This back-plane is designed to accept five expansion cards, and to connect to a host system using a male Z50Bus connection on the right side. A pass-through connector is placed on the left side, allowing for daisy-chaining of multiple back-plane cards. This card is fully passive, so any buffering needs to be done on either the host system, or on the expansion cards.
If the Z50Bus backplane is used with Z80 IM2 host and IM2 based expansions, the Interrupt Chain signals IEI/IEO on this card are connected in a right-to-left order. This makes the first slot be on the right-hand side of the card, closest to the Z50Bus host.
The back-plane PCB is 100mm wide, and has mounting holes along both sides, allowing for robust mounting with easy insertion and removal of expansion cards.