GE Fanuc IC660BBD020 24/48 VDC Source Block I/O ModuleDescription The IC660BBD020 is a 24 48 VDC Source Block I O Module manufactured by General Electric, designed for use in the Mark II Series within GE Speedtronic Control Systems. This block I O module is configurable and interfaces with 3 wire solid state and electromechanical sensors. It operates on either 24 or 48 VDC and is intended to supply current solely to output devices. The module includes 16 discrete circuits that can be configured as