$Subsystem: Turret20, 0.625, 2.0
$Default PBanks: ( "BGreen" )
$Subsystem: Turret22, 0.625, 2.0
$Default PBanks: ( "TerSlash" )
$Subsystem: Turret24, 0.625, 2.0
$Default PBanks: ( "TerSlash" )
$Subsystem: Turret26, 0.625, 2.0
$Default PBanks: ( "TerSlash" )
$Subsystem: Turret27, 0.625, 2.0
$Default PBanks: ( "TerSlash" )
Well, there are five beams, though four are slashes and one is a BGreen.
If a science vessel should have beams, I don't see any reason to add more than a LTerSlash, since it is mounted on a Fenris, and probably is more energy efficient, since the science vessel also has a laboratory or two to keep operational, not to mention its solar panel, etc.