Benign Environment
DC-DC Converters ≤100 Watt
H Series
50 Watt DC-DC Converters
H Series
Single output: series 12H/24H/48H1000
Double output: series 12H/24H/48H2000
Triple output: series 12H/24H/48H3000
• Wide input voltage range suitable for battery operation
• Efficient input filter and built-in surge and transient
suppression circuitry
• 3 kVrms input to output electric strength test
• Outputs individually isolated
• Outputs fully protected against overload
Safety according to IEC/EN 60950
LGA
C
111
4.37"
3U
168
39
6.6"
Summary
1.54"
8TE
The H series of DC-DC converters represents a broad and
flexible range of power supplies for use in advanced elec-
tronic systems. Features include high efficiency, reliability
and reasonable output voltage noise.
IEC/EN 60950 and have been approved by the safety
agencies LGA (Germany) and UL (USA). The UL Mark for
Canada has been officially recognized by regulatory au-
thorities in provinces across Canada.
The converter inputs are protected against surges and tran-
sients occuring at the source lines. An input over- and
undervoltage cut-out circuitry disables the outputs if the in-
put voltage is outside the specified range.
The case design allows operation at nominal load up to
50°C in a free air ambient temperature. If forced cooling is
provided, the ambient temperature may exceed 50°C but
the case temperature should remain below 80°C under all
conditions.
All outputs are open- and short-circuit proof and are pro-
tected against overvoltages by means of built-in suppres-
sor diodes. The outputs can be inhibited by a logic signal
applied to the connector pin 2 (i). If the inhibit function is not
used pin 2 should be connected to pin 23 to enable the out-
puts.
A temperature sensor generates an inhibit signal which
disables the outputs if the case temperature TC exceeds the
limit. The outputs are automatically re-enabled when the
temperature drops below the limit.
LED indicators display the status of the converter and allow
visual monitoring of the system at any time.
Various options are available to adapt the converters to in-
dividual applications.
Full input to output, input to case, output to case and output
to output isolation is provided. The modules are designed
and built according to the international safety standard
The modules may either be plugged into 19 inch rack sys-
tems according to DIN 41494, or be chassis mounted.
Table of Contents
Page
Page
Summary.......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Key .......................................................................... 2
Functional Description...................................................... 3
Electrical Input Data ......................................................... 4
Electrical Output Data ...................................................... 5
Auxiliary Functions ........................................................... 8
Electromagnetic Compatibility (EMC) ............................ 10
Mechanical Data ............................................................ 11
Immunity to Environmental Conditions........................... 12
Safety and Installation Instructions ................................ 12
Description of Options.................................................... 15
Accessories .................................................................... 19
Edition 4/4.99
1/19
MELCHER
The Power Partners.