Engineering; Max. Ambient Temperatures; Power Dissipation - Siemens SITRANS I100 7NG4124-0AA00 Operating Instruction

5 Engineering

5.1 Max. ambient temperatures

The SITRANS I100 isolators can be used over a wide temperature range. Depending on
the isolator version and installation method different maximum ambient temperatures may
result.
Ventilation:
Installation:
Orientation:
Type:
SITRANS I100
Ventilation:
Installation:
Orientation:
Type:
SITRANS I100

5.2 Power dissipation

Data sheets are describing the maximum power dissipation in standard operation (output
20 mA; power supply 24 V DC; load = 250 Ω). In practice not all isolators are working with
full load. Therefore engineering is done typically with an average power dissipation of 70 %
(P ).
70%
Type
SITRANS I100
without ventilation
Single unit
any vertical
70 ° C
60 ° C
with ventilation
Single unit
any vertical
70 ° C
70 ° C
max. power dissipation
1.5 W
DIN-rail
horizontal
65 ° C
DIN-rail
horizontal
70 ° C
70 % power dissipation
1.1 W
Operating instruction A5E02591611-02
english
SITRANS I100
13