Foxboro P0916XT DCS module/CPU

Description

Practice has proven that most of the faults in PLC products are caused during the manufacturing process. In the manufacturing process, to ensure the reliability and stability of the product, the most important thing is product testing. Only through complete and comprehensive testing can problems in the product be identified and resolved. From the manufacturing process, the product testing of PLC can be divided into four parts:

Firstly, it is the testing of components, including the testing of outsourced components.

At this point, most sampling methods are used. In fact, before purchasing, the qualification of the supplier needs to be determined, to avoid non-standard component suppliers, and to establish long-term relationships with qualified suppliers. This can ensure that the incoming components will not have major problems fundamentally.

But even for long-term legitimate suppliers, pre warehousing inspection is required. Usually, a visual inspection is required first, including a list of quantities, verification of models, batch numbers, and production dates. Then, sample and inspect the components; Due to the high quality requirements of PLC, it is recommended to increase the sampling ratio as much as possible to increase the probability of detecting faulty components.

The second step is to conduct QC testing on each production and processing step during the production process.
For the production of PLC, the main task is the testing of circuit boards, which usually includes several processes such as screen printing, SMD, reflow soldering, wave soldering, manual plugins, and soldering. At this time, it is best to create a dedicated testing rack for each process of each module to ensure efficient and accurate measurement of the quality of each module. In the manufacturing process, once a quality problem is found, it is necessary to immediately identify the cause, whether it is due to the component itself or the processing quality. If it is the latter, after a relatively large proportion of faults such as solder joints occur, it is necessary to adjust the working parameters of the production equipment in a timely manner, ensuring both production speed and productivity, and reducing the failure rate. If PLC manufacturers have their own production lines, they should save the optimal production status parameters for each module, so that each time the same module is produced in the future, they can proceed with production according to this optimal state. Moreover, this optimal production status parameter needs to be constantly updated.

After the third step of assembly is completed, a performance test of the module needs to be conducted.
After the completion of production and manufacturing, it is the assembly process of the module. This step of testing is crucial because the most important performance testing is in this stage. Due to the large number of parameters that usually need to be tested for various modules of PLC, it is necessary to create a dedicated testing rack for each module of each model and use automatic testing equipment to ensure the comprehensiveness and completeness of testing parameters, as well as the productivity of testing. Finally, the module needs to be sent to the aging chamber for high-temperature aging. Testing after aging.

ACS601/R9
NBUB-41
NINP-61
NPOW-42
NGDR-02
NVAR-31
NXPP-01
NBRA-654
NBRA-656
SNAT-02
SXKH-9A15S/7.5
SNAT-03
ACS504-061-5
M1V4/2-4
380-415V
ACS504-140
ACS300
ACS400
SNAT-4041