I looked at Manual, black wire is the IO-Link out (Out 1). 4-20 mA is on out 2, the white wire.
Ah, I was was under the impression that the IO-link output would take take of the signal conversion of 4-20 to a IO signal. Unfortunately the only analog input module I have is for +/-10V signals (X20AI4222). I have this IO-Link module (X20DS4387) that can operate as IO-link or standard input/outputs, so I wanted to see if it would be possible to get my output while eliminating the converter. But I guess a convertor is needed if I am using this hardware?
A work around could be a 500 ohm precision resistor across your input.