The most simple terms, the role of the terminal block for easy wiring. To pay attention to the distinction of model specifications. The terminal block, what other role? The McNair electrical analysis as follows:

1.isolation effect, can also play a role in control. In addition, short-circuit such as an external signal directly to the module, then there may be burned module circuit board or relay burned that the cost is small.

2.Anti-jamming, for example, some loads are sources of interference in nature.

3.The other terminal block detail before doing the design refer to the product design requirements, the manual recommended above design method is to meet the security, segregation, anti-jamming design ideas.

Wire connections between the different devices, you need the terminal block, some plug-ins (modules) to the terminal block.