How do I wire in a 4-20 mA current device to a Setra FLEX?

To wire a 4-20mA current device to a Setra FLEX, you will have to add a dropping resistor (250Ω, for example) to your set-up. The FLEX can only read a voltage input, so this resistor will ensure that the FLEX will see a 1-5V output equivalent to the 4-20 mA output signal.