0

10

20

30

40

50

60

70

0

10

20

30

40

50

60

70

Ambient Temperature (C)

F O R C E D

A I R

C O O L I N G

C O N V E C T I O N

C O O L I N G

C O N V E C T I O N

C O O L I N G

W I T H

C H A S S I S / C O V E R





REL-70 MECHANICAL SPECIFICATIONS

APPLICATIONS INFORMATION

1.

Each output can deliver its rated current but Total Output Power must not exceed 70W, as

determined by the cooling method.

2.

Generally, adequate cooling is provided when semiconductor case temperatures do not

exceed 70°C rise and transformer temperature does not exceed 60°C rise at any

specified ambient temperature.

3.

Sufficient area must be provided around power supply to allow natural movement of air to

develop in convection-cooled applications.

4.

This product is intended for use as a professionally-installed component within information

technology, industrial, and medical equipment and is not intended for stand-alone

operation.

5.

A minimum load of 10% is required on Output 1 to ensure proper regulation of remaining

outputs.

6.

This product includes only one fuse in the input circuit. In consideration of Clause 8.11.5

of IEC 60601-1:2005, a second fuse may be required in the end product.

7.

Peak-to-Peak Output Ripple and Noise is measured directly at the output terminals of the

power supply, without the use of the probe ground lead or retractable tip (tip-and-barrel

method), 20 MHz bandwidth.

8.

This product was type-tested and safety-certified using the dielectric strength test voltages

listed in Table 6 of IEC 60601-1:2005. In consideration of Clause 8.8.3, care must be

taken to insure that the voltage applied to a reinforced insulation does not overstress

different types and levels of insulation. Primary and secondary-to-ground capacitors may

need to be disconnected prior to performing a dielectric strength test on the power supply

or the end product. It is highly recommended that the DC test voltages listed in DVB.1,

Annex DVB of UL 60601-1 1st Edition are not exceeded during a production-line dielectric

strength test of the assembled end product. Please consult factory for further information.

9.

This power supply has been safety-approved and final-tested using a DC dielectric

strength test. Please consult factory before performing an AC dielectric strength test.

10.

Remote-Sense terminals may be used to compensate for cable losses up to 250mV

(single output models only). The use of a twisted pair, decoupling capacitors and an

appropriately-rated low-impedance capacitor connected across the load will increase

noise immunity.

11.

Maximum screw penetration into bottom chassis mounting holes is 0.100 inches.

Maximum screw penetration into side chassis mounting holes is 0.250 inches.

12.

To comply with emissions specifications, all four mounting hole pads must be electrically

connected to a common metal chassis. Chassis/Cover option is recommended. Refer to

Operating Instructions for additional information.

13.

Common RF shielding precautions may need to be taken to assure emissions

compliance. Refer to Operating Instructions for additional information.

14.

Power-Fail (AC-Good) feature provides a logic-low warning signal from an open collector

transistor output 10ms prior to loss of output from AC failure, 5V/10mA.

15.

300LFM minimum of airflow must be maintained one inch above all points of top-side

components or cover when forced-air cooling is required.

16.

Total power must not exceed 50W with convection cooling on open-frame models.

17.

Total power must not exceed 70W with 300LFM forced-air cooling on open-frame models.

18.

Total power must not exceed 40W with convection cooling and Chassis/Cover option.

19.

Total power must not exceed 70W with 300LFM forced-air cooling and Chassis/Cover

option.

20.

Rated 10A with convection cooling.

21.

Rated 1.5A with convection cooling.

MAXIMUM OUTPUT POWER vs. AMBIENT TEMPERATURE

CONNECTOR SPECIFICATIONS

P1

AC Input

0.156 friction lock header mates with Tyco 640250-3 or

equivalent crimp terminal housing with Tyco 3-640706-1 or

equivalent crimp terminal.

P2

DC Output

(Single)

0.156 friction lock header mates with Tyco 770849-8 or

equivalent crimp terminal housing with Tyco 3-640707-1 or

equivalent crimp terminal.

P2

DC Output

(Multiple)

0.156 friction lock header mates with Tyco 770849-8 or

equivalent crimp terminal housing with Tyco 3-640707-1 or

equivalent crimp terminal.

G

Ground

0.187 quick disconnect terminal.

P3

P.F./Sense

(Single)

0.100 breakaway header mates with Molex 22-55-2061 or

equivalent crimp terminal housing with Molex type 71851 or

equivalent crimp terminal.

P3

Power Fail

(Multiple)

0.100 breakaway header mates with Molex 50-57-9002 or

equivalent crimp terminal housing with Molex type 71851 or

equivalent crimp terminal.

INTEGRATED

POWER DESIGNS 300 Stewart Road ■ Wilkes-Barre, PA 18706 ■ Phone: (570) 824-4666 ■ Fax: (570) 824-4843 ■ Email: sales@ipdpower.com ■ Web: www.ipdpower.com