The chip of the earlier delivered LPUF-20 does not support the hot swapping of the sub-card on the LPUF-20. The chip of the later delivered LPUF-20 supports the hot swapping of the sub-card on the LPUF-20. The key field in the display version command output can distinguish whether the sub-card on an LPUF-20 is hot swappable.
LPU version information:
1. PCBVersion : CR52LPUK REV B-----------The sub-card only on the LPUF-20 whose version information contains REV C is hot swappable.