Answer: when the module is applied, such as direct plug-in welding, it is forbidden to use strong current lines on the PCB surface at the bottom of the module, and try to avoid wiring.
There is a one-to-one correspondence between the modules and their supporting transformers. This relationship binds them together during factory calibration (hardware differences are calibrated during calibration). Therefore, there is no saying that the transformers between the two modules can be interchanged or the customers can directly purchase the transformers for replacement. Such a product can not guarantee accuracy