Rev. A

DCREDUW20 Series

Single & Dual Outputs

4:1 Input Voltage Range

20 Watt DC/DC Power Converters

Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833

02/26/2013

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

Page 3 of 5

MODEL SELECTION TABLES

NOTES

1.

BELLCORE TR-NWT-000332. Case 1: 50% Stress, Temperature at 40°C.

MIL-HDBK-217F Notice2 @Ta=25°C, Full load (Ground, Benign, controlled environment).

2.

Typical value at nominal input voltage and no load.

3.

Typical value at nominal input voltage and full load.

4.

Test by minimum Vin and constant resistive load.

5.

Trimming allows the user to increase or decrease the output voltage set point of the module. This is accomplished by connecting an external resistor between the TRIM

pin and either the +Vout pin or the –Vout pin.

6.

The ON/OFF control pin voltage is reference to –Vin. Positive Logic comes standard and to order negative logic remote on/off add the suffix “R” to the model number.

7.

Operating Temperature:

These converters can meet the railway T2 and TX temperature requirements.

T2: -40°C to +70°C for all models, TX: -40°C to +85 with power derating to 55% output power. (With heatsink the power derates to 70% output power).

Test conditions with vertical direction by natural convection (20LFM).

8.

Heatsink is optional and P/N: 7G-0020C-F. See “Product Standard Table” on page 5 for ordering information.

9.

EN55022 and EN55011

1) 24Vin and 48Vin Models: To meet Class B the modules do not need an external filter.

2) 110Vin Models: To meet Class A the modules do not need an external filter.

10. An external input filter capacitor is required if the module has to meet EN61000-4-4 and EN61000-4-5.

The filter capacitor suggested for 24Vin and 48Vin models is Nippon chemi-con KY series, 220

μF /100V, ESR 48mΩ.

The filter capacitor suggested for 110Vin models is Rubycon BXF series, 100

μF /250V.

11. There are several different options available for this series. Please see the “Product Standard Table” on page 4 for all options and ordering information.

CAUTION: This power converter is not internally fused. An input line fuse must always be used.

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

SINGLE OUTPUT MODELS

Model Number

Input Voltage

Range

Output

Voltage

Output Current

Input

(2)

Current

Over Voltage

Protection

Ripple &

Noise

(3)

Output

Power

Efficiency

(3)

Maximum

(4)

Capacitive Load

Min. Load

Full Load

DCRED24S33UW20

24 VDC

(9 – 36 VDC)

3.3 VDC

0mA

4500mA

6mA

3.7 - 5.4 VDC

75mVp-p

14.8W

85%

7000µF

DCRED24S5UW20

5 VDC

0mA

4000mA

6mA

5.6 - 7.0 VDC

75mVp-p

20W

88%

5000

µF

DCRED24S12UW20

12 VDC

0mA

1670mA

6mA

13.5 - 19.6 VDC 100mVp-p

20W

89%

850µF

DCRED24S15UW20

15 VDC

0mA

1330mA

6mA

16.8 - 20.5 VDC 100mVp-p

20W

88%

700µF

DCRED48S33UW20

48 VDC

(18 – 75 VDC)

3.3 VDC

0mA

4500mA

4mA

3.7 - 5.4 VDC

75mVp-p

14.8W

85%

7000µF

DCRED48S5UW20

5 VDC

0mA

4000mA

4mA

5.6 - 7.0 VDC

75mVp-p

20W

88%

5000

µF

DCRED48S12UW20

12 VDC

0mA

1670mA

4mA

13.5 - 19.6 VDC 100mVp-p

20W

89%

850µF

DCRED48S15UW20

15 VDC

0mA

1330mA

4mA

16.8 - 20.5 VDC 100mVp-p

20W

89%

700µF

DCRED110S33UW20

110 VDC

(43 – 160 VDC)

3.3 VDC

0mA

4500mA

3mA

3.7 - 5.4 VDC

75mVp-p

14.8W

85%

7000µF

DCRED110S5UW20

5 VDC

0mA

4000mA

3mA

5.6 - 7.0 VDC

75mVp-p

20W

87%

5000

µF

DCRED110S12UW20

12 VDC

0mA

1670mA

3mA

13.5 - 19.6 VDC 100mVp-p

20W

88%

850µF

DCRED110S15UW20

15 VDC

0mA

1330mA

3mA

16.8 - 20.5 VDC 100mVp-p

20W

89%

700µF

DUAL OUTPUT MODELS

Model Number

Input Voltage

Range

Output

Voltage

Output Current

No load

(2)

Input Current

Ripple & Noise

(3)

Output Power Efficiency

(3)

Maximum

(4)

Capacitive Load

Min. Load

Full Load

DCRED24D12UW20

24 VDC

(9 – 36 VDC)

±12 VDC

0mA

±833mA

6mA

100mVp-p

20W

88%

±500µF

DCRED24D15UW20

±15 VDC

0mA

±667mA

6mA

100mVp-p

20W

89%

±350µF

DCRED48D12UW20

48 VDC

(18 – 75 VDC)

±12 VDC

0mA

±833mA

4mA

100mVp-p

20W

88%

±500µF

DCRED48D15UW20

±15 VDC

0mA

±667mA

4mA

100mVp-p

20W

89%

±350µF

DCRED110D12UW20

110 VDC

(43 – 160 VDC)

±12 VDC

0mA

±833mA

3mA

100mVp-p

20W

88%

±500µF

DCRED110D15UW20

±15 VDC

0mA

±667mA

3mA

100mVp-p

20W

89%

±350µF