CHAPTER 3: Installation
Figure 8. Multipoint, 2-Wire (Half-Duplex).
Sample 4-Wire Multipoint Configuration
In the following application, an industrial controller is used to gather information from several remote programmable logic controller (PLC) stations (see Figure 9). A system protocol has been defined such that all the programmable logic controllers receive the information sent by the industrial controller, but only the remote station specifically addressed will respond. In this system, the industrial controller and all the remote stations are DTE devices. The
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