Endress+Hauser NRF81 - Page 27

Tankside Monitor NRF81 Electrical connection
Endress+Hauser 27
6.1.6 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
1 3
2
2 4
HR
CDI
WP
on
SIM
i
D
C
B
A
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
G
1
3
2
POWER
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
"Operating mode" = "4..20mA input" or "HART master+4..20mA input"
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
a
+
–
!
E
G
F
1
1
1 3
2
2 4
HR
CDI
WP
on
SIM
i
D
C
B
A
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
G
1
3
2
POWER
b
A0027933
 9 Passive usage of the Analog I/O module in the input mode
a Power supply
b External device with 4...20mA and/or HART signal output