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

Handleiding

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Temperature response of the terminals

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A 5 Temperature response of the terminals

Please note that derating or simultaneity limitations must be taken into consideration de-

pending on the ambient temperature. Notes on this are provided in the terminal-specific

data sheets. The terms used in the data sheets are explained below:

Power dissipation of the

electronics (P

TOT

)

The power dissipation of the electronics of a terminal is calculated according to the for-

mula provided in the terminal-specific data sheet. The calculated value must not exceed

the power dissipation of the housing.

Power dissipation of the

housing (P

HOU

)

The power dissipation of the housing indicates the maximum power dissipation. The

maximum power dissipation is specified in the terminal-specific data sheet.

In the permissible operating temperature range, the power dissipation of the housing can

be dependent on or independent of the ambient temperature.

If the power dissipation of the housing depends on the ambient temperature, a permissi-

ble working point must be defined.

Permissible working point Depending on the power dissipation of the housing and the power dissipation of the elec-

tronics at a certain current, the maximum temperature at which the terminal can be op-

erated with this current can be calculated.

Examples Examples for calculating these values can be found in the section below.

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