Dependency of output voltage on output current
Ia
(mA)
12
10
8
6
4
2
0
0
1.5
0.5
2.5
3.5
4.5
1.0
2.0
3.0
4.0
Ua
(V)
Load resistance diagram
4...20 mA
SUPPLY VOLTAGE :
For operating voltage reverse polarity protection, a one-way rectifier or
reverse polarity protection diode is integrated in this device variant.
This internal one-way rectifier also allows operating 0 - 10 V devices on AC
supply voltage.
The output signal is to be tapped by a measuring instrument. Output
voltage is measured her against zero potential (O V) of the input voltage!
When this device is operated on
DC supply voltage
, the operating voltage
input UB+ is to be used for 15...36 V DC supply and UB – or GND for
ground wire!
When several devices are supplied by one 24 V
AC voltage supply
, it is to
be ensured that all ”positive“ operating voltage input terminals (+) of the
field devices are connected with each other and all ”negative“ operating
voltage input terminals (–) (= reference potential) are connected together
(in-phase connection of field devices). All outputs of field devices must be
referenced to the same potential!
In case of reversed polarity at one field device, a supply voltage short-
circuit would be caused by that device. The consequential short-circuit
current flowing through this field device may cause damage to it.
Therefore, pay attention to correct wiring!
Display and internal diagnostics
Measuring range
exceeded
Standard
Measuring range
not reached
Sensor
breakage
Sensor
short circuit
800
700
600
500
400
300
250
50
200
10
15
20
25
30 35 36 40
Load resistance diagram
W
orking r
esis
tanc
e (Ohm)
Operating voltage (V DC)
Admissible
range
Connecting scheme
Parallel operation
Circuitry
Circuitry
0...10V
0V/GND
0...10V
0V/GND
Power supply
AC 24V~
0V
DC 15-36V = GND
TEMPERATURE RANGES:
When selecting measuring transducer ranges,
it is necessary to ensure that the maximum temperatures
permissible for sensor ⁄ housing are not exceeded !
Ambient temperature for measuring transducers:
– 30 ...+ 70 °C
Apparent ohmic resistance = see load resistance diagram
Connecting scheme
Individual operation
Circuitry
0...10V
0V/GND
V
Power supply
AC 24V~
0V
DC 15-36V = GND
G
Measuring transducers, calibrateable, with active output
