ELECTRICAL CONNECTIONS
4
69
IFC 300
www.krohne.com
06/2009 - 4000069802 - MA IFC 300 R03 en
Pulse/frequency output active, modular I/Os
•
U
nom
= 24 VDC
•
f
max
in operating menu set to f
max
≤
100 Hz:
I
≤
20 mA
open:
I
≤
0.05 mA
closed:
U
0,nom
= 24 V at I = 20 mA
•
f
max
in the operating menu set to 100 Hz < f
max
≤
10 kHz:
I
≤
20 mA
open:
I
≤
0.05 mA
closed:
U
0, nom
= 22.5 V at I = 1 mA
U
0, nom
= 21.5 V at I = 10 mA
U
0, nom
= 19 V at I = 20 mA
•
If the following maximum load resistance R
L, max
is exceeded, the load resistance R
L
must be
reduced accordingly by parallel connection of R:
f
≤
100 Hz: R
L, max
= 47 k
Ω
f
≤
1 kHz: R
L, max
= 10 k
Ω
f
≤
10 kHz: R
L, max
= 1 k
Ω
•
The minimum load resistance R
L, min
is calculated as follows:
R
L, min
= (U
ext
- U
0
) / I
max
•
X designates the connection terminals A, B or D, depending on the version of the signal
converter.
INFORMATION!
•
For frequencies above 100 Hz, shielded cables are to be used in order to reduce radiation
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.
Wall-mounted version:
Wall-mounted version:
Wall-mounted version:
Wall-mounted version: Shield connected using 6.3 mm / 0.25" push-on connectors
(insulation to DIN 46245) in the terminal compartment.
•
Any connection polarity.
Figure 4-32: Pulse / frequency output active P
a
.book Page 69 Wednesday, June 10, 2009 4:20 PM
