WIKA T15 - Page 28

EN
14139245.01 12/2015 EN/DE
WIKA operating instructions model T1528
10.1 Safety-related characteristic values for models T15.x-AI, T15.x-AC
Intrinsically safe connection values for the current loop (4 ... 20 mA)
Level of protection Ex ia IIC/IIB/IIA, Ex ia IIIC or Ex ic IIC/IIB/IIA
Parameters Models T15.x-AI, T15.x-AC Model T15.x-AI
Gas hazardous application Dust hazardous
application
Terminals + / - + / -
Voltage U
i
DC 30 V DC 30 V
Current l
i
130 mA 130 mA
Power P
i
800 mW 750/650/550 mW
Effective internal capacitance C
i
18.4 nF 18.4 nF
Effective internal inductance L
i
20 µH 20 µH
Sensor circuit
Parameters Model T15.x-AI Model T15.x-AC
Ex ia IIC/IIB//IIA
Ex ia IIIC
Ex ic IIC/IIB//IIA
Terminals 1 - 4 1 - 4
Voltage U
o
DC 30 V DC 30 V
Current I
o
6.1 mA 6.1 mA
Power P
o
46 mW 46 mW
Max. external
capacitance C
o
IIC 30 nF
1)
180 nF
1)
IIB IIIC 0.520 µF
1)
1.37 µF
1)
IIA 1.70 µF
1)
5.40 µF
1)
Max. external
inductance L
o
IIC 1 mH 2 mH
IIB IIIC 1 mH 2 mH
IIA 1 mH 2 mH
Characteristics Linear
Notes:
U
o
: Maximum voltage of any conductor against the other three conductors
I
o
: Maximum output current for the least favourable connection of the internal current limiting resistors
P
o
: U
o
x I
o
divided by 4 (linear characteristic)
1) Internal L and C is already taken into account
Due to separation requirements of the applied standards, IS supply- and signal-circuit and
the IS sensor circuit shall be considered as being galvanically connected to each other.
The electrical parameters of the head and rail mounting versions are identical.
10. Specifications