DF47
Intrinsic Safety Barrier for Fieldbus

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;

Some Characteristics: