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

S P E C I A L F E A T U R E S

•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)

E N V I R O N M E N T A L

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

MTBF demonstrated: >550,000 hours at full load and 25°C ambient conditions

Power Derating Curve

		55W
			30 CFM Forced Air Cooling
		40W
	Output	30W	Natural	27.5W
	Power
			Convection
	(Watts)	20W		20W
			Cooling
		10W
		0W
			0°C 10°C 20°C 30°C 40°C 50°C 60°C 70°C
			TA – Ambient Temperature – °C

E L E C T R I C A L S P E C I F I C A T I O N S

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.

S A F E T Y

VDE	0805/EN60950 (IEC950)	11774-3336-1241 (LC# 84936)
UL	UL1950	E132002
CSA	CSA 22.2-234 Level 3	LR53982C
NEMKO EN 60950/EMKO-TUE		P94100374
	(74-sec) 203
BABT	EN60950/BS7002	PS/604782
CB	Certificate and report	1118,1122,1123,1124
CE	Mark (LVD)

20 USA: 1-888-41-ASTEC Europe (UK): 01384-842211 Asia (HK): 852-2437-9662