If there is no network required and only one main module with some expansion modules is needed for the application, the down- and upload of the project to and from the main module happens over the standard RS232 or USB port. It allows system maintenance like monitoring too. Note：PR-E-RS485 module is required to connect the CPU to RS485 BUS. Note xLogic CPU may be equipped with expansion modules of the different voltage class, but expansion module must be supplied the correct power corresponding to its type. 2.
Hardware introduction 2.1 Naming Rules of PR Series PLC 1 - Basic Type Designation PR -- CPU module PR-E -- Expansion module 2 – Port of total I/Os 8 – 4 analog/digital input and 4 outputs 12 – 8 analog/digital input and 4 outputs 14 – 10 analog/digital input and 4 outputs 16 – 8analog/digital input and 8 outputs(Expansion module) 18 – 12 analog/digital input and 6 outputs 24 – 14 analog/digital input and 10 outputs 26 – 16 analog/digital input and 10 outputs 3 – Power supply 9 PR- 12 DC- DA- R- N- 4G 1 2 3 4 5 6 7