ABB IMASI13 Analog Input Module – 16-Channel, 24-Bit A/D, Harmony Rack I/O ABB Bailey IMASI13 is a Harmony rack I/O analog input module for the Symphony Enterprise Management and Control System. It interfaces analog field signals with the control system. Key Features Independent channel configuration Isolated A/D conversion Automatic and field calibration Cold-junction compensation Engineering-unit conversion Open-input detection Built-in diagnostics I/O expander bus