KROHNE OPTIWAVE 7300 C Handbook page 91

OPTIWAVE 7300 C
How to connect the electrical cables
INFORMATION!
Cable entries are supplied on customer demand. If you supply the cable entries, this part must
have a degree of ingress protection IP≥6x (EN 60529).
• Use only flameproof and EEx d-approved cable entries and plugs.
• If you use only one cable entry, seal the other one with an EEx d-approved plug.
• All EEx d-approved installations must agree with European standards EN 50018.
Conduit entries
• Connect the instrument to an EEx d-approved conduit system.
• Install the applicable EEx d-approved sealing device. For further information, refer to
European Standard EN 50018.
• If you use only one cable entry, seal the other one with an EEx d-approved plug.
Load resistor
• Connect the load resistor to the positive terminal of the power supply.
• Ground the negative connection.
• If the load resistor has to be connected to the negative terminal, the loop resistance must not
be more than 250 ohms.
CAUTION!
Do not ground the positive connection.
Supply voltage
for an output of 22 mA
1
use a second power supply. This power supply energizes terminal 2 only.
2
01/2008 • 4000172401 - HB OPTIWAVE 7300 R03 en
ATEX: SUPPLEMENTARY INSTRUCTIONS
Terminal Minimum voltage at terminal [VDC] Maximum voltage at terminal [VDC]
1 (U )
S1
2 (U )
2
S2
20
10
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1
1
7
36
1
30
1
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