The IS200VAICH1DAB model is manufactured by GE to simulate an input/output board system for TMR or simplex applications in the Mark V. When used in a TMR system configuration, the terminal board, TBAIH1C, or STAI board from the connection will fan out to three VME racks: T, R, and S, each containing a VAIC board. The output signal Board on the VAIC will be made up of proprietary circuits, using all available VAIC boards to create the required current. If there is any IS200VAICH1DAB model rack failure on the VME, the faulty VAIC model will be removed from the output and the rest of the VAIC board can continue to provide the correct current. When the model is configured for the simplex method, the connected terminal plates will feed into one of the VAIC models, thus providing all current to the output. In the IS200VAICH1DAB model, it will control four analog outputs and accept up to 20 analog inputs. This model has an analog multiplexer, A/D converter, D/A converter, and signal regulator. This model has two analog inputs, ± 1 mA or 4-20 mA, which are connected by a jumper terminal board. The analog output circuit is divided; Two outputs can be configured to be 0-200 mA or 4-20 mA, while the other outputs are only 4-20 mA. Both the input and output of this IS200VAICH1DAB model contain high suppression circuits that protect against high-frequency noise and surges. DAB module is a module for industrial automation and process control, with digital input/output and analog input/output functions. It can be connected to industrial controllers (such as PLCS) to implement various control logic and data processing functions