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7.How many COM part in PI series?
In PI 8000, there are 3 COM ports,
COM1 could support RS232 and RS485 at the same time, or support RS232 and RS422 at the same time.
COM2 could support RS232 and RS485 at the same time.
COM3 only support RS485 (it uses same COM port with COM2). So PI 8000 could connect 5 devices at the same time.
In PI 3000, there are 2 COM ports,
COM1 could support RS232 or RS485 or RS422. COM2 could support RS232 orRS485.
So PI 3000 could connect 2 devices at the same time.