WIKA T12 - Handbuch (Seite 31)

GB
3211517.07
07/2010
GB/D
WIKA operating instructions temperature transmitter T12 31
Following have an outward effect at the connection terminals
⊕
and
⊖
of the transmitter:
effective internal capacity C
i
= 25 nF
effective internal inductivity L
i
= 650 µH
Sensor connection (terminal 1 to 4)
The connected sensor must not warm up inadmissably according to
the temperature class of the respective hazardous area for the follow-
ing values for voltage, current and power.
Model T12.x0.xx9
II 3G Ex nL
II 3G Ex nA
II 3G Ex ic
effective values during operation
U
0
= DC 5 V
I
0
= 0.25 mA
The sum of the values of the connected sensor and the connection
line must not exceed the following values for the maximum permissib-
le capacity and inductivity:
Model T12.xx.xx2
II 1G EEx ia Groupe IIB
C
sensor
+ C
line
< C
O
C
O
= 11 µF
L
sensor
+ L
line
< L
O
L
O
= 8.6 mH
Model T12.xx.xx2
II 1G EEx ia Groupe IIC
C
sensor
+ C
line
< C
O
C
O
= 1.5 µF
L
sensor
+ L
line
< L
O
L
O
= 8.6 mH
Model T12.x0.xx9
II 3G Ex ic Groupe IIC
C
sensor
+ C
line
< C
O
C
O
= 1000 µF
L
sensor
+ L
line
< L
O
L
O
= 1000 mH
Connected thermocouples or mV-Sensors must not exceed following
values:
voltage Ui = DC 1.2 V
effective internal capacity Ci = negligable
effective internal inductivity Li = negligable
8. Notes for mounting and operating in ...