I have probably a pretty basic question, but it's been a long time since I've done hardware work on a BCM. My customer has an expansion module with a 16 station card. I need to replace with a 32 station card. My question is, can I just power down the expansion module to swap the card, or do I need to power down the whole system? Also, do I need to delete the 16 station card in programming before I remove the card as well? thank you in advance.