Home > Voltage/Current Signal Splitter

Voltage/Current Signal Splitter

Editorial
article image

Control loops in process industries often require an analog standard signal to be processed at two different points, with both devices needing to receive the same signal. 

To prevent falsified signals without any interference, it is very necessary to galvanically isolate these signals. 

The VariTrans A 20300 signal splitter is an ideal cost-effective solution to the problem. Its input, both outputs, and power supply are decoupled from one another offering 4-Port Isolation.

These features allow ALVI to provide end users with a comprehensive measurement solution in a single device, for a fraction of the typical cost of two conventional isolators.

The VariTrans A 20300 signal splitter also feature highly compact housings, measuring just 6 mm wide. They also feature protective separation, for personal protection according to EN61140.

In addition to “doubling” the analog signal, the VariTrans A 20300 can also convert signals if required. If, for example, the signal source only has a voltage output but current signals are used in the system, then the signal doubler converts the voltage signal (0 … 10 V) proportionally into the required current signals (0 … 20 mA or 4 … 20 mA). Conversion 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.

The VariTrans A 20300 can 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. The signal doubler can also solve this problem: Both output signals are not used separately in this case, but are connected in series to form one signal. This doubles the available voltage, making it possible to drive a higher load of up to 1000 ohms (20 V at 20 mA).

Typical applications include utility energy custody transfer on grid or pipeline; and data recording devices used in conjunction with PLC or DCS for real-time adjustments and historical data recording.

For further information, please visit: http://www.alvi.com.au/wp-content/product-pdf/KAT_EN_A20300.pdf

Newsletter sign-up

The latest products and news delivered to your inbox