This part is a legacy part! It may predate similar or equivalent vanilla parts or use tricks to facilitate later functions by different means. It won't be further developed or supported but may be kept compatible.
The Bio Convergent Loader was introduced in 0.5.3 RC5. Among others it had been planned for a whole new faction. And was released along side those.
As it was released one year before the introduction of vanilla Ion Beam Prism its mechanic is not the same!
Build it like any armor on the surface. It should not be build internally and requires a direct line of sight (LOS) to the emitters. It must be powered by other bio armor or type of power network.
Abh 0.7.2.7 minor half code "upgrade" which replaced the original passive proxy based ammo consumption to an active system. This was done to get rid of the game's unreliable multi storage system which ignored all attached proxy storages except the first one. It's expected to be more reliable but could result in slightly different behavior or even break the system.