Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833

603-778-2300 www.wallindustries.com Fax 603-778-9797

CMDBW Series

40 Watt Single Output

Chassis Mount DC/DC Converter

4:1 Ultra Wide Input Voltage Range

Rev. B

FEATURES

● High Efficiency up to 88%

● RoHS Directive Compliant

● Fixed Switching Frequency

● Six-Sided Continuous Shield

● 40 Watts Maximum Output power

● 4:1 Ultra Wide Input Voltage Range

● Call Factory for More Output Power Options

● Chassis Mount Options: Open Frame, U Channel, and Enclosed Types Available

SPECIFICATIONS: CMDBW Series

All specifications apply @ 25°C ambient unless otherwise noted

INPUT SPECIFICATIONS

Input Voltage Range ............ 24V nominal input ........................ 9 - 36VDC

48V nominal input ...................... 18 - 75VDC

Under Voltage Lockout

24V nominal input........... DC-DC ON..........................................9 VDC

DC-DC OFF ........................................8 VDC

48V nominal input........... DC-DC ON........................................18 VDC

DC-DC OFF ......................................16 VDC

Input Voltage Variation......... dv/dt ............................................ 5V/ms max

(Complies with ETS300 132 part 4.4)

Input Surge Voltage (100ms max) ............... 24V input ...................50VDC

48V input .................100VDC

Input Reflected Ripple Current (nominal Vin and FL) ...................20mAp-p

Start Up Time (nominal Vin and constant resistive load)

Power Up..............................................................................20ms max.

Remote ON/OFF ..................................................................20ms max.

Remote ON/OFF (See Note 1)

Positive Logic ................ DC-DC ON................Open or 3V < Vr < 12V

DC-DC OFF .............Short or 0V < Vr < 1.2V

Negative Logic ............... DC-DC ON...............Short or 0V < Vr < 1.2V

DC-DC OFF ..............Open or 3V < Vr < 12V

Remote Off Input Current (nominal Vin) ..............................................3mA

OUTPUT SPECIFICATIONS

Output Voltage ..............................................................................see table

Voltage Accuracy (nom Vin and full load) ........................................... ±1%

Voltage Adjustability........................................................................... ±10%

Output Current ..............................................................................see table

Output Power ........................................................................ 40 watts max.

Line Regulation (LL to HL at FL)....................................................... ±0.2%

Load Regulation (min. load to 100% load)....................................... ±0.5%

Minimum Load ..............................................................................see table

Ripple/Noise (See Note 4) ............................................................see table

Transient Response Recovery Time..................................................250us

(25% load step change)

PROTECTION SPECIFICATIONS

Over Voltage Protection....................................3.3V Output ............... 3.9V

(Zener diode clamp)

5V Output .................. 6.2V

12V Output ................. 15V

15V Output ................. 18V

±12V Output ............. ±15V

±15V Output ............. ±18V

Over Load Protection (% of FL at nominal input)...................... 150% max.

Short Circuit Protection ....................................Hiccup, automatic recovery

Over Temperature Protection .................................................... 110°C typ.

GENERAL SPECIFICATIONS

Efficiency ........................................................................................see table

Switching Frequency .................................................................300KHz typ.

Isolation Voltage

Input to Output ................................................................... 1600VDC min.

Input to Case ..................................................................... 1600VDC min.

Output to Case................................................................... 1600VDC min.

Isolation Resistance ...............................................................10

Isolation Capacitance ............................................................. 1500pF max.

ENVIRONMENTAL SPECIFICATIONS

Operating Ambient Temperature ............. -40°C to +55°C (without derating)

+55°C to +105°C (with derating)

Storage Temperature .......................................................... -55°C ~ +125°C

Maximum Case Temperature ........................................................... +105°C

Relative Humidity...................................................................5% to 95% RH

Temperature Coefficient ................................................... ±0.02% / °C max.

Thermal Impedance (See Note 3)

Without Heat-Sink.............................................................. 9.2°C / Watt

With Heat-Sink..................................................................... 7.6°C/Watt

Thermal Shock .................................................................... MIL-STD-810D

Vibration ................................10~55Hz, 10G, 30 minutes along X, Y, and Z

MTBF (See Note 2) ........Bellcore TR-NWT-000332............ 1.105 x 10

MIL-STD-217F ............................. 1.511 x 10

PHYSICAL SPECIFICATIONS

Potting material of the DC/DC Converter ..........................Epoxy (UL94-V0)

Shielding of the DC/DC Converter............................................... six – sided

Weight ............................................................................Approximately 7 oz

Dimensions............................................ 4.00(L) x 2.25(W) x 0.81(H) inches

SAFETY &EMC SPECIFICATIONS

Approvals and Standards .................. IEC60950-1, UL60950-1, EN60950-1

Conducted Emissions................. EN55022 ...................................... Class A

Radiated Emissions.................... EN55022........................................... Class A

ESD ............................................ EN61000-4-2.....................Perf. Criteria B

Radiated Immunity...................... EN61000-4-3..................... Perf. Criteria A

Fast Transient............................. EN61000-4-4.....................Perf. Criteria B

Surge .......................................... EN61000-4-5.....................Perf. Criteria B

Conducted Immunity................... EN61000-4-6.................... Perf. Criteria A

Due to advances in technology, specifications subject to change without notice

UL

TUV

CB

CE MARK