The
SC Controller (6200 Series) is the second generation MOD 300 controller introduced in 1988. Up to 12 controller modules can be supported by a single Controller subsystem. The controlller module performs the primary functions of data acquisition and control, including I/O processing,continuous control, interlocks. sequential control and communications. For applications requiring controller redundancy two options are available. Subsystem redundancy, referred to as 11 to 1, where one controller can back up a single subsystem or card file redundancy, 3 to 1, where one controller backs up a single card file of the three possible card files in a subsystem. Besides upgraded hardware the SC controller also provided Taylor Remote I/O (TRIO) as an I/O option to the existing direct I/O available in the Model B controllers. Control processing was also augmented with the addition of Taylor Ladder Logic (TLL).
Local I/O for SC controllers consists of a separate termination board with 16 analog inputs, 8 analog outputs and up to 48 digital ins or outs, channel selectable. The I/O is made redundant through a switched backplane bus to another I/O board associated with the backup controller. The Model B controller was a packaged assembly consisting of the controller board and the I/O board. It contains the same 16 analog inputs, 8 analog outputs and up to 48 digital ins or outs, channel selectable as the SC controller I/O board. Redundancy is through a switched backplane bus to backup controller I/O board assembly. Both the Model B and the SC controller share the same field termination boards.
The Model B controller and SC controller I/O is now in its Limited phase where it is not actively sold. New or reconditions hardware is available from Parts and Logistics. Software is being continually upgraded to ABB’s latest offering for the MOD 300 allowing Model B and SC controller owners to move to ABB’s latest technology while maintaining their existing controller subsystems. A StepUp program is available as described in the Evolution section to upgrade to the latest AC400 Series if desired.