Input: Current = 0 ...20mA , 4 ... 20mA or Voltage = 0 ... 10V 4 port galvanic isolation Isolation test voltage up to 1.5kV (power supply against input), 2.5kV (outputs against input/power supply) Working voltage up to 300V AC/DC Universal power supply 24VDC.
The VariTrans® A 20300 signal doubler is an extremely compact product which allows cost-efficient solutions. Using this unit, input, both outputs and power supply are decoupled from one another (4-port isolation).
Measuring only 6 mm, the ultra-slim, 8-pin modular housing of the VariTrans® A 20300 takes up only a little space on the top-hat rail and, if necessary, can be installed at a later date.
In addition to “doubling” the analog signal, the VariTrans® A 20300 can also convert signals if required. For example, if the signal source has only one voltage output but the installation uses current signals, the signal doubler converts the voltage signal (0 … 10 V) proportionally into the required current signals (0 ... 20 mA or 4 ... 20 mA). An adjustment from “Dead Zero“ (0 ... 20 mA) to “Live Zero“ (4 ... 20 mA ) is also possible. The corresponding input and output signals are calibrated and can be selected using DIP switches with the two outputs being switched over together.
The VariTrans® A 20300 may also be used when a particularly high output load is required. Standard-signal sources can often drive a load of up to 500 ohms, i. e. supply 10 V at 20 mA. Sometimes certain devices – e. g. actuators – require a higher voltage, i. e. their input resistance is higher. Likewise in this case, the signal doubler can solve the problem: both output signals are now not used separately but are connected in series to form one signal. The available voltage is then doubled allowing an increased load up to 1000 ohms (20 V at 20 mA). Of course, the current which determines the 0/4 to 20 mA signal is not changed.