I/O chassis
Reference
LIGO-D0902029: AdL IO Chassis Interface Backplane Board
LIGO-D1001715: I/O EXPANSION CHASSIS - TOP ASSEMBLY DRAWING
LIGO-D070071: Timing Slave
LIGO-D080335: DuoTone Board
LIGO-D0902006: AdL General Standards 16 Bit ADC Adapter Board
LIGO-D1000654: aLIGO 18-Bit DAC Adapter Board