So how exactly are you supposed to get the key card for the inner gate of Depot A which is behind the two now plasma turrets? You cannot out range them. They have huge amounts of HP. They can one shot you. There is no console which can disable them.
Did you screw stealthers over on purpose?
Plasma turrets have 10 initiative. You can't have lower than 11**, and if you're stealthy, you probably have at least 18-20. So you can just enter combat, win initiative, and run out of LOS. Then walk in, take a shot, and walk out. Repeat a bunch of times.
If you do have 11 initiative and don't want to mess around with RNG, then enter combat from out of LOS of the turrets, walk into LOS, shoot them, and walk away.
If all of that is still unacceptable, remember that there's a way into the back of that map which does not require you to engage with those turrets. And as Bruno pointed out above, there is in fact a terminal (guarded by a measly sentry bot) which you can hack to shut down the plasma turrets.
** Ugh, on second thought, I suppose with the right debuffs you could get down to...-2? 5+6 base, -2 for a Dex or Agi JS debuff, -10 for re-entering zone/crawling through a vent, plus isn't there something else that gives a -1? Bleh. I should know better than to make sweeping statements like "you can't"