MFC

Question 0

MFC Power Sources

Answer 0

Primary Alternate
1A. DC Essential Hot Emer Batt

1B. DC Bus 1 DC Emergency

2A. DC Emergency Hot Main Batt

2B. DC Bus 2 DC Emergency

Question 1

MFC Description

Answer 1

• 28VDC power supply
• An input/output circuit
• A computation unit
• For Modules 1A & 2A, a hard wired logic

Question 2

MFC Power Supply Switching

Answer 2

Power supply switching is automatic:

• from primary to alternate if primary voltage < 19V and if alternate voltage is > 22V;
• from alternate to primary if primary voltage is >22V.