... key-presses 4. Suitable for various PLC brands OP320-A-SDescriptions: 3.7-inch Monochrome LCD,20 key-presses ... , 192*64 pixels, 7 function keys, RS232/RS485OP320-A-S3.7 inch monochrome LCD, 192*64 pixels, 20 ... keys, use TP software to programMP325-A OP320-A plus touch functionMP325-A-SOP320-A-S plus touch functionOP560-T5.7 inch, 256 ... PortRS485COM PortRS232 /RS422 3.7'' panel OP320-A-S XINJE panel