Rockwell Automation 1769-PB4 Compact I/O Expansion Power Supplies - Manuel (Page 25)

Compact I/O Expansion Power Supplies 25
Publication 1769-IN028B-EN-P - October 2008
Temperature Derating
The following graphs indicate how much current can be drawn from the power supply at the
indicated case temperature without damaging it.
1769-PA2 Output Derating
0.875
+5V Bus Load (Amp
s)
With User +24V Current Draw at 0 Amps
+24V Bus Load (Amps)
2.0
1.0
0.5
0.0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
1.4
60 °C
55 °C
1.5
0.0
44726
With User +24V Current Draw at 0.2 Amps
+24V Bus Load (Amps)
+5V
Bus L
oad (Amps)
2.0
1.5
1.0
0.5
0.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
0.675 0.85
1.25
0.45
55 °C
60 °C
44727