KROHNE MFC 400 EN - Manual (Page 45)

ELECTRICAL CONNECTIONS
4
45
MFC 400
www.krohne.com 08/2013 - 4002075802 - MA MFC 400 R02 en
Pulse/frequency output passive, modular I/Os
• U
ext
≤ 32 VDC
• f
max
in the operating menu set to f
max
≤ 100 Hz:
I ≤ 100 mA
open:
I ≤ 0.05 mA at U
ext
= 32 VDC
closed:
U
0, max
= 0.2 V at I ≤ 10 mA
U
0, max
= 2 V at I ≤ 100 mA
• f
max
in operating menu set to 100 Hz < f
max
≤ 10 kHz:
open:
I ≤ 0.05 mA at U
ext
= 32 VDC
closed:
U
0, max
= 1.5 V at I ≤ 1 mA
U
0, max
=2.5 V at I ≤ 10 mA
U
0, max
= 5 V at I ≤ 20 mA
• If the following maximum load impedance R
L, max
is exceeded, the load impedance R
L
must
be reduced accordingly by parallel connection of R:
f ≤ 100 Hz: R
L, max
= 47 kΩ
f ≤ 1 kHz: R
L, max
= 10 kΩ
f ≤ 10 kHz: R
L, max
= 1 kΩ
• The minimum load impedance R
L, min
is calculated as follows:
R
L, min
= (U
ext
- U
0
) / I
max
• Can also be set as status output; refer to status output connection diagram.
• X designates the connection terminals A, B or D, depending on the version of the signal
converter.
Figure 4-14: Pulse frequency output passive P
p
.book Page 45 Monday, August 26, 2013 9:05 AM