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 DF47-12
Intrinsic Safety Barrier for Foundation Fieldbus & Profibus PA (1.2W)
The Intrinsically Safe technology incorporated in the
DF47 totally isolates the control network on the hazardous side of the
barrier. It also supplies up to 100 mA to field devices located in hazardous
area.
The I.S. values of the power supply are designed for
fieldbus devices, which are in accordance with the FISCO model. The incorporation
of a fieldbus repeater in accordance with IEC 1158-2, 31.25 kbits/s essentially
clean and boost the incoming communication signal transmitting it to hazardous
environment without compromising the safety requirements of explosion
proof wiring.
The networks of the hazardous and safe sides of the
DF 47 are completely independent of each other. In addition the bus termination
for the hazardous network is incorporated into the DF 47, which means
that only a single far terminator is required.
- H1 Isolated Barrier and I.S. Power Supply in accordance with the FISCO
Model;
- Built-in H1 Fieldbus Signal Repeater;
- Provides up to 100 mA at 14 V to the hazardous network (for field
devices);
- Conforms to the IEC 1158-2, 31.25 kbits/s standard for fieldbus. (Foundation
Fieldbus and PROFIBUS PA);
- FM & CENELEC Intrinsic Safety standards certified;
- Based on PTB Report W-53, “Investigations into Intrinsic Safety
of Fieldbus Systems”;
- Bus termination on hazardous side;
- Installation can be done in safe area, Div. 2/Zone 2 or Div. 1/ Zone
1;
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