we made a mistake.
As we can see from the picture, I plugged the power plug into the CAN bus plug.
CANA_H is 29VDC, and CANB_L is the power ground.
Power supply current display is 11.0 mA（PCA82C250 batch number is nH9514Y）， but in annother PCA82C250（Batch number：nH910**），the current is 0.2mA。
I want to know why the current is differernt.