Description
In this project an NI CompactDaq chassis with 8 slots was used (NI cDAQ-9178), however only five modules were used:
The slots were filled with the following modules:
NI-9208 – 16 channels of 4mA-20mA analog input current values.
NI-9265 – 4 channels of 4mA-20mA analog output current values.
NI-9421 – 8 channels of 24V digital input
NI-9401 – 8 channels of high speed digital input and output
NI-9213 – 16 channels of 24bit thermocouples
The current analog outputs were operated with PWM, and controlled with an SCR, that operated a heater.
The thermocouple module was used to measure the temperature at different points in the system and worked in a PID mode.
The digital output and input was used to operate other devices and to synchronize other components in the system, as well as to sense digital switches in the system.
ReadyDAQ customized the order to meet the customer’s requirements, and since the software application was not build from scratch the software was delivered very fast and in reasonable budget
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