SPQRS22 I/O module

A printed circuit board with connectors is installed on the back of the guide rail of the SPQRS22 I/O module to connect the slots into which the I/O module is inserted. The upper and lower parts of the slots allow the inserted modules to line up. The guide with SPQRS22 I/O module and processor is called the local I/O guide; Remote I/O rails with I/O modules, power supplies, remote I/O communication cards and installed away from the local I/O rails are called remote I/O rails. The number of remote I/O rails depends on the number of variables that different processors can control. The communication between the remote I/O guide rail and the processor can be realized in a variety of ways, including coaxial cable, biaxial cable, shielded twisted pair, etc. If the distance is relatively long and the problem of noise suppression needs to be considered, optical fiber communication can be adopted.