KROHNE MFC 300 EN - Manual (Page 60)

4
ELECTRICAL CONNECTIONS
60
MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 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
• Switching point for identifying "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
• Switching point for identifying "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 4-26: Control input passive C
p
1 Signal
.book Page 60 Monday, February 6, 2012 11:01 AM