8
c) Intrinsic safe version transmitter is used for explosive gas
environment, please connect transmitter with safe barrier to
establish intrinsic safe ex-proof system;
d) Safe barrier should comply with intrinsic safe ex-proof parameter,
and owning Ex-proof Qualified Certificate;
Safe barrier and power should be put in safe area; intrinsic safe
version transmitter should be put in dangerous area. Please see
Fig.5 and Fig.6:
P
I
Dangerous Area
+V
OV
Safe
Barrier
Load
Power
24VDC
+
-
Safe Area
P
Input
Fig. 5
ExiaIICT6Ga [Exia]IIC
Transmitter ex-proof parameter: Safe barrier ex-proof parameter:
U
i
=28VDC I
i
=93/115mADC(ATEX) U
o
=28VDC
L
i
=0mH C
i
=0.042/0.055μF(ATEX) I
o
=93/115mA DC (ATEX)
P
i
=0.65/0.66W(ATEX) P
o
=0.65/0.66W(ATEX)
ATEX(3-wire):
Dangerous Area Safe Area
