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This PLC series has 2 independent 232 serial ports, one is RS232 9pin port (2: TXD, 3: RXD, 5: GND), the other is TTL 4pin port (1: GXD, 2: TXD, 3: RXD, 4: 5V). These two ports are programmable and connected to a touch screen.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.