API Audio 1608 Automation - Manual (Page 16)

2.6 System Architecture
The hardware and processing for the automation package is distributed among four subsystems:
 940B Automation Controller (ACM): System computer and primary control panel
 948B Fader Control Module (FCM): 8-channel fader control module, fader, and mute
 548B Input Module: Channel input module (automated insert)
 Rear Panel: Interface with DAW, Timecode, Automation Power Supply, and Expander(s)