... -presses 4. Suitable for various PLC brands OP320-A-SDescriptions: 3.7-inch Monochrome LCD,20 key-presses,Suitable for various PLC ... , 20 function keys, RS232/RS485MP330-SOperate panel with touch function, 3.7 inch monochrome, 192*64 pixels, 24ASCII*4 lines, 26 keys ... , use OP software to programMP360-LOperate panel with touch function, 3.7 inch monochrome, 192*64 pixels, 24ASCII*4 lines, 26 keys ...