4
ELECTRICAL CONNECTIONS
74
IFC 300
www.krohne.com
06/2009 - 4000069802 - MA IFC 300 R03 en
Control input active, modular I/Os
•
U
int
= 24 VDC
•
External contact open:
U
0,nom
= 22 V
External contact closed:
I
nom
= 4 mA
•
Set switching point for detection "Contact open or closed:
Contact open (off): U
0
≤
10 V with I
nom
= 1.9 mA
Contact closed (on): U
0
≥
12 V with I
nom
= 1.9 mA
•
X designates the connection terminals A or B, depending on the version of the signal
converter.
Control input passive, modular I/Os
•
3 V
≤
U
ext
≤
32 VDC
•
I
max
= 9.5 mA at U
ext
≤
24 V
I
max
= 9.5 mA at U
ext
≤
32 V
•
Set switching point for detection "Contact open or closed:
Contact open (off): U
0
≤
2.5 V with I
nom
= 1.9 mA
Contact closed (on): U
0
≥
3 V with I
nom
= 1.9 mA
•
X designates the connection terminals A or B, depending on the version of the signal
converter.
CAUTION!
Observe connection polarity.
Figure 4-38: Control input active C
a
1
Signal
Figure 4-39: Control input passive C
p
1
Signal
.book Page 74 Wednesday, June 10, 2009 4:20 PM
