2726188 Phoenix Contact, 2726188 Datasheet - Page 157

• Manufacturer Part Number: 2726188
• Description: INTERBUS Bus Coupler
• Manufacturer: Phoenix Contact

Example:
Power dissipation of the
electronics
6452_en_02
A 5
A 5.1
This calculation is illustrated using the IB IL 24 DO 8-PAC terminal as an example.
Formula to calculate the power dissipation of the electronics
This formula is terminal-specific and is provided in every data sheet.
P
Where
Load currents of the outputs:
I
Outputs 7 and 8 are not used.
According to the formula, the electronics of this specific configuration has the following
power dissipation:
L1
P
i
n
I
If no output is set, the component with the sigma sign is omitted.
P
P
P
TOT
Li
TOT
TOT
TOT
TOT
= 0.5 A, I
= 0.19 W +
= 0.19 W + [0.1 W + (0.5 A)
= 0.19 W + 0.200 W + 0.164 W + 0.116 W
= 1.37 W
Calculation examples for power dissipation and
working points
L2
Constant power dissipation of the housing over the
operating temperature range
= 0.4 A, I
i = 1
Total power dissipation in the module
Index
Number of set outputs (n = 1 to 8)
Load current of output i
∑
n
+ [0.1 W + (0.4 A)
+ [0.1 W + (0.2 A)
+ [0.1 W + (0.5 A)
+ [0.1 W + (0.3 A)
+ [0.1 W + (0.4 A)
+ 0.200 W + 0.136 W + 0.164 W
(0.10 W + I
Calculation examples for power dissipation and working points
L3
= 0.2 A, I
Li
2
x 0.40
L4
2
2
2
2
2
2
x 0.4 Ω]
x 0.4 Ω]
x 0.4 Ω]
x 0.4 Ω]
x 0.4 Ω]
x 0.4 Ω]
= 0.5 A, I
Ω
)
L5
= 0.3 A, I
L6
= 0.4 A
PHOENIX CONTACT
A-7