Microsensor MDM490 Operation Manual page 9

△P
≤35kPa Explosion proof grade
and parameter of transmitter：
ExiaⅡBT6 Ga
U =28VDC I =93mADC
i i
Li≈0.1mH C ≈0.29μF P
i
＞35kPa Explosion proof grade
and parameter of transmitter：
ExiaⅡCT6
U =28VDC I =93mADC
i i
Li≈0.1mH C ≈0.044μF P
i
The maximum diffused capacities of cables between transmitter and safe barrier
is C -C ，the maximum diffused inductance is L
=C
p o i
The safe barrier is purchased by customers, as long as the coefficients match the
requirements above and own the explosion proof certificate.
Safe barrier's installation and operation should see safe barrier operation menu.
When the product is operated in "Zero"area, the excitation transformer
supplied to safe barrier should conform No. 8.1 requirements of
I
Fig. 7
=0.65W
i
=0.65W
i
safe
barrier
Load
Explosion proof grade and
parameter of safety fence
ExiaⅡC
U =28VDC I
o
P =0.65W
o
Explosion proof grade and
parameter of safety fence
U =28VDC I
o
P =0.65W
o
=L
C o
8
C
=93mADC
o
ExiaⅡC
=93mADC
o
-L .
i
Supply
24VD