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

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

CMMD Series

20 Watt Single Output

2:1 Wide Input Voltage Range

Chassis Mount DC/DC Converter

Rev. B

FEATURES

● Output Current up to 6A

● 2:1 Wide Input Voltage Range

● Six-Sided Continuous Shielding

● 20 Watts Maximum Output Power

● Options: Negative Logic Remote ON/OFF

● Call Factory for More Output Power Options

● Compliant to RoHS EU Directive 2002/95/EC

● CE Mark Meets 2006/95/EC, 93/68/EEC, and 89/336 EEC

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

SPECIFICATIONS: CMMD Series

All specifications apply @ 25°C ambient unless otherwise noted

INPUT SPECIFICATIONS

Input Voltage Range ............ 12V nominal input .......................... 9-18VDC

24V nominal input ........................ 18-36VDC

48V nominal input ........................ 36-75VDC

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

(Complies with ETS300 132 part 4.4)

Input Surge Voltage (100ms max) ....... 12V input ...........................36VDC

24V input ...........................50VDC

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

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

Start Up Time (nominal Vin and constant resistive load)

Power Up................................................................................10ms typ.

Remote ON/OFF ....................................................................10ms typ.

Remote ON/OFF (Note 6)

(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

Input Current of Remote Control Pin (nominal Vin) ........ -0.5mA ~ +0.5mA

Remote Off Input Current (nominal Vin) ...........................................2.5mA

OUTPUT SPECIFICATIONS

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

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

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

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

Output Power ........................................................................ 20 watts max.

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

Load Regulation (no load to full load) ............................................... ±0.5%

Minimum Load ....................................................................................... 0%

Ripple/Noise (20 MHz BW) ...........................................................see table

(measured with a 0.1uF/50V MLCC)

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

Transient Response Recovery Time (25% load step) .......................250us

PROTECTION SPECIFICATIONS

Over Voltage Protection........... 1.5, 1.8, 2.5, 3.3V outputs..................3.9V

(zener diode clamp)

5V output ........................................6.2V

12V output .........................................15V

15V output .........................................18V

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

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

GENERAL SPECIFICATIONS

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

Switching Frequency .................................................................500KHz typ.

Isolation Voltage (Input to Output)......................................... 1600VDC min.

Isolation Voltage (Input to case) ............................................ 1600VDC min.

Isolation Voltage (Output to Case) ........................................ 1600VDC min.

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

Isolation Capacitance .............................................................. 1000pF max.

ENVIRONMENTAL SPECIFICATIONS

Operating Temperature ................................ -40°C ~ +85°C (with derating)

Storage Temperature .......................................................... -55°C ~ +105°C

Maximum Case Temperature ............................................................. 100°C

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

Thermal Impedance (Note 7)

Natural Convection ............................................................. 12°C / Watt

Natural Convection with Heat-Sink..................................... 10°C / Watt

Thermal Shock ..................................................................... MIL-STD-810F

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

MTBF (Note 1).................................................................. 1.791 x 10

PHYSICAL SPECIFICATIONS

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

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

Weight .............................................................................Approximately 6oz

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

SAFETY & EMC

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

EMI .............................EN55022 ...................................................... Class A

ESD ....................EN61000-4-2……..

…….Perf. Criteria B

Radiated Immunity......EN61000-4-3 ....................... 10V/m Perf. Criteria A

Fast Transient.............EN61000-4-4 ......................... ±2KV Perf. Criteria B

Surge ..........................EN61000-4-5 ......................... ±1KV Perf. Criteria B

Conducted Immunity...EN61000-4-6 .................... 10 Vrms Perf. Criteria A

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

APPLICATIONS

● Measurement

● Wireless Network

● Telecom/Datacom

● Industry Control System

● Semiconductor Equipment

Air ± 8KV

Contact ± 6KV