KROHNE BM 702 A EN - Manual (Page 30)

4
ELECTRICAL CONNECTIONS
30
BM 702 A
www.krohne.com 09/2009 - 4000643301 - MA BM 702 A R01 en
4.2.2 Non-Ex
4.2.3 Ex i
Figure 4-2: Electrical connections for non-Ex devices
1 Power supply
2 Resistor for HART
® communication
3 14.5...30 VDC for an output of 22 mA at the terminal
Figure 4-3: HART ® connection to the Ex i circuit with a resistor
1 Intrinsically-safe power supply
2 Zone non-Ex
3 Zone Ex
4 Resistor for HART
® communication
5 14.5...30 VDC for an output of 22 mA at the terminal
INFORMATION!
If the barrier has a HART
® terminal, you can connect HART ® devices directly to the barrier
without a resistor.
Figure 4-4: HART ® connection to the Ex i barrier without a resistor
1 Intrinsically-safe power supply
2 Zone non-Ex
3 Zone Ex
4 14.5...30 VDC for an output of 22 mA at the terminal
.book Page 30 Thursday, September 3, 2009 2:53 PM