The FlexPower C4, C8 lock controller modules add either 4 or 8 lock control outputs to a FlexPower power supply and are typically supplied as part of a system or purchased as an expansion piece to an existing system. Each module provides either 4 or 8 access control inputs capable of voltage or dry contact activation. Each module provides either 4 or 8 lock outputs, each one programmable for fail-safe, fail-secure, dry contact, and fire alarm over ride for egress lock control.