Honeywell Fema DCM-203-574 Series Assembly And Operating Instructions Manual page 72

7. Pressure Switches in Intrinsically Safe Circuits (Ex-i)
Wiring parameters for use in intrinsically safe
electrical circuits
U 14 VDC
i
R 1.5 kOhm
i
L 100 µH
i
C 1 nF
i
Type of Ex-protection
Gas: II 1/2G Ex ia IIC T6 Ga/Gb
Dust: II 1/2D Ex ia IIIC T80°C Da/Db
Approvals
ATEX: IBExU12ATEX1040
IECEx: IECEx IBE 14.0077
CAUTION:
Never operate pressure switches with
resistor-combinations without suitable
switching amplifier. Device can overheat
and burn caused by overload of resistor
combination.
32 MU2B-0238GE51 R0616D