The ABB IMASI23 module is an analog input module designed specifically for industrial automation systems, responsible for critical data acquisition tasks in industrial control systems. It can convert analog signals from various sensors on site, such as temperature, pressure, flow rate, liquid level, and other physical quantities, into digital signals and transmit them to the control system, providing accurate data basis for precise control and decision-making of the system. It is an indispensable basic component for achieving precise control of industrial automation.
Termination Units
The IMASI23 module uses one NTAI06 termination unit to connect to field signals. An NKAS01 or NKAS11 cable connects the termination unit to the ASI module through its P3 connector.
The termination unit contains RTDs used for cold junction compensation of thermocouple inputs. They also contain the circuitry needed to convert 4 to 20 milliampere field signals into the 1 to 5 VDC needed to input to the analog input module.
The system power supply is protected from short circuits by fuses on the NTAI06 termination unit.
Function Codes
NOTE: Refer to Appendix C for function code specification changes required when replacing an IMASI03 module with an IMASI23 module.
FCs 215 and 216 in the controller configure the ASI module and identify the active analog inputs. One FC 215 is required for each ASI module.
One FC 216 is required for each input channel used on the ASI module.
These function codes specify the I/O expander bus address of the ASI module and the channel number on the module connected to a specific analog input signal.
The type of the input and the zero and span in engineering units must also be specified to ensure proper scaling and corrections for calibration, cold junction compensation, and nonlinearity correction.
Add FC 215 and 216 to the controller to configure the ASI module. Set FC 217 in the controller to calibrate the ASI module or to set the user gain and offset values.
Refer to the Composer Function Code Application Manual for more information.
