These ProWire Unified Power wall mount models are single and dual voltage access power systems, precision wired for MERCURY controllers. ProWire enables the specification and installation of standardized access power equipment across an enterprise for uniform operation, maintenance and servicing.The C8 or M8 control modules provide (16) sixteen access control inputs capable of voltage or dry contact activation, and (16) sixteen outputs programmable for failsafe / failsecure operation at either 12 or 24VDC and controlled by the power supply fire alarm interface. The D8 modules provide (16) sixteen auxiliary outputs. In dual voltage systems, each output is configurable for 12 or 24VDC operation.