Chapter 2 Specifications and System Configuratio n 2.3 Basic System Configuration 2.3.1 Introduction The AH500 system configuration is composed of a CPU module, power supply modules, digital input/output modules, analog input/output modules, temperature measurement modules, network modules, motion control modules, a main backplane, extension cables, and extension backplanes. Besides, an SD card is optionally used. A main backplane can be connected to an extension backplane through the interface on the left side of the main backplane, the interface on the left side of the extension backplane, and a Delta extension cable.
For a CPU module or a RTU, a main backplane can be connected to seven extension backplanes at most through the interfaces on the backplanes. Therefore, if there is a CPU module and there are several RTUs, not only the CPU module can be connected to seven extension backplanes, but also every RTU can connect to seven extension backplanes. There are two ports on an extension backplane. The upper port is used to connect to a superior backplane, and the lower port is used to connect to an inferior backplane. Main backplane Extension cable Extension backplane 1 Extension backplane 2 2-8 Number Name Description 10 s RUN/STOP R UN: The user program is executed. witch S TOP:
The execution of the user program stops. P COM1/COM2 ( roviding the RS-232/RS-485/RS-422 communication interface 11 for AHCPU5xx-RS2)