Endress+Hauser NRF81 - Page 75

Tankside Monitor NRF81 Commissioning
Endress+Hauser 75
9.2.13 Configuration of the 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
POWER
i
B
B1-3 B4-8
1 2 3 4 5 6 7 8
C
1 2 3
4 5 6 7 8
C1-3 C4-8
A0032464
 35 Possible locations of the Analog I/O modules, which can be used as a 4-20mA output. The order code of
the device determines which of these modules is actually present →  20.
Each Analog I/O module of the device can be configured as a 4...20mA analog output. To
do so, proceed as follows:
1. Navigate to: Setup → Advanced setup → Input/output → Analog I/O X1-3.
2. Go to the Operating mode parameter and select 4..20mA output or HART slave
+4..20mA output
3)
.
3. Go to the Analog input source parameter and select the tank variable which is to be
transmitted via the 4...20mA output.
4. Go to the 0 % value parameter and enter the value of the selected tank variable
which will be mapped to 4 mA.
5. Go to the 100 % value parameter and enter the value of the selected tank variable
which will be mapped to 20 mA.

0%
1
100%
4mA
2
20mA
I [mA]
A0032953
 36 Scaling of the tank variable to the output current
1 Tank variable
2 Output current
After startup of the device, as long as the assigned tank variable is not yet available,
the output current assumes the defined errror value.
The Analog I/O submenu contains more parameters which can be used for a more
detailed configuration of the analog output. For a description see →  138
3) "HART slave +4..20mA output " means that the Analog I/O module serves as a HART slave which cyclically sends up to four HART variables to a
HART master. For the configuration of the HART output: →  76