KROHNE OPTISONIC 3400 EN - Manual (Page 50)

4
ELECTRICAL CONNECTIONS
50
OPTISONIC 3400
www.krohne.com 11/2013 - 4002037702 - HB OPTISONIC 3400 -en-R02
Control input active C
N
NAMUR, modular I/Os
• Connection acc. to EN 60947-5-6
• Switching point for identifying "contact open or closed":
Contact open (off): U
0, nom
= 6.3 V with I
nom
< 1.9 mA
Contact closed (on): U
0, nom
= 6.3 V with I
nom
> 1.9 mA
• Detection of cable break:
U
0
≥ 8.1 V with I ≤ 0.1 mA
• Detection of cable short circuit:
U
0
≤ 1.2 V with I ≥ 6.7 mA
• X designates the connection terminals A or B, depending on the version of the signal
converter.
4.7.5 Ex i inputs/outputs
CAUTION!
Observe connection polarity.
Figure 4-22: Control input active C
N
to NAMUR EN 60947-5-6
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.
INFORMATION!
For further information on electrical connection refer to Description of the inputs and outputs on
page 35
.
INFORMATION!
• For frequencies above 100 Hz, shielded cables are to be used in order to reduce effects from
electrical interferences (EMC).
• Compact and field housing versions: Compact and field housing versions: Compact and field housing versions: Compact and field housing versions: Shield connected via the cable terminals in the terminal
compartment.
• Any connection polarity.