Phoenix Contact IB IL AO 4/U/0-10-ECO Handleiding (190 Pagina's)

Handleiding

Je bekijkt pagina 174 van 190

IL SYS INST UM E

174 / 188 Phoenix Contact

6452_en_11

A 6.2 Power dissipation of the housing within the operating

temperature range depending on the ambient temperature

This calculation is illustrated using the IB IL 24 DO 2-2A-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.

Where

If no output is set, the component with the sigma sign is omitted.

Example: Both outputs are enabled and operating at full load. The load currents of the outputs are

I

L1

= I

L2

= 2 A.

Power dissipation of the

electronics

According to the formula, the electronics of this specific configuration has the following

power dissipation:

P

TOT

= 0.18 W + 2 x [0.20 W + (2 A)

2

x 0.10 ]

P

TOT

= 0.18 W + 2 x 0.6 W

P

TOT

= 0.18 W + 1.20 W

P

TOT

= 1.38 W

Power dissipation of the

housing

The value for the power dissipation of the housing is specified in every terminal-specific

data sheet.

The permissible power dissipation of the housing for the IB IL 24 DO 2-2A-PAC terminal

depends on the temperature.

Where

At an ambient temperature of up to -5°C, you can load the housing with the maximum

power dissipation.

P

TOT

Total power dissipation of the electronics

i Index

n Number of set outputs (n = 1 to 2)

I

Li

Load current of output i

i=1

n

P

TOT

= 0.18 W + ∑ (0.20 W + I

Li

2

x 0.10 Ω)

P

HOU

= 2.4 W -25°C < T

A

 -5°C

P

HOU

= 2.4 W - [(T

A

- (-5°C))/37.5°C/W] -5°C < T

A

 +55°C

P

HOU

Power dissipation of the housing

T

A

Ambient temperature

Bekijk gratis de handleiding van Phoenix Contact IB IL AO 4/U/0-10-ECO, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.