Omron PLC input relay is used to receive PLC external switch (or analog) signal “window”, can only be driven by an external signal, can not be driven by program instructions. P-type machine input relay after installation I / 0 expansion can occupy up to 5 channels, the number 00 ~ 04, each channel has 16 relays. Omron C series P-type PLC input relay as shown in the table.

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