KROHNE MFC 400 EN - Manual (Page 50)

4
ELECTRICAL CONNECTIONS
50
MFC 400
www.krohne.com 08/2013 - 4002075802 - MA MFC 400 R02 en
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.
CAUTION!
Observe connection polarity.
Figure 4-21: Control input active C
N
to NAMUR EN 60947-5-6
.book Page 50 Monday, August 26, 2013 9:05 AM