Rockwell Automation 1747-L5xx SLC 500 Modular Hardware Style User Manual - Manual (Page 266)

Publication 1747-UM011G-EN-P - June 2008
266 Calculating Heat Dissipation for the SLC 500 Control System
Power Supply Heat Dissipation Graphs
Use the graphs below for determining the power supply dissipation in
step 2 of the Example Worksheet for Calculating Heat Dissipation.
1746-P2 Power Supply Change in Power
Dissipation due to Output Loading
1746-P1 Power Supply Change in Power
Dissipation due to Output Loading
1746-P3 Power Supply Change in Power
Dissipation due to Output Loading
1746-P4 Power Supply Change in Power
Dissipation due to Output Loading
Power Supply Loading (Watts)
Power Supply Loading (Watts) Power Supply Loading (Watts)
Power Supply Loading (Watts)
1746-P5 Power Supply Change in Power
Dissipation due to Output Loading
Power
Supply Dissipa
tion
(W
at
ts
)
Po
we
r Supply Dissipa
tion
(W
atts)
Power Supply
Diss
ipation (W
atts)
Power Supply
Diss
ipation (W
atts)
Power
Supply Dissipa
tion
(W
at
ts
)
Power Sup
ply Dissipation (W
atts)
Power Supply Loading (Watts) Power Supply Loading (Watts)
1746-P6 Power Supply Change in Power
Dissipation due to Output Loading
1746-P7 Power Supply Change in Power
Dissipation due to Output Loading
Power Supply Loading (Watts)
20
18
16
0
14
12
10
8
6
4
2
0 5 10 15 20 25
30
0 10 20 30 40 50 60
0 5 10 15 20 25 35
0 10 20 30 40 50 60
0 10 20 30 40 50 60
0 10 20 30 40 50 60
0 20 40 60 80 100
70 80
20
18
16
0
14
12
10
8
6
4
2
20
18
16
0
14
12
10
8
6
4
2
20
18
16
0
14
12
10
8
6
4
2
25
20
15
10
5
0
25
20
15
10
5
0
25
20
15
10
5
0
Power Sup
ply Dissipation (W
atts)
Po
wer Supp
ly Dissipation
(W
atts)
Po
wer Supp
ly
Dissipatio
n (W
atts)
24V input
12V input