Reference Manual Instruction Manual

All parameters are specified at 24V, 2.5A, 230Vac input, 25°C ambient and after a 5 minutes run-in time, unless noted otherwise.
22 Rockwell Automation Publication 1606-RM007A-EN-P - February 2014
Bulletin 1606 Switched Mode Power Supplies
22.12. Use in a Tightly-Sealed Enclosure
When the power supply is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher
than outside. In such situations, the inside temperature denes the ambient temperature for the power supply.
The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure.
The power supply is placed in the middle of the box; no other heat producing item is inside the box.
Enclosure: Rittal Type IP66 Box PK 9510 100, plastic, 130x130x75mm
Input: 230Vac
Case A:
Load: 24V, 2.5A; load is placed outside the box
Temperature inside the box: 40.1°C (in the middle of the right side of the power supply with a distance of 1cm)
Temperature outside the box: 21.9°C
Temperature rise: 18.2K
Case B:
Load: 24V, 2.0A; (=80%) load is placed outside the box
Temperature inside the box: 38.4°C (in the middle of the right side of the power supply with a distance of 1cm)
Temperature outside the box: 22.0°C
Temperature rise: 16.4K