ELECTRICAL CONNECTIONS
4
51
OPTIFLEX 1300 C
www.krohne.com
01/2008 • 4000172301 - HB OPTIFLEX 1300 R02 en
4.3 Electrical connection for current output
4.3.1 Non-Ex
4.3.2 Ex i
Figure 4-2:
Electrical connections for non-Ex instruments
1
Power supply
2
Resistor for HART
®
communication
3
14...30 VDC for an output of 22mA at the terminal
4
10...30 VDC for an output of 22mA at the terminal
2
3
4
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...30 VDC for an output of 22mA at the terminal
6
10...30 VDC for an output of 22mA at the terminal
=
=
3
Ex i
HB_OPTIFLEX1300_EN_D4_080428.book Page 51 Tuesday, April 29, 2008 2:47 PM