Non-Ex; Ex I - KROHNE OPTIWAVE 7300 C Handbook

ELECTRICAL CONNECTIONS
4

4.2.1 Non-Ex

Electrical connections for non-Ex instruments
Figure 4-2:
Power supply
1
Resistor for HART
2
14...30 VDC for an output of 22mA at the terminal
3
10...30 VDC for an output of 22mA at the terminal
4

4.2.2 Ex i

HART
Figure 4-3:
Intrinsically-safe power supply
1
Zone non-Ex
2
Zone Ex
3
Resistor for HART
4
5 14...30 VDC for an output of 22mA at the terminal
6 10...30 VDC for an output of 22mA at the terminal
36
®
communication
=
=
®
connection to the Ex i circuit with a resistor
®
communication
2
3
Ex i
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