EMERSON LPS172-M, LPS173-M, LPS174-M, LPS175-M Service Manual

Embedded Power for
Business-Critical Continuity

LPS170-M Series

Medical
175 Watts

Special Features

• Medical safety approvals

• Active power factor correction

• IEC EN61000-3-2 compliance

• Wide Range Adjustable output
Remote sense on main output

• Single wire current sharing

• Power fail and remote inhibit

• Built-in EMI filter

• Low output ripple

• Overvoltage protection

• Overload protection

• Thermal overload protection

• DC power good

• 5 V standby output

• 12 V Aux output

• Optional cover (-C suffix)

Total Power: 100 - 175 Watts
Input Voltage: 85-264 VAC

120-300 VDC

# of Outputs: Single

Electrical Specifications

Safety

Input

Input ra nge 85-264 VAC; 120-300 VDC
Frequency 47-67 Hz
Inrush current 38 A max, cold start @ 25°C
Efficiency 75% typical at full load
EMI filter FCC Class B conducted

CISPR 22 Class B conducted
EN55022 Class B conducted
VDE 0878 PT3 Class B conducted

Power Factor 0.99 typical

Safety ground
leakage current

<250 μA @ 50/60 Hz, 264 VAC inputS

Output

Maximum power 110 W convection (75 W with cover)

175 W with 30 CFM forced air
(130 W with cover)

Adjustment range 2:1 wide ratio minimum

Standby outputs 5 V @ 2 A regulated ±5%
Hold-up time 20 ms @175 W load at nominal line
Overload protection Short circuit protection on all outputs.

Case overload protected @ 110-145% above peak rating

Overvoltage protection 10% to 40% above nominal output

Aux output 12 V @ 1 A -5 %, +10%

VDE 0750/EN60601-1 (IEC601)
UL UL2601
CSA CSA 22.2 No. 601.1
CE Mark (LVD)

Rev. 08.07.07

LPS170-M Series

1 of 3

Embedded Power for
Business-Critical Continuity

Ordering Information

Model
Number

Output
Voltage

Minimum
Load

Maximum Load with
Convection Cooling

Maximum
Load with
30CFM
forced Air Peak Load 1Regulation

2

Ripple P/P
(PARD)

3

LPS172-M 5 V (2.5 - 6 V) 0 A 22 A 35 A 38 A ±2% 50 mV

LPS173-M 12 V (6 - 12 V) 0 A 9.1 A 15 A 16.5 A ±2% 120 mV

LPS174-M 15 V (12 - 24 V) 0A 7.3 A 12 A 13.2 A ±2% <1%

LPS175-M 24 V (24 - 54 V) 0A 4.5 A 7.5 A 8.2 A ±2% <1%

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. Remote inhibit resets OVP latch.

Note: -C suffix added to the model number indicates cover option.

Rev. 08.07.07

LPS170-M Series

2 of 3

Operating temperature: 0° to 50°C ambient;

derate each output at 2.5% per degree from 50° to 70°C

Storage temperature: -40°C to +85°C

Temperature coefficient:

±0.4% per °C
Storage temperature: -40° to 85°C
Electromagnetic

susceptibility: Designed to meet IEC EN61000-4, -2, -3, -4, -5, -6, -8, -11 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 0.75G peak 5Hz to 500Hz, operational
MTBF demonstrated: >550,000 hours at full load and 25°C ambient conditions

Environmental Specifications

Logic Control

Power failure

TTL logic signal goes high 100 - 500 msec after V1 output; It
goes low at least 4 msec before loss of regulation

Remote inhibit Requires contact closure to inhibit outputs

Remote sense

Compensates for 0.5 V lead drop min. Will operate without
remote sense connected. Reverse connection protected.

DC - OK

TTL logic signal goes high after main output is in regulation. It
goes low when there is a loss of regulation

Mating Connectors
(SK4) AC Input: Molex 09-50-8051 (USA)

Molex 09-91-0500 (UK)
PINS: 08-58-0111

(SK3) DC Output:

Molex 19141-0058

(SK1) Control Signals:

Molex 90142-0010 (USA)
PINS: 90119-2110 or
Amp: 87977-3
PINS: 87309-8

Astec connector kit #70-841-016

Notes:

1. Specifications subject to change without notice.

2. All dimensions in inches (mm), tolerance is ±0.02”.

3. Specifications are for convection rating at factory settings unless
otherwise stated.

4. Mounting screw maximum insertion depth is 0.12”.

5. Warranty: 2 year

6. Weight: 1.8 lb / 0.85 kg

Pin Assignments

Connector LPS17x

SK1 PIN 1 +12 V

PIN 2 5 V Standby

Pin 3 Common

Pin 4 V1 SWP

PIN 5 Common

PIN 6 +V1 sense

PIN 7 Sense common

PIN 8 Remote inhibit

PIN 9 DC poer good

PIN 10 POK

SK2

TB-1 COMMON

TB-2 Main output

SK3

PIN 1 GROUND

PIN 2 LINE

Pin 5 NEUTRAL

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Embedded Power for
Business-Critical Continuity

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Telephone: [phone]
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Europe (UK)

Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX
United Kingdom
Telephone: [phone]
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Asia (HK)

16th - 17th Floors, Lu Plaza
2 Wing Yip Street, Kwun Tong
Kowloon, Hong Kong
Telephone: [phone]
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For global contact, visit:

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[e-mail]
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While every precaution has been taken to ensure
accuracy and completeness in this literature, Emerson
Network Power assumes no responsibility, and disclaims
all liability for damages resulting from use of this
information or for any errors or omissions.

Rev. 08.07.07

LPS170-M Series

3 of 3

Mechanical Drawing