KROHNE OPTISONIC 7300 EN - Manual (Page 38)

4
ELECTRICAL CONNECTIONS
38
OPTISONIC 7300
www.krohne.com 09/2012 - 4001102303 - MA OPTISONIC 7300 R03 en
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.
Figure 4-6: Current output active I
a
Figure 4-7: Current output passive I
p