 V 0 0.5 A 0.7 A 0.7 A ±5% 120 mV
+12 V 0.2 A 2 A 2.5 A 4 A ±5% 120 mV
-12 V 0 A 0.5 A 0.7 A 1 A ±5% 120 mV
+12 V 0 A 0.5 A 0.7 A 1 A ±5% 120 mV
-12 V 0 A 0.5 A 0.7 A 1 A ±5% 120 mV
+12 V 0.2 A 2 A 2.5 A 4 A ±5% 120 mV
-5 V 0 A 0.5 A 0.7 A 1 A ±5% 50 mV
+15 V 0.2 A 2 A 2.5 A 3 A ±5% 150 mV
-15 V 0 A 0.5 A 0.7 A 1 A ±5% 150 mV
+24 V 0.1 A 1.0 A 1.5 A 2 A ±7% 240 mV
+12 V 0 A 0.5 A 0.7 A 1 A ±5% 120 mV
+24 V 0.2 A 1.0 A 1.5 A 2 A ±7% 240 mV
-12 V 0 A 0.5 A 0.7 A 1 A ±5% 120 mV
+24 V 0.1 A 1.0 A 1.5 A 2 A ±7% 240 mV
-5 V 0 A 0.5 A 0.7 A 1 A ±5% 50 mV
MATING CONNECTORS
M1
SK 1
1
3NL
GND
4.56"
(115.8)
5.00"
(127)
SK201
M2
+
_
SK 2
1
2
3
4
5
6
Remote Sense
Connector
Voltage
Adj. Pot
0.15" (4)
DIA (4 places)
AC Input: Molex 09-50-8031 (USA)
09-91-0300 (UK)
PINS: 08-58-0111
DC Outputs: Molex 09-50-8061 (USA)
09-91-0600 (UK)
PINS: 08-58-0111
Remote Sense:Molex 22-01-2025
PINS: 08-50-0114
NOTES
1. Specifications subject to change without notice.
2. All dimensions in inches (mm), tolerance is ±.02”.
3. Mounting holes M1 and M2 should be grounded for EMI
purposes.
4. Mounting hole M1 is safety ground connection.
5. Specifications are for convection rating at factory
settings at 115 VAC input, 25°C unless otherwise
stated.
6. Warranty: 1 year
7. Weight: 0.5 lb. / 0.23 kg
LPT40
0.12"
(3)
PIN ASSIGNMENTS
Connector LPT41 LPT42 LPT43 LPT44 LPT45 LPT46 LPT47 LPT48
SK1-1 Neutral Neutral Neutral Neutral Neutral Neutral Neutral Neutral
SK1-3 Line Line Line Line Line Line Line Line
SK2-1 5 V +12 V +12 V +12 V +15 V +24 V +24 V +24 V
SK2-2 3.3 V +5 V +5 V +5 V +5 V +5 V +5 V +5 V
SK2-3 3.3 V +5 V +5 V +5 V +5 V +5 V +5 V +5 V
SK2-4 Common Common Common Common Common Common Common Common
SK2-5 Common Common Common Common Common Common Common Common
SK2-6 12 V -12 V -12 V -5 V -15 V +12 V -12 V -5 V
SK201-1 +Sense +Sense +Sense +Sense +Sense +Sense +Sense +Sense
SK201-2 -Sense -Sense -Sense -Sense -Sense -Sense -Sense -Sense
Power Fax: 760-930-0881
Doc No: 1016 • REV 5.5.99
21
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