HE123-PX2 16 channel pixel power breakout
The HE123-PX2 adds a further 16 fused outputs (per board) to the HE123 motherboard up to its maximum of 48 outputs which requires 2 HE123-PX. It is 1 of several expansion daughterboards that suit the HE123. It should only be used when space is at an absolute premium as the HE123-RJ/HE123-EX combo or 1 of the other expansion options makes for easier access to the Beaglebone Black and HE123 fuses.
-4 Heavy duty 30A (maximum) rated power input connector to 4 output fuses each
-16 7.5A mini fuses. Maximum of 10A per fuse/output connector.
-connection is made to the HE123-PX2 via plugging the HE123-PX onto the left or right hand side expansion connectors on the HE123 motherboard. The right expansion connector adds outputs 17-32. The left expansion header adds outputs 33-48.
The HE123 series manual is available here