S+S Regeltechnik THERMASGARD RGTM1 Series, Инструкции по эксплуатации, монтажу и установке, Страница: 7 / 16

G
Measuring transducers, calibrateable, with active output
Load resistance diagram
4...20 mA
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)
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
TEMPERATURE RANGES:
When selecting measuring transducer ranges,
it is necessary to ensure that the maximum temperatures
permissible for sensor ⁄ enclosure are not exceeded !
Ambient temperature for measuring transducers:
– 30 ...+ 70 °C
Apparent ohmic resistance = see load resistance diagram
Connecting scheme Parallel operation
Connecting scheme Individual operation
Circuitry Circuitry
0...10V 0V/GND 0...10V 0V/GND
Power supply
AC 24V~ 0V
DC 15-36V = GND
Circuitry
0...10V 0V/GND
V
Power supply
AC 24V~ 0V
DC 15-36V = GND
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!