KROHNE OPTISONIC 3400 EN - Manual (Page 41)

ELECTRICAL CONNECTIONS
4
41
OPTISONIC 3400
www.krohne.com 11/2013 - 4002037702 - HB OPTISONIC 3400 -en-R02
4.7.3 Basic inputs/outputs
Current output active (HART ® ), basic I/Os
• U
int, nom
= 24 VDC nominal
• I ≤ 22 mA
• R
L
≤ 1 kΩ
Current output passive (HART ® ), basic I/Os
• U
int, nom
= 24 VDC nominal
• U
ext
≤ 32 VDC
• I ≤ 22 mA
• U
0
≥ 1.8 V
• R
L
≤ (U
ext
- U
0
) / I
max
CAUTION!
Observe connection polarity.
INFORMATION!
For further information refer to Description of the inputs and outputs on page 35
and refer to
HART ® connection on page 53 .
Figure 4-7: Current output active I
a
Figure 4-8: Current output passive I
p