Phoenix Contact IB IL AO 4/U/0-10-ECO handleiding
Handleiding
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Calculation examples for power dissipation and working points
6452_en_11 Phoenix Contact 175 / 188
Permissible working point At an increased ambient temperature, you must calculate the permissible working point
for the calculated power dissipation.
To do this set P
TOT
= P
HOU
.
P
TOT
= 2.4 W - [(T
A
+ 5°C)/37.5°C/W]
After changing the formula, the maximum permissible ambient temperature, with this
load, is calculated as:
T
A
= (2.4 W - P
TOT
) x 37.5°C/W - 5°C
P
TOT
= 1.38 W (from the calculation for the power dissipation of the electronics)
T
A
= (2.4 W - 1.38 W) x 37.5°C/W - 5°C
T
A
= 1.02 W x 37.5°C/W - 5°C
T
A
= 33.25°C
With both outputs at full load, this terminal can be operated up to an ambient
temperature of 33°C.
If you never operate the outputs simultaneously and if a set output consumes a current
of 2 A, you can operate up to an ambient temperature of:
P
TOT
= 0.18 W + [0.20 W + (2 A)
2
x 0.10 ]
P
TOT
= 0.18 W + 0.60 W
P
TOT
= 0.78 W
T
A
= (2.4 W - P
TOT
) x 37.5°C/W - 5°C
P
TOT
= 0.78 W (from the calculation for the power dissipation of the electronics)
T
A
= (2.4 W - 0.78 W) x 37.5°C/W - 5°C
T
A
= 1.62 W x 37.5°C/W - 5°C
T
A
= 55.75°C
T
A
= 55°C (maximum permissible ambient temperature)
As the maximum permissible ambient temperature is 55°C, you can operate under the
conditions specified above in the entire permissible temperature range. This results
in a simultaneity of 50% at 55°C as specified in the data sheet.
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Productinformatie
| Merk | Phoenix Contact |
| Model | IB IL AO 4/U/0-10-ECO |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 18677 MB |
