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 1
st
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
