Endress+Hauser NRF81 - Page 20

Electrical connection Tankside Monitor NRF81
20 Endress+Hauser
Connection of the "Analog I/O" module for passive usage
• In the passive usage the supply voltage for the communication line must be supplied by
an external source.
• The wiring must be in accordance with the intended operating mode of the Analog I/O
module; see the drawings below.
"Operating mode" = "4..20mA output" or "HART slave +4..20mA output"
D
E
F
C
B
A
1
1
1
1 3
2
2 4
1
HR
CDI
WP
on
SIM
2
2
3
3
4
4
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
i
G
1
3
2
POWER
ca
b
-
+
!
E
G
F
1
1 3
2
2 4
HR
CDI
on
i
C
B
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
G
1
3
2
A0027931
 8 Passive usage of the Analog I/O module in the output mode
a Power supply
b HART signal output
c Analog signal evaluation