KROHNE OPTISONIC 3400 EN - Manual (Page 44)

4
ELECTRICAL CONNECTIONS
44
OPTISONIC 3400
www.krohne.com 11/2013 - 4002037702 - HB OPTISONIC 3400 -en-R02
4.7.4 Modular inputs/outputs and bus systems
Current output active (only current output terminals C/C- have HART ® capability),
modular I/Os
• U
int, nom
= 24 VDC
• I ≤ 22 mA
• R
L
≤ 1 kΩ
• X designates the connection terminals A, B or C, depending on the version of the signal
converter.
Current output passive (only current output terminals C/C- have HART ® capability),
modular I/Os
• U
ext
≤ 32 VDC
• I ≤ 22 mA
• U
0
≥ 1.8 V
• R
L, max
= (U
ext
- U
0
) / I
max
• X designates the connection terminals A, B or C, depending on the version of the signal
converter.
CAUTION!
Observe connection polarity.
INFORMATION!
• For further information on electrical connection refer to Description of the inputs and outputs
on page 35
.
• For the electrical connection of bus systems, please refer to the separate documentation for
the respective bus systems.
INFORMATION!
• For frequencies above 100 Hz, shielded cables are to be used in order to reduce effects 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.
• Any connection polarity.
Figure 4-12: Current output active I
a