Dual-output, dc/dc Converter Suits Railway and other Extreme Environments0 pages
250W, Dual‐Output Encapsulated DC/DC Converter for Railway and Extreme Environments
RWY 252H Series
Rugged, field‐proven design
Fully independent, dual output
Full encapsulation
Wide temperature range
Full electronic protection
EN50155 input ranges
This fully encapsulated, dual output, railway quality DC/DC converter uses a field‐proven high efficiency power conversion topology to
generate 250W output power. The unit has two fully independent, regulated isolated output stages, V1 providing up to 140W and V2
up to 110W. The design is based on the field‐proven RWY 150 and RWY 100 series topology, which has a track record in numerous
applications. It is entirely potted with a thermally conductive MIL‐grade silicon rubber compound to ensure immunity to shock,
vibration and humidity. The unit is conduction cooled via a base plate to a heat‐sinking surface. Low component count, large design
headroom, and the use of components with established reliability result in a high MTBF. It meets the requirements of EN50155 for
electronic equipment used on rolling stock. The unit is also suitable for transportation, mining, military, marine and other harsh
environments. The series is manufactured at our plant under strict quality control. Customized versions are also available.
SPECIFICATIONS
Standard Input Voltages
24Vdc (14.4 – 34V)
36Vdc (22 – 51V)
48Vdc (29 ‐ 67V)
72Vdc (43 – 101V)
96Vdc (58 – 135V)
110Vdc (66 ‐ 154V)
Other inputs upon request
Input Protection
Inrush current limiting
Varistor
Reverse polarity protection
Internal safety fuse
Lower voltage than specified
minimum input will not damage
unit
Isolation
1500Vdc input to chassis
3000Vdc input to output
1500Vdc output to chassis
1000Vdc output to output
Standards
Meets EN60950 and EN50155
Immunity
Meets criteria of EN50155 and
EN50121‐3‐2 including
EN 61000‐4‐2 (ESD)
EN61000‐4‐3 (RF Immunity)
EN61000‐4‐4 (Fast Transients)
EN50155 (Surge)
EN61000‐4‐6 (Conducted Imm.)
EN50155 (Voltage Variations)
EMI
EN55022 Class B and EN50121‐3‐2
Conducted and radiated
Switching Frequency
V1: 80kHz ±5kHz
V2: 130kHz ±5kHz
Output Voltage/Current
V1: any single voltage 5V to 110Vdc
limited by 12A max current handling
capacity, or power capacity 140W
V2: any single voltage 5V to 110dc
limited by 8A max current handling
capacity, or power capacity 110W.
Both outputs are individually
regulated, floating and either
terminal can be grounded
Returns are separated.
Redundancy Diode
None
Line/Load Regulation
±1% combined from zero load
to full load on each output
Dynamic Response
Max 5% voltage deviation for 10%
to 50% load step, with better than
1msec recovery time
Output Ripple/Noise
Less than 1% peak‐to‐peak or
0.2% RMS of the output voltage
(20MHZ BW) on each output
Output Overload Protection
Rectangular current limiting with
short‐circuit protection on each
output (hiccup type).
Output Overvoltage Protection
Transzorb installed across each
output
Efficiency
Typically 85% at full load
depending on input/output
configuration
Operating Temperature Range
o
‐40 to +70 C cold‐plate
temperature for full specification
Temperature Drift
0.03% per ºC over operating
temperature range
Cooling
Conduction via baseplate
to customer chassis or heat‐sink
Environmental Protection
Full encapsulation with thermally
conductive silicon potting
compound with UL94V‐0
flammability rating
Shock/Vibration
IEC 61373 Cat 1 A&B
Humidity
5‐ 95% non‐condensing
Contact factory for higher rating
MTBF
o
150,000 hours @ 45 C
Demonstrated MTBF is
significantly higher
Indicators
None.
Optional ’ON’ LED adapter can be
installed on the terminal block.
Control Input
None
Alarm Output
None
Package/Dimensions
P300H: 113 x 60 x 200 mm
(4.5" x 2.4" x 7.9") including
terminal block and flanges.
Mounting holes are clear
Weight
1.5 kg (3.3 lbs)
Connections
9 pole barrier‐type terminal block
with 3/8” spacing
Cover provided on request
RoHS Compliance
Fully compliant
Warranty
Two years subject to application
within good engineering practice.
Terminal Block pin‐out
Enhancements to these general specifications and customizing can be accommodated upon request. Specifications are subject to change.
Designer and manufacturer of quality ac‐dc power supplies and battery chargers, converters, inverters, dc‐output UPS systems, complete rack mount systems and DC‐input
fluorescent lamp inverters since 1982. Custom or standard. Absopulse is a BABT‐approved Facility.
ABSOPULSE ELECTRONICS LTD
110 Walgreen Road, Ottawa. Ontario. K0A 1L0. CANADA
Tel: +1‐613‐836‐3511 | Fax: +1‐613‐836‐7488
E‐mail: absopulse@absopulse.com | http://www.absopulse.com
For further information, please see: April 14, 2012/TS/CL
Made in Canada
http://www.absopulse.com/Absopulse_railway_mobile_extreme_environment_solutions.php