Application Notes

EAP-031001

I want to convert the difference (absolute value) of two (2) signals A and B 4 - 20mA DC.

The connection depends on whether the signals are voltage or current.

Voltage signals (e.g. 0 - 10V DC)
Connect as in Figure 1, and you will get the difference (-10 to +10V DC) of voltage signals A and B. Convert this signal to V-shape signal (4 - 20mA DC) with 0V input as valley with our Linearizer (model: M2XF).

Figure 1

Current signals (e.g. 4 - 20mA DC)
Connect as in Figure 2, and you will get the difference of current signals A and B as voltage signal (-4 to +4V DC) with 250? resistor. Convert this signal to V-shape signal (4 - 20mA DC) with 0V input as valley with the Linearizer (model: M2XF).

Figure 2

You can get the difference (absolute value) of 2 signals with a single Linearizer model M2XF.

M-System has flexible solutions to meet your specific application and requirements. Consult our Signal Conditioners Data Library.