23.04.2021, 06:28
From the photos it looks like you are using the same power supply for both scanners and LM. In this case GND is already common.
Some time ago I've tested LM with around 10 scanners connected and there were some issues with the communication. Turns out that scanners have RS485 line polarization resistors which should only be present on master device. Removing these resistors from LM helped but it's not a viable solution.
Some time ago I've tested LM with around 10 scanners connected and there were some issues with the communication. Turns out that scanners have RS485 line polarization resistors which should only be present on master device. Removing these resistors from LM helped but it's not a viable solution.