Subject to change · V 2.02.20 · EN
Page 32
www.argo-hytos.com
13. Analog current output (4...20mA)
The ordinal numbers for the various standards are calculated according to the tables in chapter 13.
The load resistance cannot be chosen arbitrarily. It has to be adjusted according to the supply voltage. The maximal load resistance
can be calculated with the following formula:
R
max
/Ω =
Alternatively, the following table may be employed:
R
max
/Ω Supply voltage / V
250 9
400 12
1000 24
13.3 Configuration
The choice which ordinal number and which standard shall be given out through the analog output can be done in the menu of the
device under “CONFIG. ANALOG”.
13.4 Conversion of the analog current output to the ordinal number
The analog current output gives a signal from 4 to 20 mA. Below, the conversions to the respective ordinal number are described.
l/mA ISO 4406:17 SAE AS 4059E
4 0 000
12 13 5
20 26 12
Pin 6 Pin 8
A
Pin 6 Pin 8
V
U / V - 2V
20mA
- 100 Ω
Fig. 19: Measurement of the current without load resistance
Fig. 20: Measurement of the current with load resistance
Table 15: Maximum load resistance
Table 16: Comparison table current output to ordinal number ISO and SAE
13.1 Measurement without load resistance
The measurement of the current should be carried out with a suitable ammeter.
The ordinal numbers for the various standards are calculated according to the tables in chapter 13.
13.2 Measurement with load resistance
The measurement of the voltage should be carried out with a suitable voltmeter.
To Next Page
Loading...